WorldWideScience

Sample records for alternative work schedules

  1. Alternative Work Schedules Increase Employee Satisfaction.

    Science.gov (United States)

    Turney, John R.; Cohen, Stanley L.

    1983-01-01

    Facets of alternative work schedules (AWS) are discussed: importance of employee control, possible negative consequences, AWS handbook, time monitoring systems, and treatment of exceptions. AWS' effect on productivity and motivation is examined. (SK)

  2. Optimizing Fire Department Operations Through Work Schedule Analysis, Alternative Staffing, and Nonproductive Time Reduction

    Science.gov (United States)

    2014-09-01

    fatigue attributed to work-related stressors .19 On the other hand, research has shown that the 48/96 schedule exacerbates sleep deprivation issues...health and wellness initiatives, brown-out, fire department funding, peak-usage staffing, four-person staffing, schedule modification, sleep deprivation ...to a significant sleep deprivation risk that impacts the employee’s ability to function at peak levels.7 The 10/14-hour schedule produces better

  3. Nontraditional work schedules for pharmacists.

    Science.gov (United States)

    Mahaney, Lynnae; Sanborn, Michael; Alexander, Emily

    2008-11-15

    Nontraditional work schedules for pharmacists at three institutions are described. The demand for pharmacists and health care in general continues to increase, yet significant material changes are occurring in the pharmacy work force. These changing demographics, coupled with historical vacancy rates and turnover trends for pharmacy staff, require an increased emphasis on workplace changes that can improve staff recruitment and retention. At William S. Middleton Memorial Veterans Affairs Hospital in Madison, Wisconsin, creative pharmacist work schedules and roles are now mainstays to the recruitment and retention of staff. The major challenge that such scheduling presents is the 8 hours needed to prepare a six-week schedule. Baylor Medical Center at Grapevine in Dallas, Texas, has a total of 45 pharmacy employees, and slightly less than half of the 24.5 full-time-equivalent staff work full-time, with most preferring to work one, two, or three days per week. As long as the coverage needs of the facility are met, Envision Telepharmacy in Alpine, Texas, allows almost any scheduling arrangement preferred by individual pharmacists or the pharmacist group covering the facility. Staffing involves a great variety of shift lengths and intervals, with shifts ranging from 2 to 10 hours. Pharmacy leaders must be increasingly aware of opportunities to provide staff with unique scheduling and operational enhancements that can provide for a better work-life balance. Compressed workweeks, job-sharing, and team scheduling were the most common types of alternative work schedules implemented at three different institutions.

  4. Exosomes and Metabolic Function in Mice Exposed to Alternating Dark-Light Cycles Mimicking Night Shift Work Schedules.

    Science.gov (United States)

    Khalyfa, Abdelnaby; Poroyko, Valeriy A; Qiao, Zhuanhong; Gileles-Hillel, Alex; Khalyfa, Ahamed A; Akbarpour, Mahzad; Almendros, Isaac; Farré, Ramon; Gozal, David

    2017-01-01

    Sleep is an important modulator of metabolic function. Disruptions of sleep in circadian rhythm are common in modern societies and are associated with increased risk of developing cardiometabolic disorders. Exosomes are ubiquitous extracellular vesicles that may play a mechanistic role in metabolic derangements. We hypothesized that alternating dark-light cycles mimicking shift work in mice would alter fecal microbiota and colonic epithelium permeability and alter plasma exosome cargo and metabolic function. C57BL/6 mice were randomly assigned to (i) control day light (CL), or (ii) inverted dark-light every 2 weeks for 8 weeks (IN). Body weight, fat mass and HOMA-IR were measured, along with Tregs, metabolic, and resident macrophages in visceral white adipose tissue (vWAT). Fecal water samples were incubated with confluent colonic epithelium cell cultures in electric cell-substrate impedance sensing (ECIS) arrays, and plasma exosomes were added to differentiated adipocytes and insulin-induced pAKT/AKT expression changes were assessed by western blots. Mice exposed to IN showed elevated HOMA-IR, and their fecal samples showed altered microbiota which promote increased permeability of the colonic epithelial cell barrier. Plasma exosomes decreased pAKT/AKT responses to exogenous insulin compared to CL, and altered expression of circadian clock genes. Inflammatory macrophages (Ly-6c high ) were increased in IN-exposed vWAT, while Tregs were decreased. Thus, gut microbiota and the cargo of plasma exosomes are altered by periodic shifts in environmental lighting, and effectively alter metabolic function, possibly via induction of systemic inflammation and altered clock expression in target tissues. Further exploration of exosomal miRNA signatures in shift workers and their putative metabolic organ cell targets appears warranted.

  5. Exosomes and Metabolic Function in Mice Exposed to Alternating Dark-Light Cycles Mimicking Night Shift Work Schedules

    Directory of Open Access Journals (Sweden)

    Abdelnaby Khalyfa

    2017-11-01

    Full Text Available Sleep is an important modulator of metabolic function. Disruptions of sleep in circadian rhythm are common in modern societies and are associated with increased risk of developing cardiometabolic disorders. Exosomes are ubiquitous extracellular vesicles that may play a mechanistic role in metabolic derangements. We hypothesized that alternating dark-light cycles mimicking shift work in mice would alter fecal microbiota and colonic epithelium permeability and alter plasma exosome cargo and metabolic function. C57BL/6 mice were randomly assigned to (i control day light (CL, or (ii inverted dark-light every 2 weeks for 8 weeks (IN. Body weight, fat mass and HOMA-IR were measured, along with Tregs, metabolic, and resident macrophages in visceral white adipose tissue (vWAT. Fecal water samples were incubated with confluent colonic epithelium cell cultures in electric cell-substrate impedance sensing (ECIS arrays, and plasma exosomes were added to differentiated adipocytes and insulin-induced pAKT/AKT expression changes were assessed by western blots. Mice exposed to IN showed elevated HOMA-IR, and their fecal samples showed altered microbiota which promote increased permeability of the colonic epithelial cell barrier. Plasma exosomes decreased pAKT/AKT responses to exogenous insulin compared to CL, and altered expression of circadian clock genes. Inflammatory macrophages (Ly-6chigh were increased in IN-exposed vWAT, while Tregs were decreased. Thus, gut microbiota and the cargo of plasma exosomes are altered by periodic shifts in environmental lighting, and effectively alter metabolic function, possibly via induction of systemic inflammation and altered clock expression in target tissues. Further exploration of exosomal miRNA signatures in shift workers and their putative metabolic organ cell targets appears warranted.

  6. Alternative schedules of levothyroxine administration.

    Science.gov (United States)

    Geer, Melanie; Potter, Donald Mark; Ulrich, Heather

    2015-03-01

    Published evidence on bedtime versus prebreakfast administration of levothyroxine is reviewed. Because levothyroxine absorption has been shown to increase when the drug is administered to patients in a fasted state, the standard recommendation is that levothyroxine be taken one half to one hour prior to breakfast and at least four hours before or after potentially interacting drugs. However, compliance with this recommendation may be problematic for patients with unpredictable or variable schedules. A literature search identified four published studies of bedtime levothyroxine dosing. Two of the studies demonstrated a significant decrease in levels of thyroid-stimulating hormone (TSH) with levothyroxine administration at bedtime versus 30 minutes before breakfast, one study showed an increase in TSH when levothyroxine was taken at bedtime versus one hour before breakfast, and one study found no significant differences in TSH levels or other thyroid function monitoring limitations with bedtime versus standard dosing in subjects naive to levothyroxine therapy. The inconsistent study findings may be attributable to a number of variables, including dietary differences among the study populations, the use of potentially interacting supplements in one study, and variable intervals between levothyroxine administration and food intake. Neither dosing method correlated with substantial changes in assessments of quality of life or symptom severity; in two of the studies, patients indicated a preference for bedtime levothyroxine administration. Based on the available literature, bedtime administration of levothyroxine is an option for patients with hypothyroidism who want to avoid taking their medication with food. Copyright © 2015 by the American Society of Health-System Pharmacists, Inc. All rights reserved.

  7. The Effect of Alternative Work Schedules (AWS) on Performance During Acquisition Based Testing at the U.S. Army Aberdeen Test Center

    Science.gov (United States)

    2014-09-01

    week Telework/ Telecommuting  “[t]he term ’telework’ or ’teleworking’ refers to a work flexibility arrangement under which an employee performs the...including: flextime, telecommuting , compressed work schedules and job sharing. All employees of KPMG are eligible to take advantage of the workplace...flextime, compressed work schedules and telecommuting (also known as virtual office at Kodak). Although Kodak, like ATC, has not analyzed data to

  8. Maternal Nonstandard Work Schedules and Breastfeeding Behaviors

    OpenAIRE

    Zilanawala, A.

    2017-01-01

    Objectives: Although maternal employment rates have increased in the last decade in the UK, there is very little research investigating the linkages between maternal nonstandard work schedules (i.e., work schedules outside of the Monday through Friday, 9–5 schedule) and breastfeeding initiation and duration, especially given the wide literature citing the health advantages of breastfeeding for mothers and children. Methods This paper uses a population-based, UK cohort study, the Millennium Co...

  9. Maternal Nonstandard Work Schedules and Breastfeeding Behaviors.

    Science.gov (United States)

    Zilanawala, Afshin

    2017-06-01

    Objectives Although maternal employment rates have increased in the last decade in the UK, there is very little research investigating the linkages between maternal nonstandard work schedules (i.e., work schedules outside of the Monday through Friday, 9-5 schedule) and breastfeeding initiation and duration, especially given the wide literature citing the health advantages of breastfeeding for mothers and children. Methods This paper uses a population-based, UK cohort study, the Millennium Cohort Study (n = 17,397), to investigate the association between types of maternal nonstandard work (evening, night, away from home overnight, and weekends) and breastfeeding behaviors. Results In unadjusted models, exposure to evening shifts was associated with greater odds of breastfeeding initiation (OR 1.71, CI 1.50-1.94) and greater odds of short (OR 1.55, CI 1.32-1.81), intermediate (OR 2.01, CI 1.64-2.47), prolonged partial duration (OR 2.20, CI 1.78-2.72), and prolonged exclusive duration (OR 1.53, CI 1.29-1.82), compared with mothers who were unemployed and those who work other types of nonstandard shifts. Socioeconomic advantage of mothers working evening schedules largely explained the higher odds of breastfeeding initiation and duration. Conclusions Socioeconomic characteristics explain more breastfeeding behaviors among mothers working evening shifts. Policy interventions to increase breastfeeding initiation and duration should consider the timing of maternal work schedules.

  10. Parental Work Schedules and Adolescent Risky Behaviors

    Science.gov (United States)

    Han, Wen-Jui; Miller, Daniel P.; Waldfogel, Jane

    2010-01-01

    Using a large contemporary data set (the National Longitudinal Survey of Youth-Child Supplement), the authors examined the effects of parental work schedules on adolescent risky behaviors at age 13 or 14 and the mechanisms that might explain them. Structural equation modeling suggests mothers who worked more often at night spent significantly less…

  11. 48 CFR 1352.271-73 - Schedule of work.

    Science.gov (United States)

    2010-10-01

    ... 48 Federal Acquisition Regulations System 5 2010-10-01 2010-10-01 false Schedule of work. 1352.271... of work. As prescribed in 48 CFR 1371.104, insert the following clause. Schedule of Work (APR 2010... arrival at the contractor's facility: (1) Production Schedule. (2) Work Package Network. (3) Total...

  12. Developing optimal nurses work schedule using integer programming

    Science.gov (United States)

    Shahidin, Ainon Mardhiyah; Said, Mohd Syazwan Md; Said, Noor Hizwan Mohamad; Sazali, Noor Izatie Amaliena

    2017-08-01

    Time management is the art of arranging, organizing and scheduling one's time for the purpose of generating more effective work and productivity. Scheduling is the process of deciding how to commit resources between varieties of possible tasks. Thus, it is crucial for every organization to have a good work schedule for their staffs. The job of Ward nurses at hospitals runs for 24 hours every day. Therefore, nurses will be working using shift scheduling. This study is aimed to solve the nurse scheduling problem at an emergency ward of a private hospital. A 7-day work schedule for 7 consecutive weeks satisfying all the constraints set by the hospital will be developed using Integer Programming. The work schedule for the nurses obtained gives an optimal solution where all the constraints are being satisfied successfully.

  13. 48 CFR 1371.104 - Schedule of work.

    Science.gov (United States)

    2010-10-01

    ... 48 Federal Acquisition Regulations System 5 2010-10-01 2010-10-01 false Schedule of work. 1371.104 Section 1371.104 Federal Acquisition Regulations System DEPARTMENT OF COMMERCE DEPARTMENT SUPPLEMENTAL... of work. Insert clause 1352.271-73, Schedule of Work, in all solicitations and contracts for ship...

  14. Maternal Nonstandard Work Schedules and Child Cognitive Outcomes

    Science.gov (United States)

    Han, Wen-Jui

    2005-01-01

    This paper examined associations between mothers' work schedules and children's cognitive outcomes in the first 3 years of life for approximately 900 children from the National Institute of Child Health and Human Development Study of Early Child Care. Both the timing and duration of maternal nonstandard work schedules were examined. Although…

  15. Parental work schedules and child overweight and obesity.

    Science.gov (United States)

    Champion, S L; Rumbold, A R; Steele, E J; Giles, L C; Davies, M J; Moore, V M

    2012-04-01

    Studies in school-age children have consistently shown a positive association between maternal paid work hours and child obesity. However, there is conflicting evidence about the impact of maternal work hours scheduled at nonstandard times (for example, evenings, nights or weekends), and no previous examination of paternal work schedules and child weight. We examined the associations between maternal, paternal and combined parental paid work schedules and overweight/obesity in children at age 9 years. Data were analysed from the most recent follow-up of 9-year-old children (n=434) in an Australian birth cohort study. Children were measured and classified as overweight/obese using the International Obesity Taskforce body mass index cutoff points. Current working conditions of parents were obtained from a structured interview with the primary caregiver. Logistic regression analyses were used to investigate the effect of parental work schedules on child overweight/obesity with adjustment for a range of sociodemographic and household factors associated with parental employment and child weight. At 9 years of age, 99 children (22.8%) were overweight or obese. When parental work schedules were examined separately, child overweight/obesity was significantly associated with paternal nonstandard work schedules (adjusted odds ratio (OR) 1.97, 95% confidence interval (CI) 1.08-3.61). There was no association with any type of maternal work schedule. We also found an association between child overweight/obesity and circumstances in which both parents worked nonstandard schedules; however, this was of borderline statistical significance in the adjusted models (adjusted OR 2.26, 95% CI 0.99-5.16). Work hours scheduled at nonstandard times, when worked by the father or both parents, were associated with child overweight and obesity. These findings indicate the potential importance of fathers' paid work arrangements for child overweight/obesity, which until recently has largely

  16. Parents' Family Time and Work Schedules: The Split-Shift Schedule in Spain

    NARCIS (Netherlands)

    Gracia, P.; Kalmijn, M.

    2016-01-01

    This study used data on couples from the 2003 Spanish Time Use Survey (N = 1,416) to analyze how work schedules are associated with family, couple, parent–child, and non-family leisure activities. Spain is clearly an interesting case for the institutionalized split-shift schedule, a long lunch break

  17. Work schedule manager gap analysis : assessing the future training needs of work schedule managers using a strategic job analysis approach

    Science.gov (United States)

    2010-05-01

    This report documents the results of a strategic job analysis that examined the job tasks and knowledge, skills, abilities, and other characteristics (KSAOs) needed to perform the job of a work schedule manager. The strategic job analysis compared in...

  18. Rethinking the Clockwork of Work: Why Schedule Control May Pay Off at Work and at Home.

    Science.gov (United States)

    Kelly, Erin L; Moen, Phyllis

    2007-11-01

    Many employees face work-life conflicts and time deficits that negatively affect their health, well-being, effectiveness on the job, and organizational commitment. Many organizations have adopted flexible work arrangements but not all of them increase schedule control, that is, employees' control over when, where, and how much they work. This article describes some limitations of flexible work policies, proposes a conceptual model of how schedule control impacts work-life conflicts, and describes specific ways to increase employees' schedule control, including best practices for implementing common flexible work policies and Best Buy's innovative approach to creating a culture of schedule control.

  19. 5 CFR 610.407 - Premium pay for holiday work for employees on compressed work schedules.

    Science.gov (United States)

    2010-01-01

    ... pay for holiday work for employees on compressed work schedules. (a) An employee on a compressed schedule who performs work on a holiday is entitled to basic pay, plus premium pay at a rate equal to basic... 5 Administrative Personnel 1 2010-01-01 2010-01-01 false Premium pay for holiday work for...

  20. Washington State Pediatricians' Attitudes Toward Alternative Childhood Immunization Schedules

    Science.gov (United States)

    Wightman, Aaron; Marcuse, Edgar K.; Taylor, James A.

    2011-01-01

    OBJECTIVE: To determine the frequency of parents' requests for alternative childhood immunization schedules (ACISs) and pediatricians' comfort with and willingness to use ACISs. METHODS: Washington State primary care pediatricians were asked to complete an Internet-based survey on ACISs. The main outcome measures were the frequency of parents' requests for ACISs, pediatricians' comfort with their use, and pediatricians' willingness to use ACISs for individual vaccines. In addition, respondents were asked to characterize their practices and to provide demographic information. RESULTS: Of the 311 respondents (response rate: 65%), 209 met inclusion criteria and were included in analyses. Overall, 77% of eligible respondents reported that parents sometimes or frequently requested ACISs, and 61% were comfortable using an ACIS if requested by a parent. Pediatricians were least willing to consider using ACISs for diphtheria-tetanus toxoids-acellular pertussis vaccine, Haemophilus influenzae type b vaccine, and pneumococcal conjugate vaccine. Pediatricians who practiced in a neighborhood or community clinic were less comfortable using ACISs than were those in a 1- or 2-physician practice (odds ratio: 0.10). CONCLUSIONS: Washington State pediatricians are regularly being asked to use ACISs, and most of them are comfortable using them if requested. Pediatricians are least willing to delay H influenzae type b vaccine, diphtheria-tetanus toxoids-acellular pertussis vaccine, and pneumococcal conjugate vaccine, which suggests prioritization of immunizations that protect against potentially devastating bacterial infections of infancy and early childhood. PMID:22123877

  1. Decommissioning alternatives, process and work activities

    International Nuclear Information System (INIS)

    Anon.

    1986-01-01

    The following outlines the topics discussed under Decommissioning Alternatives, Process and Work Activities: (1) decommissioning alternatives, (2) work activities for prompt removal/dismantling, (3) work activities for entombment with delayed dismantling, and (4) work activities for mothballing with delayed dismantling

  2. Nonstandard Work Schedules and Partnership Quality : Quantitative and Qualitative Findings

    NARCIS (Netherlands)

    Mills, Melinda; Täht, K

    This article questions existing findings and provides new evidence about the consequences of nonstandard work schedules on partnership quality. Using quantitative couple data from The Netherlands Kinship Panel Study (NKPS) (N = 3,016) and semistructured qualitative interviews (N = 34), we found

  3. The timing of work and work-family conflicts in Spain: who has a split work schedule and why?

    OpenAIRE

    Amuedo-Dorantes, Catalina; de la Rica, Sara

    2009-01-01

    Spain, as other south-Mediterranean countries, is characterized for the predominance of split work schedules. Split work schedules typically consist of 5 hours of work in the morning (typically from 9 am to 2 pm), followed by a 2 hour break and another 3 hours of work in the afternoon/evening (typically from 4 pm to 7 pm). Because of the evening work hours, split work schedules are contributing to work-family conflicts in the midst of significantly higher female labor force participation. Our...

  4. Associations Among Work and Family Health Climate, Health Behaviors, Work Schedule, and Body Weight.

    Science.gov (United States)

    Buden, Jennifer C; Dugan, Alicia G; Faghri, Pouran D; Huedo-Medina, Tania B; Namazi, Sara; Cherniack, Martin G

    2017-06-01

    Correctional employees exhibit elevated obesity rates. This study examines interrelations among health behaviors, health climate, body mass index (BMI), and work schedule. Using survey results from correctional supervisors (n = 157), mediation and moderated-mediation analyses were performed to examine how health behaviors explain relationships between obesity, work health climate (WHC) and family health climate (FHC), and work schedule. Over 85% of the sample was overweight/obese (mean BMI = 30.20). Higher WHC and FHC were associated with lower BMI, mediated by nutrition, and physical activity. The interaction effect between health behavior and work schedule revealed a protective effect on BMI. Overtime shift work may share a relationship with BMI. Findings may have implications for reexamining organizational policies on maximum weekly overtime in corrections. They provide direction for targeted obesity interventions that encourage a supportive FHC and promote healthy behaviors among supervisors working overtime.

  5. Nursing teamwork, staff characteristics, work schedules, and staffing.

    Science.gov (United States)

    Kalisch, Beatrice J; Lee, Hyunhwa

    2009-01-01

    This study aimed to explore whether and how staff characteristics, staffing, and scheduling variables are associated with the level of teamwork in nursing staff on acute care hospital patient units. This was a cross-sectional study with a sample of 1,758 nursing staff members from two different hospitals on 38 patient care units who completed the Nursing Teamwork Survey in 2008. This study focused on nursing teams who are stationed on a particular patient care unit (as opposed to visitors to the units). The return rate was 56.9%. The sample was made up of 77.4% nurses (registered nurses and licensed practical nurses), 11.9% assistive personnel, and 7.9% unit secretaries. Teamwork varied by unit and service type, with the highest scores occurring in pediatrics and maternity and the lowest scores on the medical-surgical and emergency units. Staff with less than 6 months of experience, those working 8- or 10-hour shifts (as opposed to 12 hours or a combination of 8 and 12 hours), part-time staff (as opposed to full time), and those working on night shift had higher teamwork scores. The higher teamwork scores were also associated with no or little overtime. The higher perception of the adequacy of staffing and the fewer patients cared for on a previous shift, the higher the teamwork scores. There is a relationship between selected staff characteristics, aspects of work schedules, staffing, and teamwork. Nursing staff want to work where teamwork is high, and perceptions of good staffing lead to higher teamwork. Higher teamwork scores correlated with those who worked less overtime.

  6. PHENIX Work Breakdown Structure. Cost and schedule review copy

    Energy Technology Data Exchange (ETDEWEB)

    1994-02-01

    The Work Breakdown Structure (WBS) Book begins with this Overview section, which contains the high-level summary cost estimate, the cost profile, and the global construction schedule. The summary cost estimate shows the total US cost and the cost in terms of PHENIX construction funds for building the PHENIX detector. All costs in the WBS book are shown in FY 1993 dollars. Also shown are the institutional and foreign contributions, the level of pre-operations funding, and the cost of deferred items. Pie charts are presented at PHENIX WBS level 1 and 2 that show this information. The PHENIX construction funds are shown broken down to PHENIX WBS level 3 items per fiscal year, and the resulting profile is compared to the RHIC target profile. An accumulated difference of the two profiles is also shown. The PHENIX global construction schedule is presented at the end of the Overview section. Following the Overview are sections for each subsystem. Each subsystem section begins with a summary cost estimate, cost profile, and critical path. The total level 3 cost is broken down into fixed costs (M&S), engineering costs (EDIA) and labor costs. Costs are further broken down in terms of PHENIX construction funds, institutional and foreign contributions, pre-operations funding, and deferred items. Also shown is the contingency at level 3 and the level 4 breakdown of the total cost. The cost profile in fiscal years is shown at level 3. The subsystem summaries are followed by the full cost estimate and schedule sheets for that subsystem. These detailed sheets are typically carried down to level 7 or 8. The cost estimate shows Total, M&S, EDIA, and Labor breakdowns, as well as contingency, for each WBS entry.

  7. A preliminary analysis of the reactor-based plutonium disposition alternative deployment schedules

    Energy Technology Data Exchange (ETDEWEB)

    Zurn, R.M.

    1997-09-01

    This paper discusses the preliminary analysis of the implementation schedules of the reactor-based plutonium disposition alternatives. These schedule analyses are a part of a larger process to examine the nine decision criteria used to determine the most appropriate method of disposing of U.S. surplus weapons plutonium. The preliminary analysis indicates that the mission durations for the reactor-based alternatives range from eleven years to eighteen years and the initial mission fuel assemblies containing surplus weapons-usable plutonium could be loaded into the reactors between nine and fourteen years after the Record of Decision.

  8. A preliminary analysis of the reactor-based plutonium disposition alternative deployment schedules

    International Nuclear Information System (INIS)

    Zurn, R.M.

    1997-09-01

    This paper discusses the preliminary analysis of the implementation schedules of the reactor-based plutonium disposition alternatives. These schedule analyses are a part of a larger process to examine the nine decision criteria used to determine the most appropriate method of disposing of U.S. surplus weapons plutonium. The preliminary analysis indicates that the mission durations for the reactor-based alternatives range from eleven years to eighteen years and the initial mission fuel assemblies containing surplus weapons-usable plutonium could be loaded into the reactors between nine and fourteen years after the Record of Decision

  9. OPTIMAL WORK-REST SCHEDULE FOR COMPUTER USERS

    Directory of Open Access Journals (Sweden)

    Mervat Abdelrahman Mohamed

    2017-04-01

    Full Text Available Background: Musculoskeletal disorders are the most common health problems for computer users who work for an extended period. The aim of this study was to identify the best work-rest schedule with the three different work-rest groups: no rest break, mid-rest break, and multiple- rest breaks, which was associated with the least EMG activities of the upper trapezius muscle and would be beneficial for musculoskeletal health. Methods: Forty-five right-handed females complaining of neck discomfort were randomly assigned into three equal groups, Group1 (no rest break they were be engaged in sixty minutes of typing followed by ten minutes break (60-10, group 2 (mid-rest break thirty minutes of typing followed by five minutes break (30-5, and group 3 (multiple rest breaks fifteen minutes of typing followed by 2.5 minutes break (15-2.5. Surface EMG was used to pick up the electrical activity of right and left upper trapezius throughout the computer typing task. Results: There was a statistically significant reduction of normalized RMS (p<0.05 between the three groups for both right and left upper trapezius. Also, our results demonstrated a positive effect of mid and multiple rest breaks regarding reduced muscle activity in the upper trapezius muscle during a computer work. Conclusion: There is a positive effect of mid and multiple rest breaks regarding reduced muscle activity in the upper trapezius muscle throughout a computer work in subjects with neck and shoulder discomfort.

  10. The Risk of Developing Diabetes in Association With Long Working Hours Differs by Shift Work Schedules.

    Science.gov (United States)

    Bannai, Akira; Yoshioka, Eiji; Saijo, Yasuaki; Sasaki, Sachiko; Kishi, Reiko; Tamakoshi, Akiko

    2016-09-05

    The impact of long working hours on diabetes is controversial; however, shift work is known to increase the risk of diabetes. This study aimed to investigate the association between long working hours and diabetes among civil servants in Japan separately by shift work schedules. A prospective cohort study was conducted from April 2003 to March 2009. A total of 3195 men aged ≥35 years who underwent an annual health checkup at baseline were analyzed by shift work schedules (2371 non-shift workers and 824 shift workers). Self-reported working hours were categorized as 35-44 and ≥45 hours per week. The incidence of diabetes was confirmed by fasting plasma glucose concentration ≥126 mg/dL and/or self-reported medical diagnosis of diabetes at the annual checkup. A Cox proportional model was used to calculate hazard ratios (HRs) and 95% confidence intervals (CIs) for developing diabetes associated with long working hours. The median follow-up period of non-shift and shift workers was 5.0 and 4.9 years, respectively. During this period, 138 non-shift workers and 46 shift workers developed diabetes. A decreased HR was found among non-shift workers working ≥45 hours per week (HR 0.84; 95% CI, 0.57-1.24); however, shift workers working ≥45 hours per week had a significantly increased risk of diabetes (HR 2.43; 95% CI, 1.21-5.10) compared with those working 35-44 hours per week. An analysis restricted to non-clerical workers also showed similar results. The risk of diabetes associated with long working hours differed by shift work schedules.

  11. Immunogenicity and reactogenicity of alternative schedules of HPV vaccine in Vietnam: a cluster randomized noninferiority trial.

    Science.gov (United States)

    Neuzil, Kathleen M; Canh, Do Gia; Thiem, Vu Dinh; Janmohamed, Amynah; Huong, Vu Minh; Tang, Yuxiao; Diep, Nguyen Thi Ngoc; Tsu, Vivien; LaMontagne, D Scott

    2011-04-13

    Human papillomavirus (HPV) vaccine programs may decrease the morbidity and mortality due to cervical cancer seen among women in low-resource countries. However, the 3-dose schedule over a 6-month period is a potential barrier to vaccine introduction in such settings. To determine the immunogenicity and reactogenicity of different dosing schedules of quadrivalent HPV vaccine in adolescent girls in Vietnam. Open-label, cluster randomized, noninferiority study (conducted between October 2007 and January 2010) assessing 4 schedules of an HPV vaccine delivered in 21 schools to 903 adolescent girls (aged 11-13 years at enrollment) living in northwestern Vietnam. Intramuscular injection of 3 doses of quadrivalent HPV vaccine delivered on a standard dosing schedule (at 0, 2, and 6 months) and 3 alternative dosing schedules (at 0, 3, and 9 months; at 0, 6, and 12 months; or at 0, 12, and 24 months). Serum anti-HPV geometric mean titers (GMT) measured 1 month after the third dose of the HPV vaccine was administered; GMT was determined by type-specific competitive immunoassay. Noninferiority of each alternative vaccination dosing schedule was achieved if the lower bound of the multiplicity-adjusted confidence interval (CI) of the type-specific GMT ratio for HPV-16 and HPV-18 was greater than 0.5 (primary outcome). Safety outcomes were immediate reactions, local reactions, fever within 7 days after each dose, and serious adverse events up to 30 days following the last dose. In the intention-to-treat analysis, 809 girls who received at least 1 HPV vaccine dose had valid serum measurements 1 month after the third dose. After the third dose, the GMTs for those in the standard schedule group who received doses at 0, 2, and 6 months were 5808.0 (95% CI, 4961.4-6799.0) for HPV-16 and 1729.9 (95% CI, 1504.0-1989.7) for HPV-18; 5368.5 (95% CI, 4632.4-6221.5) and 1502.3 (95% CI, 1302.1-1733.2), respectively, for those whose received doses at 0, 3, and 9 months; 5716.4 (95% CI, 4876

  12. 48 CFR 836.575 - Schedule of work progress.

    Science.gov (United States)

    2010-10-01

    ... CATEGORIES OF CONTRACTING CONSTRUCTION AND ARCHITECT-ENGINEER CONTRACTS Contract Clauses 836.575 Schedule of... threshold for construction and that do not contain a section entitled “Network Analysis System (NAS).” ...

  13. Impact of flexible scheduling on employee performance regarding stress and work-family conflict

    OpenAIRE

    Raja Abdul Ghafoor Khan; Furqan Ahmad Khan; Dr. Muhammad Aslam Khan; Mohsin Shakeel

    2011-01-01

    Stress, work-family conflicts and flexible scheduling are three of the most important elements in organizational studies. The focus of current study is to understand the effect of Stress,work family conflicts and flexible scheduling on employee’s performance and also to understand whether flexible scheduling helps in reducing stress and work-family conflicts or not. The back bone of this study is the secondary data comprised of comprehensive literature review. A survey has also been conducted...

  14. Sustainable employability in shiftwork: related to types of work schedule rather than age.

    Science.gov (United States)

    Peters, Velibor; Engels, Josephine A; de Rijk, Angelique E; Nijhuis, Frans J N

    2015-10-01

    There is scarce research on age and sustainable employability of nurses working in various types of work schedules. Earlier research showed that nurses working in work schedules differ regarding age. Different operationalisations of age might explain variations in sustainable employability. Therefore, the aim of this study was to investigate how nurses working in various types of work schedule differ regarding sustainable employability, and the role that age plays in these differences. Age was defined as chronological age, organisational age, life-span age, and functional age. Questionnaires were distributed to 974 Dutch nurses in residential elder care (response rate 51 %) with questions about the type of work schedule, aspects of sustainable employability, various operationalisations of age, and registered sickness absence data were used. Nurses working in various types of work schedules differed regarding aspects of sustainable employability, also when operationalisations of age were added. The 'life-span age' was directly related to aspects of sustainable employability. Statistically, work ability and job satisfaction were only explained by varying operationalisations of age. Nurses' sustainable employability appeared to be mainly related to differences between the types of work schedule rather than age. Fixed early shifts are characterised by the most positive aspects of sustainable employability, and three rotating schedules score worst. To improve sustainable employability, organisations should implement a system in which nurses with different types of work schedule are monitored in combination with their life-span perspective.

  15. Features of scheduled repair work of road transport

    Directory of Open Access Journals (Sweden)

    Mahmudova F. M.

    2017-11-01

    Full Text Available the developed mathematical optimization model for the scheduled repair periodicity of the motor vehicle aggregates that provide traffic safety allows to increase the level of fail-safety, acceptable costs and any laws of their resources distribution. The article describes the possibilities of the model expansion taking into account the cost of the restored spare part.

  16. Comparison of Shift Work-related Health Problems in 12-hour Shift Schedules of Petrochemical Industries

    Directory of Open Access Journals (Sweden)

    S. Khavvaji

    2011-01-01

    Full Text Available Background and aims Shiftwork that affects diverse aspects of human life is arranged in various schedules, each has its own advantages and disadvantages. This study was carried out with the objectives of determination of common 12-hour shift schedules in petrochemical plants, comparison of shift work health-related problems among employees working in different shift schedules and recommendation of appropriate shift schedule for decrement of related health problems.      methodsThis cross-sectional study was conducted at 8 petrochemical plants in Asalooyeh region related to National Petrochemical Industries in which 12-hour shift schedules were applied. Study population consisted of 549 shift workers with age mean of 29.83±5.75 years. Data on personal details, shift schedule and adverse health effects of shiftwork (i.e. gastrointestinal, cardiovascular, musculoskeletal, psychological, sleep etc. disorders were collected by anonymous questionnaire.   Results Among 549 studied shift employees, 39.6% worked in 4N-7D-3N-7Res (4night-7day-3night-7rest, 29.1% in 7N-7D-7Res and 31.3% in 7D-7N-7Res schedules. Statistical comparison showed that the prevalence of h ealth problems such as gastrointestinal, cardiovascular and musculoskeletal disorders among 7D-7N-7Res schedule shiftworkers were significantly higher than that of other schedules (p0.05.     Conclusion Prevalence of gastrointestinal, cardiovascular and musculoskeletal disorders in all schedules were high, but odds ratios of all problems among 7D-7N-7Res schedule shiftworkers were significantly more than those of the shiftworkers of the other schedules. This schedule should, therefore, be changed to decrease related-health problems. Fixed 14D/14N schedule may be an appropriate substitution.  

  17. Employee Responses to Flexible Work Schedules: An Inter-Organization, Inter-System Comparison.

    Science.gov (United States)

    Pierce, Jon L.; Newstrom, John W.

    1982-01-01

    Compared employee affective and behavioral responses to four work schedules--a fixed-hour schedule and three variations of flexible working hours. Hypothesized systematic differences in employee responses reflecting increased flexibility were not supported. Employees generally responded more favorably to flexible hour systems as contrasted with…

  18. Couples’ work schedules and child-care use in the Netherlands

    NARCIS (Netherlands)

    Verhoef, Melissa; Roeters, Anne; van der Lippe, Tanja

    2016-01-01

    Various aspects of parental work schedules affect the opportunities and constraints that parents encounter when arranging care for their children. This study examined the extent to which the combination of couples’ work schedules was associated with their use of different types of child care,

  19. Nonstandard Work Schedules, Family Dynamics, and Mother-Child Interactions During Early Childhood.

    Science.gov (United States)

    Prickett, Kate C

    2018-03-01

    The rising number of parents who work nonstandard schedules has led to a growing body of research concerned with what this trend means for children. The negative outcomes for children of parents who work nonstandard schedules are thought to arise from the disruptions these schedules place on family life, and thus, the types of parenting that support their children's development, particularly when children are young. Using a nationally representative sample of two-parent families (Early Childhood Longitudinal Study-Birth cohort, n = 3,650), this study examined whether mothers' and their partners' nonstandard work schedules were associated with mothers' parenting when children were 2 and 4 years old. Structural equation models revealed that mothers' and their partners' nonstandard work schedules were associated with mothers' lower scores on measures of positive and involved parenting. These associations were mediated by fathers' lower levels of participation in cognitively supportive parenting and greater imbalance in cognitively supportive tasks conducted by mothers versus fathers.

  20. Flextime: A Modified Work Force Scheduling Technique for Selected Headquarters Air Force Logistics Command Organizations.

    Science.gov (United States)

    Kimzey, Reed T.; Prince, Samuel M. O.

    The thesis discusses the advantages and disadvantages of one work force scheduling technique--flextime. The authors were interested in determining if a flextime schedule could be put into effect in a governmental organization such as Headquarters Air Force Logistics Command (AFLC). The study objectives were to determine the feasibility,…

  1. Nonstandard Maternal Work Schedules: Implications for African American Children’s Early Language Outcomes

    OpenAIRE

    Odom, Erika C.; Vernon-Feagans, Lynne; Crouter, Ann C.

    2013-01-01

    In this study, observed maternal positive engagement and perception of work-family spillover were examined as mediators of the association between maternal nonstandard work schedules and children’s expressive language outcomes in 231 African American families living in rural households. Mothers reported their work schedules when their child was 24 months of age and children’s expressive language development was assessed during a picture book task at 24 months and with a standardized assessmen...

  2. [Work schedule of electric welders in heating microclimate].

    Science.gov (United States)

    Sorokin, G A; Frolova, N M

    2010-01-01

    The authors present results of specified hygienically justified timing regulations for setting the variants of work and rest modes within electric welders shift, who work in various postures with variable visual strain while welding in heating microclimate.

  3. Teachers' Work and Innovation in Alternative Schools

    Science.gov (United States)

    Bascia, Nina; Maton, Rhiannon

    2016-01-01

    Toronto boasts a large and diverse system of public alternative schools: schools where democratic practices, student access and a commitment to public education are fundamental. There are academic schools; schools with thematically focused curricula; schools driven by social movement principles such as antiracism and global education; schools for…

  4. The relationship between shift work schedules and spillover in a sample of nurses.

    Science.gov (United States)

    Kunst, Jonas Rønningsdalen; Løset, Gøril Kvamme; Hosøy, Daniel; Bjorvatn, Bjørn; Moen, Bente E; Magerøy, Nils; Pallesen, Ståle

    2014-01-01

    The aim of the present study was to estimate spillover effects between the work and the family sphere in a sample of nurses (N = 2058). Hierarchical regression analyses investigated whether shift work schedules were associated with negative or positive spillover, both from family to work and vice versa, controlling for demographic factors, job demands and decision latitude. With daytime work as a reference group, all types of shift work (day and evening shift, night shift only and rotating 3 shift) were associated with higher negative work-to-family spillover. Night work was associated with significantly less negative family-to-work spillover. None of the different shift work schedules were related to any type of positive spillover. The results indicate that working outside of daytime hours is less compatible with workers' family lives, compared to working ordinary day shifts. On the other hand, working night shifts only was associated with reduced negative family-to-work spillover.

  5. Non-standard work schedules, gender, and parental stress

    Czech Academy of Sciences Publication Activity Database

    Lozano, M.; Hamplová, Dana; Le Bourdais, C.

    2016-01-01

    Roč. 34, č. 9 (2016), s. 259-284 ISSN 1435-9871 R&D Projects: GA ČR(CZ) GA14-15008S Institutional support: RVO:68378025 Keywords : stress * employment * non-standard work hours Subject RIV: AO - Sociology, Demography Impact factor: 1.320, year: 2016 http://www.demographic-research.org/volumes/vol34/9/default.htm

  6. Non-standard work schedules, gender, and parental stress

    Czech Academy of Sciences Publication Activity Database

    Lozano, M.; Hamplová, Dana; Le Bourdais, C.

    2016-01-01

    Roč. 34, č. 9 (2016), s. 259-284 ISSN 1435-9871 R&D Projects: GA ČR(CZ) GA14-15008S Institutional support: RVO:68378025 Keywords : stress * employment * non-standard work hours Subject RIV: AO - Sociology, Demography Impact factor: 1.320, year: 2016 http://www.demographic-research.org/volumes/vol34/9/ default .htm

  7. Use of Complementary and Alternative Medicine for Work Related ...

    African Journals Online (AJOL)

    Conclusion: Complementary and alternative medicine therapies may improve quality of life, reduce work disruptions and enhance job satisfaction for dentists who suffer from work-related musculoskeletal disorders. It is important that dentists incorporate complementary and alternative medicine strategies into practice to ...

  8. Parents' nonstandard work schedules and child well-being: a critical review of the literature.

    Science.gov (United States)

    Li, Jianghong; Johnson, Sarah E; Han, Wen-Jui; Andrews, Sonia; Kendall, Garth; Strazdins, Lyndall; Dockery, Alfred

    2014-02-01

    This paper provides a comprehensive review of empirical evidence linking parental nonstandard work schedules to four main child developmental outcomes: internalizing and externalizing problems, cognitive development, and body mass index. We evaluated the studies based on theory and methodological rigor (longitudinal data, representative samples, consideration of selection and information bias, confounders, moderators, and mediators). Of 23 studies published between 1980 and 2012 that met the selection criteria, 21 reported significant associations between nonstandard work schedules and an adverse child developmental outcome. The associations were partially mediated through parental depressive symptoms, low quality parenting, reduced parent-child interaction and closeness, and a less supportive home environment. These associations were more pronounced in disadvantaged families and when parents worked such schedules full time. We discuss the nuance, strengths, and limitations of the existing studies, and propose recommendations for future research.

  9. Efficient Work Team Scheduling: Using Psychological Models of Knowledge Retention to Improve Code Writing Efficiency

    Directory of Open Access Journals (Sweden)

    Michael J. Pelosi

    2014-12-01

    Full Text Available Development teams and programmers must retain critical information about their work during work intervals and gaps in order to improve future performance when work resumes. Despite time lapses, project managers want to maximize coding efficiency and effectiveness. By developing a mathematically justified, practically useful, and computationally tractable quantitative and cognitive model of learning and memory retention, this study establishes calculations designed to maximize scheduling payoff and optimize developer efficiency and effectiveness.

  10. Scheduling the resident 80-hour work week: an operations research algorithm.

    Science.gov (United States)

    Day, T Eugene; Napoli, Joseph T; Kuo, Paul C

    2006-01-01

    The resident 80-hour work week requires that programs now schedule duty hours. Typically, scheduling is performed in an empirical "trial-and-error" fashion. However, this is a classic "scheduling" problem from the field of operations research (OR). It is similar to scheduling issues that airlines must face with pilots and planes routing through various airports at various times. The authors hypothesized that an OR approach using iterative computer algorithms could provide a rational scheduling solution. Institution-specific constraints of the residency problem were formulated. A total of 56 residents are rotating through 4 hospitals. Additional constraints were dictated by the Residency Review Committee (RRC) rules or the specific surgical service. For example, at Hospital 1, during the weekday hours between 6 am and 6 pm, there will be a PGY4 or PGY5 and a PGY2 or PGY3 on-duty to cover Service "A." A series of equations and logic statements was generated to satisfy all constraints and requirements. These were restated in the Optimization Programming Language used by the ILOG software suite for solving mixed integer programming problems. An integer programming solution was generated to this resource-constrained assignment problem. A total of 30,900 variables and 12,443 constraints were required. A total of man-hours of programming were used; computer run-time was 25.9 hours. A weekly schedule was generated for each resident that satisfied the RRC regulations while fulfilling all stated surgical service requirements. Each required between 64 and 80 weekly resident duty hours. The authors conclude that OR is a viable approach to schedule resident work hours. This technique is sufficiently robust to accommodate changes in resident numbers, service requirements, and service and hospital rotations.

  11. Application Of The Work Breakdown Structure In Determining Cost Buffers In Construction Schedules

    Directory of Open Access Journals (Sweden)

    Połoński M.

    2015-03-01

    Full Text Available The paper presents methods of determining the location of cost buffers and corresponding contingency costs in the CPM schedule based on its work breakdown structure. Application of correctly located cost buffers with appropriately established reserve costs is justified by the common overrunning of scheduled costs in construction projects. Interpolated cost buffers (CB as separate tasks have been combined with relevant summary tasks by the start–to–start (SS relationship, whereas the time of their execution has been dynamically connected with the time of accomplishment of particular summary tasks using the “paste connection” option. Besides cost buffers linked with the group of tasks assigned to summary tasks, a definition of the cost buffer for the entire project (PCB has been proposed, i.e. as one initial task of the entire project. Contingency costs corresponding to these buffers, depending on the data that the planner has at his disposal, can be determined using different methods, but always depend on the costs of all tasks protected by each buffer. The paper presents an exemplary schedule for a facility and the method of determining locations and cost for buffers CB and PCB, as well as their influence on the course of the curve illustrating the budgeted cost of work scheduled (BCWS. The proposed solution has been adjusted and presented with consideration of the possibilities created by the scheduling software MS Project, though its general assumptions may be implemented with application of other similar specialist tools.

  12. Investigation of alternative work zone merging sign configurations.

    Science.gov (United States)

    2013-12-01

    This study investigated the effect of an alternative merge sign configuration within a freeway work zone. In this alternative : configuration, the graphical lane closed sign from the MUTCD was compared with a MERGE/arrow sign on one side and a : RIGH...

  13. Determination of Work-Rest Schedules Based on Physical Workload Among Bakers in Ahvaz, Iran

    Directory of Open Access Journals (Sweden)

    Davood Afshari

    2016-09-01

    Full Text Available Background Bakery workers due to exposure to radiant heat and doing manual labor are at risk of heat-related illnesses and musculoskeletal disorders Objectives The current study aimed to determine the appropriate work-rest time interval using two indexes of wet bulb globe temperature (WBGT and relative heart rate (RHR. Methods It was an analytical and descriptive research. Heart rate of workers was continuously recorded to achieve the physiological monitoring and the obtained information was used to determine the work difficulty and physical workload. The ratio of heat stress and RHR was measured using the WBGT and polar team pro device, respectively. Work-rest schedules were detected through the heart rate reserve and heat stress indexes. The level of significance was α = 0.05. Results Physical workload based on heart rate was estimated light to moderate in bakery workers. Suitable work-rest schedule for all bakery workers according to WBGT index was 25% work-75% rest and based on heart rate reserve index in half of the workers was 50% work-50% rest, and in the other half of the bakery workers was continuous work without rest. According to Kappa test, there was no agreement between the two methods of heat stress index and heart rate reserve to determine the work-rest schedules of workers (P < 0.001. Conclusions Physical workloads on the basis of heart rate were light for all workers except the workers of Tanoury who had moderate workload. Meanwhile, determining the work-rest schedule was different using the two indexes. The heart rate reserve index represents the physiological status of individual during the work and states the ratio of physical workload more precisely.

  14. Chronic Disease Risks From Exposure to Long-Hour Work Schedules Over a 32-Year Period.

    Science.gov (United States)

    Dembe, Allard E; Yao, Xiaoxi

    2016-09-01

    This study aims at evaluating the chronic disease risk related to prolonged work in long-hour schedules for eight major chronic diseases: heart disease, non-skin cancer, arthritis, diabetes, chronic lung disease, asthma, chronic depression, and hypertension. The study used data from the National Longitudinal Survey of Youth, 1979 covering 32 years of job history (1978 to 2009) for 7492 respondents. Logistic regression analyses were performed to test the relationship between average weekly work hours, and the reported prevalence of those conditions for each individual. Regularly working long hours over 32 years was significantly associated with elevated risks of heart disease, non-skin cancer, arthritis, and diabetes. The observed risk was much larger among women than among men. Working long-hour schedules over many years increases the risk for some specific chronic diseases, especially for women.

  15. Mothers’ non-standard working schedules and family time : enhancing regularity and togetherness

    OpenAIRE

    Murtorinne-Lahtinen, Minna; Moilanen, Sanna; Tammelin, Mia; Rönkä, Anna; Laakso, Marja-Leena

    2016-01-01

    Purpose – The purpose of this paper is to investigate Finnish working mothers’ experiences of the effects of non-standard working schedules (NSWS) on family time in two family forms, coupled and lone-parent families. Furthermore the aim is to find out what meanings mothers with NSWS attached to family time paying particular attention to the circumstances in which mothers experienced NSWS positively. Design/methodology/approach – Thematic analysis of 20 semi-structured interviews was...

  16. Work schedule, sleep duration, insomnia, and risk of fatal prostate cancer.

    Science.gov (United States)

    Gapstur, Susan M; Diver, W Ryan; Stevens, Victoria L; Carter, Brian D; Teras, Lauren R; Jacobs, Eric J

    2014-03-01

    Studies of breast cancer in women and laboratory studies provide evidence that shift work involving circadian rhythm disruption is a probable human carcinogen. However, evidence linking shift work and other circadian disruption factors to prostate cancer risk is limited. To examine associations of work schedule (i.e., rotating shift work, fixed night and fixed afternoon/evening shift work); sleep duration; and insomnia frequency with prostate cancer mortality. The Cancer Prevention Study-II is a large prospective cohort study of U.S. adults. Work schedule, sleep duration, insomnia frequency, and other information was self-reported in 1982. Among 305,057 employed men, aged ≥29 years who were cancer free at baseline, there were 4974 prostate cancer deaths during follow-up through 2010. In 2013, multivariable-adjusted relative risks (RRs) and 95% CIs were computed using Cox proportional hazards regression. Work schedule and insomnia frequency were not associated with risk of fatal prostate cancer. Short sleep duration was associated with higher risk of prostate cancer during the first 8 years of follow-up, compared to 7 hours/night, the RRs (95% CIs) for 3-5 and 6 hours/night were 1.64 (1.06, 2.54), and 1.28 (0.98, 1.67), respectively. There was no association between sleep duration and fatal prostate cancer during later follow-up. These results do not support associations of work schedule or insomnia frequency with prostate cancer mortality. The association between short sleep duration and higher risk of fatal prostate cancer only during the first 8 years of follow-up suggests that short sleep duration could affect later stages of prostate carcinogenesis. Copyright © 2014 American Journal of Preventive Medicine. Published by Elsevier Inc. All rights reserved.

  17. The effect of alternative work arrangements on women's well-being: a demand-control model.

    Science.gov (United States)

    Kelloway, E K; Gottlieb, B H

    1998-01-01

    The growth of women's participation in the labor force and evidence of the conflict they experience between job and family demands have spurred many employers to introduce alternative work arrangements such as flextime, job sharing, and telecommuting. Drawing on data gained from a sample of women (N = 998) in two large Canadian organizations, this study evaluates two mediational models of the impact of alternative work arrangements on women's stress and family role competence. Specifically, it tests and finds support for the hypotheses that (a) work arrangements involving scheduling flexibility (telecommuting and flextime) promote these aspects of women's well-being by increasing their perceived control over their time, and (b) arrangements involving reduced hours of employment (part-time employment and job sharing) promote well-being by reducing perceived job overload. Discussion of these findings centers on their implications for employed women, their employers, and future research.

  18. 40 CFR 35.4161 - Does the TAG application process affect the schedule for work at my site?

    Science.gov (United States)

    2010-07-01

    ... Assistance How to Apply for A Tag § 35.4161 Does the TAG application process affect the schedule for work at... 40 Protection of Environment 1 2010-07-01 2010-07-01 false Does the TAG application process affect the schedule for work at my site? 35.4161 Section 35.4161 Protection of Environment ENVIRONMENTAL...

  19. Optimal Scheduling of Railway Track Possessions in Large-Scale Projects with Multiple Construction Works

    DEFF Research Database (Denmark)

    Li, Rui; Roberti, Roberto

    2017-01-01

    This paper addresses the railway track possession scheduling problem (RTPSP), where a large-scale railway infrastructure project consisting of multiple construction works is to be planned. The RTPSP is to determine when to perform the construction works and in which track possessions while...... by solving a mixed-integer linear-programming model for the given track blocking proposal. The proposed approach is tested on a real-life case study from the Danish railway infrastructure manager. The results show that, in 2 h of computing time, the approach is able to provide solutions that are within 0...

  20. Work schedule influence on sleep habits in elementary and high school teachers according to chronotype

    Directory of Open Access Journals (Sweden)

    Jane Carla de Souza

    2014-09-01

    Full Text Available The influence of work schedule on sleep habits and quality, and daytime sleepiness according to individual preferences in sleep schedules was assessed in 131 elementary and high school teachers through questionnaires. Teachers who initiate classes around 7:00 hr wake up earlier and show more frequency of poor sleep quality than those who start classes in the afternoon. Between them, those who have a preference for intermediate or later hours for sleep are more irregular in their wake up schedules and increase their sleep duration on the weekend compared to those with earlier sleep preferences. On the other hand, working only in the afternoon seems to provide better sleep/awake conditions for teachers, because they keep the same sleep duration during the week and on the weekend, and they are diagnosed with less daytime sleepiness. Therefore, the discussion of school start times, originally proposed for adolescents, needs to be magnified to teachers, contributing to improvement of sleep habits and life quality in school environments.

  1. Putting ROSE to Work: A Proposed Application of a Request-Oriented Scheduling Engine for Space Station Operations

    Science.gov (United States)

    Jaap, John; Muery, Kim

    2000-01-01

    Scheduling engines are found at the core of software systems that plan and schedule activities and resources. A Request-Oriented Scheduling Engine (ROSE) is one that processes a single request (adding a task to a timeline) and then waits for another request. For the International Space Station, a robust ROSE-based system would support multiple, simultaneous users, each formulating requests (defining scheduling requirements), submitting these requests via the internet to a single scheduling engine operating on a single timeline, and immediately viewing the resulting timeline. ROSE is significantly different from the engine currently used to schedule Space Station operations. The current engine supports essentially one person at a time, with a pre-defined set of requirements from many payloads, working in either a "batch" scheduling mode or an interactive/manual scheduling mode. A planning and scheduling process that takes advantage of the features of ROSE could produce greater customer satisfaction at reduced cost and reduced flow time. This paper describes a possible ROSE-based scheduling process and identifies the additional software component required to support it. Resulting changes to the management and control of the process are also discussed.

  2. A sealed turbo-alternator using any working-fluid

    International Nuclear Information System (INIS)

    Chollet, Maurice.

    1973-01-01

    The invention relates to a sealed turbo-alternator operating with a working fluid other than water. The turbo-alternator and the feed and lubricating pumps thereof are housed in a sealed casing. The latter constitutes, with the heat pump and the heat sink, a sealed enclosure containing the working and lubricating fluid. The alternator, which comprises neither collector nor brushes, is dipped in the working fluid vapor. Electric energy leaves the sealed enclosure through insulating sealed passager. In view of the absence of leakage it is possible to select (e.g. among freons) a working fluid well suited to the temperature differential between the heat source and the heat sink, and, accordingly to use temperature drops which could be too small in the case of steam. The various applications are as follows: recovery of calories at the exhaust of diesels and of gas turbines or in the cooling water of diesels; equipment of isotopic generators; recovery of calories from factory waste thrown into rivers (anti-pollution effect in view of the lowering of water temperature); non-polluting engine for special electrical vehicles [fr

  3. Work Scheduling by Use of Worker Model in Consideration of Learning by On-The-Job Training

    Science.gov (United States)

    Tateno, Toshitake; Shimizu, Keiko

    This paper deals with a method of scheduling manual work in consideration of learning by on-the-job training (OJT). In skilled work such as maintenance of trains and airplanes, workers must learn many tasks by OJT. While the work processing time of novice workers is longer than that of experts, the time will be reduced with repeated OJT. Therefore, OJT is important for maintaining the skill level and the long-term work efficiency of an organization. In order to devise a schedule considering OJT, the scheduler must incorporate a management function of workers to trace dynamically changing work experience. In this paper, after the relationship between scheduling problems and worker management problems is defined, a simulation method, in which a worker model and an agent-based mechanism are utilized, is proposed to derive the optimal OJT strategy toward high long-term performance. Finally, we present some case studies showing the effectiveness of OJT planning based on the simulation.

  4. Anatomy of Alternating Quantifier Satisfiability (Work in progress)

    DEFF Research Database (Denmark)

    Dung, Phan Anh; Bjørner, Nikolaj; Monniaux, David

    We report on work in progress to generalize an algorithm recently introduced in [10] for checking satisfiability of formulas with quantifier alternation. The algorithm uses two auxiliary procedures: a procedure for producing a candidate formula for quantifier elimination and a procedure for elimi......We report on work in progress to generalize an algorithm recently introduced in [10] for checking satisfiability of formulas with quantifier alternation. The algorithm uses two auxiliary procedures: a procedure for producing a candidate formula for quantifier elimination and a procedure...... for eliminating or partially eliminating quantifiers. We also apply the algorithm for Presburger Arithmetic formulas and evaluate it on formulas from a model checker for Duration Calculus [8]. We report on experiments on different variants of the auxiliary procedures. So far, there is an edge to applying SMT...

  5. A systematic review of the sleep, sleepiness, and performance implications of limited wake shift work schedules.

    Science.gov (United States)

    Short, Michelle A; Agostini, Alexandra; Lushington, Kurt; Dorrian, Jillian

    2015-09-01

    The aim of this review was to identify which limited wake shift work schedules (LWSW) best promote sleep, alertness, and performance. LWSW are fixed work/rest cycles where the time-at-work does is ≤8 hours and there is >1 rest period per day, on average, for ≥2 consecutive days. These schedules are commonly used in safety-critical industries such as transport and maritime industries. Literature was sourced using PubMed, Embase, PsycInfo, Scopus, and Google Scholar databases. We identified 20 independent studies (plus a further 2 overlapping studies), including 5 laboratory and 17 field-based studies focused on maritime watch keepers, ship bridge officers, and long-haul train drivers. The measurement of outcome measures was varied, incorporating subjective and objective measures of sleep: sleep diaries (N=5), actigraphy (N=4), and polysomnography, (N=3); sleepiness: Karolinska Sleepiness Scale (N=5), visual analog scale (VAS) alertness (N=2) and author-derived measures (N=2); and performance: Psychomotor Vigilance Test (PVT) (N=5), Reaction Time or Vigilance tasks (N=4), Vector and Letter Cancellation Test (N=1), and subjective performance (N=2). Of the three primary rosters examined (6 hours-on/6 hours-off, 8 hours-on/8 hours-off and 4 hours-on/8 hours-off), the 4 hours-on/8 hours-off roster was associated with better sleep and lower levels of sleepiness. Individuals working 4 hours-on/8 hours-off rosters averaged 1 hour more sleep per night than those working 6 hours-on/6 hours-off and 1.3 hours more sleep than those working 8 hours-on/8 hours-off (Pworkplace as they facilitate at least some sleep during the biological night and minimize deficits associated with time-on-shift with shorter shifts. Overall, the 4 hour-on/8 hour-off roster best promoted sleep and minimized sleepiness compared to other LWSW schedules. Nevertheless, and considering the safety-critical nature of industries which employ LWSW, the limited literature needs to be greatly expanded with

  6. 'Business before pleasure': the golden rule of sex work, payment schedules and gendered experiences of violence.

    Science.gov (United States)

    Manning, Elizabeth; Bungay, Vicky

    2017-03-01

    A widespread rule of sex work is that payment occurs before service provision. Drawing on a subset of data collected as part of an ethnographic study conducted in metro Vancouver, Canada, this paper explores the temporal and gendered connections between payment and financial violence in a semi-criminalised indoor sex industry. A detailed examination of the timing of payment with 51 independent indoor sex workers reveals the gendered nature of the violence and its direct connection to anti-violence strategies indoor sex workers employ. We found that women (including transgender women) (n = 26) and men (n = 25) use payment schedules to minimise potential violence, but in divergent ways. Sex workers adhere to, negotiate and reject the golden rule of payment in advance based on different experiences of gendered violence. Through a gendered relational analysis, we show the contextual relationship between men and women as they negotiate payment schedules in their sex work interactions. These findings offer insight into the significance that the timing of payment has in sex workers' anti-violence practices.

  7. IRAG working group 5. Other assays. Interagency Regulatory Alternatives Group.

    Science.gov (United States)

    Curren, R D; Sina, J F; Feder, P; Kruszewski, F H; Osborne, R; Régnier, J F

    1997-01-01

    As part of the Interagency Regulatory Alternatives Group (IRAG) program to evaluate the state of the art in the development of alternative (non-whole animal) eye irritation tests, academic and industrial organizations were invited to submit in vitro eye irritation data generated in their laboratories to one of several working groups for review. The assays reviewed in this report (from Working Group 5. "Other Assays") were the EYTEX assay, tissue equivalent assay, a cytotoxicity assay using three-dimensional human fibroblast constructs, the Microtox assay, and other miscellaneous assays. Each submission consisted of raw data for chemicals and products tested, a description of the methodology, and an analysis (generally by regression analysis and Pearson's correlation coefficient) for the performance of the in vitro test relative to its ability to predict individual ocular tissue scores or total ocular score. In vivo data were generated according to the scoring methods proposed by Draize. Working Group 5 evaluated the submissions and commented on the utility of the assays. The variability of the in vivo data made conclusions difficult in many situations. Most of these assays were deemed useful (within limited chemical classes) for screening purposes or for use in conjunction with other toxicological information.

  8. 76 FR 32409 - Medicare Program; Five-Year Review of Work Relative Value Units Under the Physician Fee Schedule

    Science.gov (United States)

    2011-06-06

    ... Medicare & Medicaid Services 42 CFR Part 414 Medicare Program; Five-Year Review of Work Relative Value...; Five-Year Review of Work Relative Value Units Under the Physician Fee Schedule AGENCY: Centers for... proposed revisions to work relative value units (RVUs) and corresponding changes to the practice expense...

  9. Meta-heuristic algorithms for parallel identical machines scheduling problem with weighted late work criterion and common due date.

    Science.gov (United States)

    Xu, Zhenzhen; Zou, Yongxing; Kong, Xiangjie

    2015-01-01

    To our knowledge, this paper investigates the first application of meta-heuristic algorithms to tackle the parallel machines scheduling problem with weighted late work criterion and common due date ([Formula: see text]). Late work criterion is one of the performance measures of scheduling problems which considers the length of late parts of particular jobs when evaluating the quality of scheduling. Since this problem is known to be NP-hard, three meta-heuristic algorithms, namely ant colony system, genetic algorithm, and simulated annealing are designed and implemented, respectively. We also propose a novel algorithm named LDF (largest density first) which is improved from LPT (longest processing time first). The computational experiments compared these meta-heuristic algorithms with LDF, LPT and LS (list scheduling), and the experimental results show that SA performs the best in most cases. However, LDF is better than SA in some conditions, moreover, the running time of LDF is much shorter than SA.

  10. Location-based Scheduling

    DEFF Research Database (Denmark)

    Andersson, Niclas; Christensen, Knud

    the predominant scheduling method since it was introduced in the late 1950s. Over the years, CPM has proven to be a very powerful technique for planning, scheduling and controlling projects, which among other things is indicated by the development of a large number of CPM-based software applications available...... on the market. However, CPM is primarily an activity based method that takes the activity as the unit of focus and there is criticism raised, specifically in the case of construction projects, on the method for deficient management of construction work and continuous flow of resources. To seek solutions...... to the identified limitations of the CPM method, an alternative planning and scheduling methodology that includes locations is tested. Location-based Scheduling (LBS) implies a shift in focus, from primarily the activities to the flow of work through the various locations of the project, i.e. the building. LBS uses...

  11. A framework for using ant colony optimization to schedule environmental flow management alternatives for rivers, wetlands, and floodplains

    Science.gov (United States)

    Szemis, J. M.; Maier, H. R.; Dandy, G. C.

    2012-08-01

    Rivers, wetlands, and floodplains are in need of management as they have been altered from natural conditions and are at risk of vanishing because of river development. One method to mitigate these impacts involves the scheduling of environmental flow management alternatives (EFMA); however, this is a complex task as there are generally a large number of ecological assets (e.g., wetlands) that need to be considered, each with species with competing flow requirements. Hence, this problem evolves into an optimization problem to maximize an ecological benefit within constraints imposed by human needs and the physical layout of the system. This paper presents a novel optimization framework which uses ant colony optimization to enable optimal scheduling of EFMAs, given constraints on the environmental water that is available. This optimization algorithm is selected because, unlike other currently popular algorithms, it is able to account for all aspects of the problem. The approach is validated by comparing it to a heuristic approach, and its utility is demonstrated using a case study based on the Murray River in South Australia to investigate (1) the trade-off between plant recruitment (i.e., promoting germination) and maintenance (i.e., maintaining habitat) flow requirements, (2) the trade-off between flora and fauna flow requirements, and (3) a hydrograph inversion case. The results demonstrate the usefulness and flexibility of the proposed framework as it is able to determine EFMA schedules that provide optimal or near-optimal trade-offs between the competing needs of species under a range of operating conditions and valuable insight for managers.

  12. Leaseback: An alternative source to raise company working capital

    Directory of Open Access Journals (Sweden)

    Laušević Ljubica

    2014-01-01

    Full Text Available This paper offers a description, regulatory framework and the manner of implementation of the leaseback as an alternative manner of raising working capital for companies with a large number and type of users. Leaseback has experienced an explosive growth in Europe, in the first decade of this century, especially during the years of economic prosperity. The value of leaseback in Europe has grown from 6.9 billion EUR in 2004, up to 46 billion EUR in 2007, i.e. during the four years the value was increased for 567%. Leaseback has shown itself to be, according to the analyses made, an 'ideal' manner of financing based on sale-and-leaseback of real estate. Capital that is 'immobilised' on long-term basis, through the leaseback regains its quality of capital ready to be engaged in current activities, i.e. projects and programmes of companies that are making high earnings. The objective of this work is to draw the attention, on the basis of a comprehensive theoretical presentation, empirical analyses and positive world practices, to this, in our business circumstances, a completely novel manner of financing, in the context of raising additional working capital through the inflow of both the domestic and of the foreign capital in Serbia. In order to achieve full implementation of this type of financing, it is necessary to overcome a number of constraints and provide regulatory framework, developed investment funds for investment in real estate, and a properly set in place cadastre register.

  13. A Work-Demand Analysis Compatible with Preemption-Aware Scheduling for Power-Aware Real-Time Tasks

    Directory of Open Access Journals (Sweden)

    Da-Ren Chen

    2013-01-01

    Full Text Available Due to the importance of slack time utilization for power-aware scheduling algorithms,we propose a work-demand analysis method called parareclamation algorithm (PRA to increase slack time utilization of the existing real-time DVS algorithms. PRA is an online scheduling for power-aware real-time tasks under rate-monotonic (RM policy. It can be implemented and fully compatible with preemption-aware or transition-aware scheduling algorithms without increasing their computational complexities. The key technique of the heuristics method doubles the analytical interval and turns the deferrable workload out the potential slack time. Theoretical proofs show that PRA guarantees the task deadlines in a feasible RM schedule and takes linear time and space complexities. Experimental results indicate that the proposed method combining the preemption-aware methods seamlessly reduces the energy consumption by 14% on average over their original algorithms.

  14. "Home is at work and work is at home": telework and individuals who use augmentative and alternative communication.

    Science.gov (United States)

    McNaughton, David; Rackensperger, Tracy; Dorn, Dana; Wilson, Natasha

    2014-01-01

    Telework, the use of distance communication technologies to participate in the workforce, has been suggested as a promising employment strategy for individuals with disabilities. The goal of this study was to obtain a better understanding of the benefits and negative impacts of telework, as well as the supports and challenges to telework activities, for persons who use augmentative and alternative communication (AAC). This study used a series of focus group discussions, conducted on the internet, to examine the employment experiences of nine individuals with disabilities who used AAC and who held jobs that involved the use of telework. Four major themes emerged from the discussion: (a) benefits of telework, (b) negative impacts of telework, (c) strategies for addressing negative impacts of telework, and (d) recommendations for improving employment outcomes for individuals who use AAC. In summary, while participants identified the elimination of travel time and flexible work schedules as key strengths of telework, concerns were expressed regarding feelings of isolation and the difficulty in separating home and work environments. The participants also emphasized the important role of educational programs in supporting the acquisition of literacy and self-advocacy skills, and the need for post-secondary programs to support the school-to-workplace transition.

  15. Does non-standard work mean non-standard health? Exploring links between non-standard work schedules, health behavior, and well-being.

    Science.gov (United States)

    Winkler, Megan R; Mason, Susan; Laska, Melissa N; Christoph, Mary J; Neumark-Sztainer, Dianne

    2018-04-01

    The last century has seen dramatic shifts in population work circumstances, leading to an increasing normalization of non-standard work schedules (NSWSs), defined as non-daytime, irregular hours. An ever-growing body of evidence links NSWSs to a host of non-communicable chronic conditions; yet, these associations primarily concentrate on the physiologic mechanisms created by circadian disruption and insufficient sleep. While important, not all NSWSs create such chronobiologic disruption, and other aspects of working time and synchronization could be important to the relationships between work schedules and chronic disease. Leveraging survey data from Project EAT, a population-based study with health-related behavioral and psychological data from U.S. adults aged 25-36 years, this study explored the risks for a broad range of less healthful behavioral and well-being outcomes among NSWS workers compared to standard schedule workers (n = 1402). Variations across different NSWSs (evening, night/rotating, and irregular schedules) were also explored. Results indicated that, relative to standard schedule workers, workers with NSWSs are at increased risk for non-optimal sleep, substance use, greater recreational screen time, worse dietary practices, obesity, and depression. There was minimal evidence to support differences in relative risks across workers with different types of NSWSs. The findings provide insight into the potential links between NSWSs and chronic disease and indicate the relevancy social disruption and daily health practices may play in the production of health and well-being outcomes among working populations.

  16. Shiftworking families: parents' working schedule and sleep patterns of adolescents attending school in two shifts

    Directory of Open Access Journals (Sweden)

    Biserka Radoševic-Vidacek

    2004-12-01

    Full Text Available OBJECTIVE: To explore whether parents' engagement in shift work affects the sleep habits of their adolescent children who attend school in two shifts. METHODS: The data were drawn from an extensive survey of sleep and daytime functioning of adolescents attending school one week in the morning and the other in the afternoon. The participants were 1,386 elementary and high school students (11-18 years old whose parents were both employed. The data were analyzed using MANOVA, with parents' work schedule, adolescents' gender and type of school as between-subject factors. RESULTS: Parents' working schedule significantly affected the sleep patterns of high school adolescents. When attending school in the morning, adolescents whose parents were both day workers woke up somewhat later than adolescents with one shiftworking parent. In addition, they slept longer than adolescents whose parents were both shift workers. On weekends, adolescents whose parents both worked during the day went to bed earlier than adolescents whose parents were both shiftworkers. They also had smaller bedtime delay on weekends with respect to both morning and afternoon shifts than adolescents for whom one or both parents worked shifts. A significant interaction between parents' working schedule, adolescents' gender and type of school was found for sleep extension on weekends after afternoon shift school. CONCLUSIONS: Parental involvement in shift work has negative effects on the sleep of high school adolescents. It contributes to earlier wake-up time and shorter sleep in a week when adolescents attend school in the morning, as well as to greater bedtime irregularity.OBJETIVO: Investigar se a ocupação de pais com o trabalho em turnos interfere nos hábitos de sono dos filhos adolescentes que freqüentam a escola em dois períodos distintos. MÉTODOS: Os dados foram coletados em uma extensa pesquisa sobre sono e atividades diurnas de adolescentes que freqüentavam a escola no

  17. Strategies used by women workers to reconcile family responsibilities with atypical work schedules in the service sector.

    Science.gov (United States)

    Barthe, B; Messing, K; Abbas, L

    2011-01-01

    Workers' attempts to accommodate family needs may be considered illegitimate in the paid work sphere. Their attempts at work-family balancing (WFB) in that sphere can remain invisible, even when those attempts require considerable energy. Since identification of WFB strategies can potentially lead to suggestions to improve management practices, we report an attempt to find them in the work sphere. 14 care aides in a Québec residence for seniors and 2~schedule managers were recruited. Qualitative ergonomic analysis was employed. 24 hours observation; interviews of nursing and human resources staff; qualitative ergonomic analysis by two researchers; feedback collected from meetings with management and union. Strategies for schedule choice were compared between care aides with heavier vs. lighter family responsibilities. For workers with heavier family responsibilities, choice of work schedules was almost entirely conditioned by family considerations, leaving little leeway to manage workers' own health protection. Family constraints affected activity at work, and strategies for handling family constraints could potentially be affected by changes in work organization. Managers should encourage full discussion of work-family balancing strategies if they wish to adapt their working conditions to the workers, and ergonomists should include this balancing as a facet of work activity, despite possible negative consequences.

  18. Actigraph measures of sleep among female hospital employees working day or alternating day and night shifts.

    Science.gov (United States)

    Korsiak, Jill; Tranmer, Joan; Leung, Michael; Borghese, Michael M; Aronson, Kristan J

    2017-07-14

    Sleep disturbance is common among shift workers, and may be an important factor in the effect of shift work on chronic disease development. In this cross-sectional study, we described sleep patterns of 294 female hospital workers (142 alternating day-night shift workers, 152 day workers) and determined associations between shift work and sleep duration. Rest-activity cycles were recorded with the ActiGraph GT3X+ for 1 week. Analyses were stratified by chronotype of shift workers. Using all study days to calculate average sleep duration, shift workers slept approximately 13 min less than day workers during main sleep periods, while 24-h sleep duration did not differ between day workers and shift workers. Results from age-adjusted models demonstrated that all shift workers, regardless of chronotype, slept 20-30 min less than day workers on day shifts during main and total sleep. Early and intermediate chronotypes working night shifts slept between 114 and 125 min less than day workers, both with regard to the main sleep episode and 24-h sleep duration, while the difference was less pronounced among late chronotypes. When sleep duration on free days was compared between shift workers and day workers, only shift workers with late chronotypes slept less, by approximately 50 min, than day workers during main sleep. Results from this study demonstrate how an alternating day-night shift work schedule impacts sleep negatively among female hospital workers, and the importance of considering chronotype in sleep research among shift workers. © 2017 European Sleep Research Society.

  19. 49 CFR Table 3 of Subpart B to... - Alternative Schedule for Application of Retroreflective Material to Freight Cars per § 224.107(a...

    Science.gov (United States)

    2010-10-01

    ... 49 Transportation 4 2010-10-01 2010-10-01 false Alternative Schedule for Application of Retroreflective Material to Freight Cars per § 224.107(a)(2)(ii) 3 Table 3 of Subpart B to Part 224... locomotive not later than nine months after the first biennial inspection performed pursuant to 49 CFR 229.29...

  20. 49 CFR Table 4 of Subpart B to... - Alternative Schedule for Application of Retroreflective Material to Locomotives per § 224.107(b...

    Science.gov (United States)

    2010-10-01

    ... 49 Transportation 4 2010-10-01 2010-10-01 false Alternative Schedule for Application of Retroreflective Material to Locomotives per § 224.107(b)(2)(ii) 4 Table 4 of Subpart B to Part 224 Transportation Other Regulations Relating to Transportation (Continued) FEDERAL RAILROAD ADMINISTRATION, DEPARTMENT OF...

  1. Effects of an alternating work shift on air traffic controllers and the relationship with excessive daytime sleepiness and stress.

    Science.gov (United States)

    Freitas, Ângela M; Portuguez, Mirna Wetters; Russomano, Thaís; Freitas, Marcos de; Silvello, Silvio Luis da Silva; Costa, Jaderson Costa da

    2017-10-01

    To evaluate symptoms of stress and excessive daytime sleepiness (EDS) in air traffic control (ATC) officers in Brazil. Fifty-two ATC officers participated, based at three air traffic control units, identified as A, B and C. Stress symptoms were assessed using the Lipp Inventory of Stress Symptoms for Adults, and EDS by the Epworth Sleepiness Scale. The sample mean age was 37 years, 76.9% of whom were male. Excessive daytime sleepiness was identified in 25% of the ATC officers, with 84.6% of these based at air traffic control unit A, which has greater air traffic flow, operating a 24-hour alternating work shift schedule. A total of 16% of the ATC officers had stress symptoms, and of these, 62% showed a predominance of physical symptoms. The high percentage of ATC officers with EDS identified in group A may be related to chronodisruption due to night work and alternating shifts.

  2. Restless Legs Syndrome/Willis–Ekbom Disease Is Prevalent in Working Nurses, but Seems Not to Be Associated with Shift Work Schedules

    Directory of Open Access Journals (Sweden)

    Siri Waage

    2018-01-01

    Full Text Available Insomnia and excessive sleepiness are among the most commonly reported sleep problems related to shift work. Sleep-related movement disorders have, however, received far less attention in relation to such work schedules. The objective of this study was to investigate the association between different shift work schedules and the prevalence of Restless legs syndrome/Willis–Ekbom disease (RLS/WED in a large sample of Norwegian nurses. Our hypothesis was that shift working nurses would report higher prevalence of RLS/WED compared to day workers. A total of 1,788 nurses with different work schedules (day work, two-shift rotation, night work, three shift rotation participated in a cohort study, started in 2008/2009. Four questions about RLS/WED based on the diagnostic criteria were included in wave 4 (2012. RLS/WED prevalence rates across different shift schedules were explored by the Pearson chi-square test. Logistic regression analysis was used to assess the association between RLS/WED and work schedules and shift work disorder (SWD with adjustment for sex, age, marital status, smoking, and caffeine use. In total, 90.0% of the nurses were females, mean age 36.5 years (SD = 8.6, range 25–67. The overall prevalence of RLS/WED was 26.8%. We found no significant differences between the prevalence of RLS/WED across the different shift schedules, ranging from 23.3% (day work to 29.4% (night work. There was a significant difference (p < 0.001 in the prevalence of RLS/WED between nurses having SWD (33.5% compared to nurses not having SWD (23.8%. SWD remained significantly associated with RLS/WED in the adjusted logistic regression analysis (1.56, CI: 1.24–1.97. This study did not support the hypothesis. RLS/WED was associated with SWD, which might indicate that nurses vulnerable to shift work also are sensitive to other complaints related to a misalignment of the biological clock.

  3. Complementary and alternative medicine for children: does it work?

    OpenAIRE

    Kemper, K

    2001-01-01

    Paediatric use of complementary and alternative medicine is common and increasing, particularly for the sickest children. This review discusses the various options available including dietary supplements, hypnosis, massage, chiropractic, and acupuncture.



  4. Twelve-hour brain lithium concentration in lithium maintenance treatment of manic-depressive disorder: daily versus alternate-day dosing schedule

    DEFF Research Database (Denmark)

    Jensen, H.V.; Plenge, P; Stensgaard, A

    1996-01-01

    The 12-h brain lithium concentration was measured by lithium-7 magnetic resonance spectroscopy in ten manic-depressive patients receiving daily or alternate-day lithium carbonate treatment. The median dose of lithium carbonate was 800 mg in the daily treatment group and 1200 mg in the alternate......-day group. Median 12-h serum lithium concentration in the two groups was 0.86 mmol l-1 and 0.55 mmol l-1, respectively, while the corresponding concentration in brain was 0.67 mmol l-1 and 0.52 mmol l-1, respectively. The 12-h brain lithium concentration was independent of lithium dosing schedule (multiple......-depressive relapse during alternate-day lithium treatment is in our experience 3-fold greater than with daily treatment (at similar mean 12-h serum lithium concentration), the findings suggest that the difference in the prophylactic efficacy of the two dosing schedules is unrelated to differences in the 12-h brain...

  5. Sleep pattern and decision-making in physicians from mobile emergency care service with 12-h work schedules.

    Science.gov (United States)

    Castro, Eleni de Araújo Sales; de Almondes, Katie Moraes

    2018-06-01

    Shift work schedules are biological standpoint worse because compel the body to anticipate periods of wakefulness and sleep and thus eventually cause a disruption of biological rhythms. The objective of this study is to evaluate the sleep pattern and decision-making in physicians working in mobile units of emergency attention undergoing day shift and rotating shift. The study included 26 physicians. The instruments utilized were a sociodemographic questionnaire, the Pittsburgh Sleep Quality Index, the Sleep Habits Questionnaire, the Epworth Sleepiness Scale and Chronotype Identification Questionnaire of Horne-Ostberg, the Iowa Gambling Task (IGT) and hypothetical scenarios of decision-making created according to the Policy-Capturing Technique. For inclusion and exclusion criteria, the participants answered the Chalder Fatigue Scale, the Beck Anxiety Inventory, the Beck Depression Inventory and the Inventory of Stress Symptoms for adults of Lipp. It was found good sleep quality for physicians on day shift schedule and bad sleep quality for physicians on rotating shift schedule. The IGT measure showed no impairment in decision-making, but the hypothetical scenarios revealed impairment decision-making during the shift for both schedules. Good sleep quality was related to a better performance in decision-making. Good sleep quality seems to influence a better performance in decision-making.

  6. Proposal for the completion of outstanding work on the installation scheduling and alignment of the SDC central calorimeter

    International Nuclear Information System (INIS)

    Guarino, V.; Hill, N.; Nasiatka, J.; Petereit, E.; Price, L.

    1993-01-01

    The High Energy Physic Division at Argonne National Laboratory was given the task of developing the procedures, fixtures, and schedules for the final assembly of the barrel and endcap calorimeters for the SDC. The work completed led to some major decision about how and where this assembly work would be done. The primary assembly decision was the feasibility of assembling the major detector components (barrel and endcap sub-assemblies) above ground and lowering them into position in the experimental hall, as opposed to assembling the calorimeter directly in the experimental hall. Due to cost of above ground assembly and schedule changes, the in-hall option was adopted. Although no actual hardware was constructed, many conceptual ideas were formalized and brought to workable solutions as a result of the effort put forth at ANL

  7. For better or worse? Changing shift schedules and the risk of work injury among men and women.

    Science.gov (United States)

    Wong, Imelda S; Smith, Peter M; Mustard, Cameron A; Gignac, Monique Am

    2014-11-01

    The aim of this study was to examine the risk of work injury associated with changes in shift schedules and identify whether work injury risks differ between men and women. Longitudinal panels from the Survey of Labor and Income Dynamics were used to describe work schedule patterns over a 6-year period among a representative sample of Canadian workers (N=19 131). Cox regression was used to estimate the risk of work injury among workers who (i) switched from regular day to nonstandard shifts, (ii) switched from nonstandard to day shifts and (iii) remained in nonstandard shifts, compared with (iv) those who worked regular day shifts only. Gender differences were examined in separate stratified analyses. Adjustments were made for potential respondent and occupational confounders. Increased injury risk was observed among those who: switched from day to nonstandard shifts [hazard ratio (HR) 2.60, 95% confidence interval (95% CI) 1.79-3.77], switched from nonstandard to days (HR 2.36, 95% CI 1.62-3.49), and worked nonstandard shifts only (HR 1.44, 95% CI 1.23-1.70). For women, work injury risk was higher among those who switched shifts (days to nonstandard HR 3.10, 95% CI 1.76-5.46; nonstandard to days HR 2.31, 95% CI 1.36-3.91), or worked nonstandard shifts only (HR 1.85, 95% CI 1.44-2.37) compared to day schedules. However, for men the risk of injury was elevated only among those who switched shifts (days to nonstandard HR 2.18, 95% CI 1.35-3.51; nonstandard to days HR 2.38, 95% CI 1.41-3.95). The only significant difference between men and women were among nonstandard shift workers. Our results suggest that changing shift types may increase work injury risk among men and women, and that the risk remains increased among women who work nonstandard shifts for a prolonged period of time. This highlights the need for awareness and implementation of health and safety programs when workers initially change shift schedules and on a regular basis to maintain worker health.

  8. Alternative Therapies for Gender-based Work Wellness: Perceptions ...

    African Journals Online (AJOL)

    Due to the performance-based demands and competitive work-environment, employees experience high levels of stress. Organizations, world-wide, have established Employee Wellness Programmes (EWPs) to ease the work-pressure syndromes and offer medical/therapeutic services to employees. The article aims to ...

  9. The impact of various work schedules on sleep complaints and minor accidents during work or leisure time: evidence from a national survey.

    Science.gov (United States)

    Chiu, Hsiao-Yean; Tsai, Pei-Shan

    2013-03-01

    To explore the prevalence of insomnia symptoms and excessive daytime sleepiness (EDS) in different work schedules and the impact of shift schedules on the risk of minor accidents during work or leisure time. Using the data from Taiwan Social Development Trend Survey in 2005 (n = 18,794), insomnia symptoms, EDS, and minor accidents were analyzed using descriptive statistics and multivariable logistic regression model. The evening-to-night group had significantly higher prevalence rates of insomnia symptoms. Higher prevalence rate of EDS was presented in both day-to-evening and evening-to-night groups. Adjusting for confounders, the day-to-evening shift had a higher odds ratio of minor accidents as compared with the fixed daytime workers. Extended-shift workers tend to experience insomnia symptoms and EDS and have an increased likelihood of minor accidents.

  10. Changing Workplaces to Reduce Work-Family Conflict: Schedule Control in a White-Collar Organization

    Science.gov (United States)

    Kelly, Erin L.; Moen, Phyllis; Tranby, Eric

    2011-01-01

    Work-family conflicts are common and consequential for employees, their families, and work organizations. Can workplaces be changed to reduce work-family conflict? Previous research has not been able to assess whether workplace policies or initiatives succeed in reducing work-family conflict or increasing work-family fit. Using longitudinal data…

  11. Devising work schedules for a collective: favouring intergenerational collaboration among counsellors in a shelter for female victims of conjugal violence.

    Science.gov (United States)

    Chatigny, Céline

    2011-01-01

    The work activity of counsellors in shelters for female victims of conjugal violence is explored. The consortium of shelters requested the study because of complaints of worker stress, difficulties in management and high employee turnover. This qualitative and participatory community study involved a team of specialists in ergonomics and social work from the Centre de recherche interdisciplinaire sur la biologie, la santé, la sociélté et l'environnement (CINBIOSE), brought together by the Community Outreach Service of Université du Québec à Montréal (UQAM). Presented here are the study findings pertaining to training. Twenty-two semi-structured interviews and 80 hours of observation of work and training were conducted with counsellors from two contrasting shelters. Observations revealed an intense collaborative activity involving communication by many means. Nonetheless, young counsellors interviewed complained of having few opportunities to develop their counselling skills because they were isolated on evening, night and weekend shifts. In collaboration with the ergonomists, one shelter experimented with new ways of devising the work schedule to favour learning and training. By transforming the training mechanism, job status and work schedules, the shelter made the conditions more conducive to the development of counsellors' skills and health, while eliminating turnover for at least the two following years.

  12. Alternative Spaces of "Work" and Inclusion for Disabled People

    Science.gov (United States)

    Hall, Edward; Wilton, Robert

    2011-01-01

    Western governments have emphasized paid work as a key route to social inclusion for disabled people. Although the proportion of disabled people in "mainstream" employment has increased in recent decades, rates remain significantly below those for non-disabled people. Moreover, disabled workers continue to face discrimination and a lack of…

  13. Schedule Control, Supervisor Support and Work Engagement: A Winning Combination for Workers in Hourly Jobs?

    Science.gov (United States)

    Swanberg, Jennifer E.; McKechnie, Sharon P.; Ojha, Mamta U.; James, Jacquelyn B.

    2011-01-01

    The changing natures of both work and the lives of the U.S. workforce have created an array of challenges for organizations attempting to foster work engagement. To accommodate the work and family needs of an increasingly diverse workforce, many firms are offering flexible work solutions to employees. However, the distribution of these types of…

  14. Alternatives for Pragmatic Responses to Group Work Problems

    Directory of Open Access Journals (Sweden)

    Karoly Bozan

    2016-05-01

    Full Text Available Group work can provide a valuable learning experience, one that is especially relevant for those preparing to enter the information system workforce. While much has been discussed about effective means of delivering the benefits of collaborative learning in groups, there are some problems that arise due to pragmatic environmental factors such as the part time work commitments of students. This study has identified a range of problems and reports on a longitudinal Action Research study in two universities (in Australia and the USA. Over three semesters problems were identified and methods trialed using collaborative tools. Several promising solutions are presented to the identified problems. These include the use of Google documents and color to ensure team contributions are more even.

  15. The moderating effect of control over work scheduling and overtime on the relationship between workload demands and perceived job risk.

    Science.gov (United States)

    Näswall, Katharina; Burt, Christopher D B; Pearce, Megan

    2015-01-01

    This study investigated the impact of workload demands on perceived job risk using the Job Demand-Control model as a research framework. The primary objective was to test the hypothesis that employee control over work scheduling and overtime would moderate the relationship between workload demands and perceived job risk. Ninety-six participants working in a variety of industries completed measures of workload demands, and of control over work scheduling and overtime, and a measure of perceived job risk. Workload demands predicted higher perceptions of job risk. However, the results also suggest that control over overtime moderated this relationship, where those with the combination of high workload demands and low control over overtime reported higher levels of perceived risk. The results indicate that the JDC model is applicable to safety research. The results suggest that employee control over workload demands is an important variable to consider in terms of managing workplace safety. The present study also points to important areas for future research to explore in order to further understand the connection between demands and safety.

  16. [Working time and sleep in nursing staff employed in "3 x 8" and "2 x 12" fast rotating shift schedules].

    Science.gov (United States)

    Castellini, G; Anelli, M M; Punzi, S; Boari, P; Camerino, D; Costa, G

    2011-01-01

    The study is aimed at assessing, in 200 nurses shift workers, the impact on sleep of two different working areas ("emergency" and "hospitalization") having the same "3 x 8" shift system, and of two different shift schedules at quick rotation ("2 x 12" and "3 x 8") in the same working area ("emergency"). Night and morning shifts prove to interfere to a greater extent with sleep in relation to both "2 x 12" and "3 x 8" shift systems as well as to the two operative areas. Hence the importance to consider in shift work planning, the direction of shift rotation and the length of the duty period according to the type of activity.

  17. Alternate working fluids for solar air conditioning applications

    Science.gov (United States)

    Evans, R. D.; Beck, J. K.

    1978-01-01

    An experimental investigation of sixteen different refrigerant-absorbent fluid pairs has been carried out in order to determine their suitability as the working fluid in a solar-powered absorption cycle air conditioner. The criteria used in the initial selection of a refrigerant-absorbent pair included: high affinity (large negative deviation from Raoult's Law), high solubility, low specific heat, low viscosity, stability, corrosive properties, safety, and cost. For practical solar considerations of a fluid pair, refrigerants were selected with low boiling points whereas absorbent fluids were selected with a boiling point considerably above that of the refrigerant. Additional restrictions are determined by the operating temperatures of the absorber and the generator; these temperatures were specified as 100 F (39 C) and 170 F (77 C). Data are presented for a few selected pressures at the specified absorber and generator temperatures.

  18. Counting the minutes: administrative control of work schedules and time management of secondary school teachers in Québec.

    Science.gov (United States)

    Riel, Jessica; Messing, Karen

    2011-01-01

    Québec teachers have been identified as having a high level of stress and having difficulties with work-family balancing (WFB). An analysis of their work activity was done to identify task elements that could be changed. Work of 15 teachers was observed and 20 other teachers were interviewed. Ergonomic analysis, a mixed method that combines qualitative analysis with some quantitative data: 87 hours' observation; 15 interviews. Environmental parameters were recorded in 8 classrooms and in two faculty workrooms. Working postures were recorded. Teachers were subject to numerous demands in an often inadequate environment. A new management practice required teachers to spend 300 min/week outside class but in school, where their work could be monitored. The timed and scheduled tasks could not be done in the rooms provided due to overcrowding, inadequate physical environment, and lack of access to computers and telephones. Time at home decreased but work done at home did not. The physical environment of teaching impacts teaching activity. Work organization that treats a complex, results-oriented task as if it could be well represented by the number of supervised minutes spent on it can be problematic. WFB should be considered when work is re-organized.

  19. State of affairs regarding Flora Malesiana: progress in revision work and publication schedule

    NARCIS (Netherlands)

    Roos, M.C.

    1993-01-01

    The last two years I have made an inventory of the Flora Malesiana network and the revision work remaining. In total the network comprises c. 130 contributors working on 90 of the remaining 135 families (see Appendix). From an estimate by specialists on species numbers of vascular plants in Malesia

  20. A User Oriented Review of the Literature on the Effects of Sleep Loss, Work-Rest Schedules, and Recovery on Performance

    Science.gov (United States)

    1974-12-01

    Kales (Ed.), Sleep : Physiology and Pathology , Lippincott, Philadelphia, 1969, 221-231 43. Webb, W. B. and Agnew, H. W., Jr., " Sleep Stage Characteristics...AD-A009 778 A USER ORIENTED REVIEW OF THE LITERATURE ON THE EFFECTS OF SLEEP LOSS, WORK-REST SCHEDULES, AND RECOVERY ON PERFORMANCE Donald P...PERIOD COVERFO A USER ORIENTED REVIEW OF THE LITERATURE ON THE EFFECTS OF SLEEP LOSS, WORK-REST SCHEDULES AND Technical RECOVERY ON PERFORMANCE 6

  1. Decommissioning Programme Management: reducing risk and cost while accelerating schedules through improved planning, Earned Value Management and safe work execution

    International Nuclear Information System (INIS)

    Hansen, S.E.

    2008-01-01

    CH2M HILL experience includes more than two decades of managing nuclear facilities and providing clean-up and operations support for commercial and government facilities worldwide. Our expertise ranges from decommissioning and defence sector businesses to nuclear technology development and innovation. Our approach places top priority on the safe execution of work while reducing both risk and cost. Our nuclear services include: programme management, nuclear safety analysis, radiological protection, radioactive waste management, nuclear remediation, nuclear materials and waste transportation management, nuclear safeguards and security services, and nuclear decontamination and decommissioning. This paper will discuss our approach which has resulted in a strong track record of accelerating schedules and reducing costs of major nuclear programmes, including Rocky Flats, Idaho, and our work at UKAEA sites. (author)

  2. Migration distance and breeding latitude correlate with the scheduling of pre-alternate body moult : A comparison among migratory waders

    NARCIS (Netherlands)

    Lourenco, Pedro M.; Piersma, Theunis

    Moult is an important maintenance activity that should be carefully timed within the annual cycle. Many birds perform a pre-alternate moult of body feathers some time prior to the breeding season. In migrants, the timing of the pre-alternate moult coincides with the migration from wintering to

  3. PRACTICAL IMPLICATIONS OF LOCATION-BASED SCHEDULING

    DEFF Research Database (Denmark)

    Andersson, Niclas; Christensen, Knud

    2007-01-01

    The traditional method for planning, scheduling and controlling activities and resources in construction projects is the CPM-scheduling, which has been the predominant scheduling method since its introduction in the late 1950s. Over the years, CPM has proven to be a very powerful technique...... for planning, scheduling and controlling projects. However, criticism has been raised on the CPM method, specifically in the case of construction projects, for deficient management of construction work and discontinuous flow of resources. Alternative scheduling techniques, often called repetitive or linear...... that will be used in this study. LBS is a scheduling method that rests upon the theories of line-of-balance and which uses the graphic representation of a flowline chart. As such, LBS is adapted for planning and management of workflows and, thus, may provide a solution to the identified shortcomings of CPM. Even...

  4. Evaluating work/recovery schedules in terms of whole body heat storage

    Energy Technology Data Exchange (ETDEWEB)

    Hardcastle, S.G. [Natural Resources Canada, Sudbury, ON (Canada). CANMET Mining and Mineral Sciences Laboratories; Stapleton, J.M.; Kenny, G.P. [Ottawa Univ., Ottawa, ON (Canada). School of Human Kinetics, Human and Environmental Physiology Research Unit; Allen, C. [Vale Inco, Copper Cliff, ON (Canada)

    2010-07-01

    This paper reported on heat stress related research aimed at better managing the heat exposure of underground miners. The potential for underground miners to experience heat stress or strain is increasing due to greater mining depth; mechanization, and a trend towards larger diesel equipment; an aging workforce; an increasing amount of personal protective equipment worn to prevent injuries (that has led to most of the miner's body being covered) and increases in the surface climate that are superimposed through the underground workplace. This paper focused on research involving metabolic heat storage and the possibility of heat strain from elevated core temperatures. It targeted work/recovery cycles and the recovery strategies between work bouts. The first study examined the cumulative change in body heat content for a moderate metabolic rate and increasing the recovery allocation as per the TLV screening criteria to offset an increase in the wet bulb globe temperature (WBGT). The second study examined strategies that could be used between work bouts and how they affect the thermoregulatory system, heat generation or losses and net cumulative heat storage. The calorimeter based work suggested that a miner's clothing may be improved to promote evaporative cooling, and that work recovery regimes could be modified to maximize recovery. 10 refs., 1 tab., 6 figs.

  5. Effect of alternating postures on cognitive performance for healthy people performing sedentary work.

    Science.gov (United States)

    Schwartz, Bernhard; Kapellusch, Jay M; Schrempf, Andreas; Probst, Kathrin; Haller, Michael; Baca, Arnold

    2017-12-28

    Prolonged sitting is a risk factor for several diseases and the prevalence of worksite-based interventions such as sit-to-stand workstations is increasing. Although their impact on sedentary behaviour has been regularly investigated, the effect of working in alternating body postures on cognitive performance is unclear. To address this uncertainty, 45 students participated in a two-arm, randomised controlled cross-over trial under laboratory conditions. Subjects executed validated cognitive tests (working speed, reaction time, concentration performance) either in sitting or alternating working postures on two separate days (ClinicalTrials.gov Identifier: NCT02863731). MANOVA results showed no significant difference in cognitive performance between trials executed in alternating, standing or sitting postures. Perceived workload did not differ between sitting and alternating days. Repeated measures ANOVA revealed significant learning effects regarding concentration performance and working speed for both days. These results suggest that working posture did not affect cognitive performance in the short term. Practitioner Summary: Prior reports indicated health-related benefits based on alternated (sit/stand) body postures. Nevertheless, their effect on cognitive performance is unknown. This randomised controlled trial showed that working in alternating body postures did not influence reaction time, concentration performance, working speed or workload perception in the short term.

  6. Common Sleep, Psychiatric, and Somatic Problems According to Work Schedule: an Internet Survey in an Eastern European Country.

    Science.gov (United States)

    Voinescu, Bogdan I

    2018-03-19

    A wide range of health problems was investigated, aiming to identify the presence and severity of a set of self-reported and common sleep, psychiatric, and somatic health problems among working professionals in four different shift schedules (morning, evening, rotating, and day) in several cities in Romania. A heterogeneous sample of 488 workers of different professions completed online a battery of tests, namely the Basic Nordic Sleep Questionnaire, the Parasomnia Questionnaire, the Epworth Sleepiness Scale, and the Patient Health Questionnaire, designed to identity symptoms of insomnia, sleepiness, snoring, parasomnia, as well as of depression, anxiety, eating, somatoform, and alcohol use disorders, respectively. The timing and the duration of the sleep, along with the presence of high blood pressure and type 2 diabetes mellitus were also inquired. The prevalence of the different health problems in relation to the type of shift schedule was evaluated with the Pearson Chi-square test. ANOVA was used to calculate the significance of the difference between the means, while associations with different health problems were estimated by binary logistic regression. The most common mental health problems were depression (26%), insomnia (20%), alcohol misuse (18%), and anxiety (17%). No significant differences based on the type of shift in terms of health problems were found, except for high blood pressure and symptoms of panic disorder that were more frequently reported by the workers in early morning shifts. Together with the workers in rotating shifts, they also reported increased sleepiness, poorer sleep quality, and shorter sleep duration. In contrast, the workers in evening shifts reported less severe health problems and longer sleep duration. Working in early morning shifts was found to be associated with poorer health outcomes, while working in rotating and early morning shifts with more severe sleep-related problems.

  7. Consider the OIG Work Plan in your 2012 internal audit schedules.

    Science.gov (United States)

    Schaum, Kathleen D

    2011-12-01

    Wound care professionals should conduct monthly internal audits of their business processes. In addition to auditing, the coding, payment, and coverage issues that are considered issues by the Medicare contractor that processes your claims and the Medicare contractors that audit your claims and payments, be sure to include the OIG Work Plan topics that pertain to your wound care business. Remember, if atopic is important enough to make the OIG Work Plan, it should be important enough to make your 2012 internal audit plan. Because the Medicare Trust Fund is important to all US citizens, everyone has a responsibility to assist in combating fraud, waste, abuse, and mismanagement in HHS programs. Therefore, the OIG Hotline accepts tips from all sources. To provide a tip to the OIG Hotline, see Table 1 for contact information.

  8. Dissociating the effects of alternative early-life feeding schedules on the development of adult depression-like phenotypes.

    Science.gov (United States)

    Neville, Vikki; Andrews, Clare; Nettle, Daniel; Bateson, Melissa

    2017-11-01

    Early-life adversity is associated with increased vulnerability to depression in humans, and depression-like phenotypes in animals. However, different types of adverse experience may leave different signatures in adulthood. We experimentally manipulated the Amount of food delivered to European starling nestlings and the begging Effort required to obtain food during early development. Here, we report behavioural data in adulthood from a task that assessed sensitivity to shifts in reward magnitude characteristic of depression-like low mood. Birds that had experienced Hard Effort were more food motivated than birds that had experienced Easy Effort. Both Effort and Amount affected sensitivity to shifts in reward magnitude: Hard Effort birds showed an enhanced negative contrast effect following loss of reward ('disappointment'), and Lean Amount birds failed to show a normal positive contrast effect following gain in reward (a lack of 'elation'). Therefore, the feeding schedule experienced for just 10 days in early life caused enduring effects on feeding motivation and sensitivity to reward loss/gain consistent with human depression. Furthermore, the contrast effects were specific to different types of adversity. These results highlight the importance of early-life feeding schedules in the development of depression-like phenotypes.

  9. Prior Exercise Lowers Blood Pressure During Simulated Night-Work With Different Meal Schedules

    Science.gov (United States)

    Fullick, Sarah; Morris, Chris; Jones, Helen; Atkinson, Greg

    2009-01-01

    BACKGROUND Shift-work and a sedentary lifestyle are risk factors for raised blood pressure (BP). Exercise can reduce BP in diurnally-active individuals, but it is unknown whether postexercise hypotension persists when people are active and eating at night. We present the first investigation into the acute effects of exercise on BP monitored during simulated night-work. METHODS Nine normotensive participants, aged 20–42 years, completed at least two crossover trials beginning at 1800 hours. Between 1900 and 2000 hours, participants either rested or exercised at 50% peak oxygen uptake (VO2peak) and then remained awake throughout the night, completing various tasks until 0515 hours. Six participants completed a total of four trials in which they exercised or rested, whereas either one standardized (60 kJ/kg) meal at 2200 hours or two smaller (30 kJ/kg) meals at 2200 and 0200 hours were eaten. Systolic and diastolic BP, mean arterial pressure (MAP), heart rate (HR), and wrist activity were recorded every 30 min. RESULTS Following exercise, MAP was significantly (P < 0.0005) lower throughout the night-shift compared with no prior exercise (95% confidence limits for reduction: 4–7 mm Hg). The postexercise reductions in systolic BP and MAP were not moderated by diet, but the reduction in diastolic BP was slightly greater when only one meal was eaten (P < 0.0005). BP was lower even though wrist activity and HR were significantly higher following exercise (P < 0.0005). CONCLUSIONS These data indicate that prior exercise lowers BP throughout a subsequent 8-h night-shift in healthy individuals within the normotensive range. Therefore, regular low-intensity exercise might moderate the well-known association between shift-work participation and raised BP. PMID:19556971

  10. The validity of the risk index for comparing the accident risk associated with different work schedules.

    Science.gov (United States)

    Greubel, Jana; Nachreiner, Friedhelm

    2013-01-01

    Although it is known that there is an association between working hours and occupational accidents, there are only few tools which allow for an assessment of the risk associated with different working time arrangements, none of them validated yet by independent samples. Promising tools like the risk index (RI), assessed via the fatigue and risk index calculator, thus need to be validated. Since analyses on the validity of the RI based on individual data found only moderate associations between the RI and the actual accident risk, the question arises, whether a validation based on grouped data yields more promising results. Thus, the validity of the RI was re-examined, using aggregated data, i.e. pooling several individuals into groups of respondents according to their RI-score and performing calculations on the group level in order to control for individual and random variation. The study sample (n=337) was derived from an Internet survey on working hours and health, which contained information on working hours over four weeks and on the occurrence of an occupational accident during the last 12 months. Two models of aggregation were used: a distribution based and a criterion based classification, resulting in four RI groups each. Accident rates for each group were calculated and compared via χ(2)-analyses and fitting trends to the data. Results show, for both models of aggregation, that the accident rate increased exponentially with an increasing RI. Risk was 3.7 times (distribution based aggregation) and 6.5 times (criterion based aggregation) higher in the highest compared to the lowest RI-groups. The exponential trend explained 92% (distribution based aggregation) and 98% (criterion based aggregation) of the variance, respectively. Analyses for homogeneous subgroups (e.g., service sector, and workers with high workload) showed similar trends. Thus the analyses based on aggregated data indicated a considerable and consistently higher validity of the RI than the

  11. Variation at work: alternations between physically and mentally demanding tasks in blue-collar occupations.

    Science.gov (United States)

    Jahncke, Helena; Hygge, Staffan; Mathiassen, Svend Erik; Hallman, David; Mixter, Susanna; Lyskov, Eugene

    2017-09-01

    The aims of this questionnaire study were to describe the occurrence and desired number of alternations between mental and physical tasks in industrial and non-industrial blue-collar work, and determine to which extent selected personal and occupational factors influence these conditions. On average, the 122 participating workers (55 females) reported to have close to four alternations per day between mental and physical tasks, and to desire more alternations than they actually had. They also expressed a general preference for performing a physical task after a mental task and vice versa. In univariate regression models, the desired change in task alternations was significantly associated with gender, age, occupation, years with current work tasks and perceived job control, while occupation was the only significant determinant in a multiple regression model including all factors. Our results suggest that alternations between productive physical and mental tasks could be a viable option in future job rotation. Practitioner Summary: We addressed attitudes among blue-collar workers to alternations between physically and mentally demanding tasks. More alternations were desired than those occurring in the job, and workers preferred performing a physical task after a mental and vice versa. Alternating physical and mental tasks could, thus, be a viable option in job rotation.

  12. Sleep interruption associated with house staff work schedules alters circadian gene expression.

    Science.gov (United States)

    Fang, Ming Zhu; Ohman-Strickland, Pamela; Kelly-McNeil, Kathie; Kipen, Howard; Crabtree, Benjamin F; Lew, Jenny Pan; Zarbl, Helmut

    2015-11-01

    Epidemiological studies indicate that disruption of circadian rhythm by shift work increases the risk of breast and prostate cancer. Our studies demonstrated that carcinogens disrupt the circadian expression of circadian genes (CGs) and circadian-controlled genes (CCGs) during the early stages of rat mammary carcinogenesis. A chemopreventive regimen of methylselenocysteine (MSC) restored the circadian expression of CGs and CCGs, including PERIOD 2 (PER2) and estrogen receptor β (ERS2), to normal. The present study evaluated whether changes in CG and CCG expression in whole blood can serve as indicators of circadian disruption in shift workers. Fifteen shift workers were recruited to a crossover study. Blood samples were drawn before (6 PM) and after (8 AM) completing a night shift after at least seven days on floating night-shift rotation, and before (8 AM), during (1 PM), and after (6 PM) completing seven days on day shift. The plasma melatonin level and messenger RNA (mRNA) expression of PER2, nuclear receptor subfamily 1, group d, member 1 (NR1D1), and ERS2 were measured, and the changes in levels of melatonin and gene expression were evaluated with statistical analyses. The mRNA expression of PER2 was affected by shift (p = 0.0079); the levels were higher in the evening for the night shift, but higher in the morning for the day shift. Increased PER2 expression (p = 0.034) was observed in the evening on the night versus day shifts. The melatonin level was higher in the morning for both day shifts (p = 0.013) and night shifts (p <0.0001). Changes in the level of PER2 gene expression can serve as a biomarker of disrupted circadian rhythm in blood cells. Therefore, they can be a useful intermediate indicator of efficacy in future MSC-mediated chemoprevention studies. Copyright © 2015 Elsevier B.V. All rights reserved.

  13. 48 CFR 53.301-1093 - Standard Form 1093, Schedule of Withholdings Under the Davis-Bacon Act and/or the Contract Work...

    Science.gov (United States)

    2010-10-01

    ... 48 Federal Acquisition Regulations System 2 2010-10-01 2010-10-01 false Standard Form 1093, Schedule of Withholdings Under the Davis-Bacon Act and/or the Contract Work Hours and Safety Standards Act... Withholdings Under the Davis-Bacon Act and/or the Contract Work Hours and Safety Standards Act. EC01MY91.076 ...

  14. A Randomized, Controlled Trial of the Impact of Alternative Dosing Schedules on the Immune Response to Human Rotavirus Vaccine in Rural Ghanaian Infants.

    Science.gov (United States)

    Armah, George; Lewis, Kristen D C; Cortese, Margaret M; Parashar, Umesh D; Ansah, Akosua; Gazley, Lauren; Victor, John C; McNeal, Monica M; Binka, Fred; Steele, A Duncan

    2016-06-01

    The recommended schedule for receipt of 2-dose human rotavirus vaccine (HRV) coincides with receipt of the first and second doses of diphtheria, pertussis, and tetanus vaccine (ie, 6 and 10 weeks of age, respectively). Alternative schedules and additional doses of HRV have been proposed and may improve vaccine performance in low-income countries. In this randomized trial in rural Ghana, HRV was administered at ages 6 and 10 weeks (group 1), 10 and 14 weeks (group 2), or 6, 10, and 14 weeks (group 3). We compared serum antirotavirus immunoglobulin A (IgA) seroconversion (≥20 U/mL) and geometric mean concentrations (GMCs) between group 1 and groups 2 and 3. Ninety-three percent of participants (424 of 456) completed the study per protocol. In groups 1, 2, and 3, the IgA seroconversion frequencies among participants with IgA levels of correlate of protection, a postmarketing effectiveness study is required to determine whether the improvement in immune response translates into a public health benefit in low-income countries. NCT015751. © The Author 2016. Published by Oxford University Press for the Infectious Diseases Society of America.

  15. High Performance and the Transformation of Work? The Implications of Alternative Work Practices for the Experience and Outcomes of Work.

    Science.gov (United States)

    Godard, John

    2001-01-01

    A survey of 508 Canadian workers showed that moderate levels of high-performance work practices were associated with increased belonging, empowerment, job satisfaction, and organizational citizenship behavior. At higher levels, the association became negative. Work was more stressful with these practices. Team autonomy, just-in-time practices, and…

  16. NASA scheduling technologies

    Science.gov (United States)

    Adair, Jerry R.

    1994-01-01

    This paper is a consolidated report on ten major planning and scheduling systems that have been developed by the National Aeronautics and Space Administration (NASA). A description of each system, its components, and how it could be potentially used in private industry is provided in this paper. The planning and scheduling technology represented by the systems ranges from activity based scheduling employing artificial intelligence (AI) techniques to constraint based, iterative repair scheduling. The space related application domains in which the systems have been deployed vary from Space Shuttle monitoring during launch countdown to long term Hubble Space Telescope (HST) scheduling. This paper also describes any correlation that may exist between the work done on different planning and scheduling systems. Finally, this paper documents the lessons learned from the work and research performed in planning and scheduling technology and describes the areas where future work will be conducted.

  17. An educational alternative for improving working conditions in small and medium enterprises

    OpenAIRE

    Eliana Castro S; Elisabeth Herreño T

    2011-01-01

    Managing health and safety at work involves considering two internal processes common to all organizations: knowledge and human talent management. These two processes are affected by globalizing phenomena that have an effect at the economic, environmental, and occupational levels. This is especially true for countries like Colombia. Objective: to provide an educational alternative that contributes to knowledge management in SME’s in order to improve the working conditions and to support their...

  18. Association of Sleep Duration, Sleep Quality and Shift-Work Schedule in Relation to Hypertension Prevalence in Chinese Adult Males: A Cross-Sectional Survey.

    Science.gov (United States)

    Lu, Kai; Chen, Jia; Wang, Li; Wang, Changying; Ding, Rongjing; Wu, Shouling; Hu, Dayi

    2017-02-21

    Background: Previous studies indicated that measurement of sleep only by duration and quality may be biased. This study aimed to investigate the interactive association of self-reported sleep duration, quality and shift-work schedule with hypertension prevalence in Chinese adult males. Methods: A total of 4519 Chinese adult males (≥18 years) were enrolled into the cross-sectional survey. Sleep attributes were measured from the responses to the standard Pittsburgh Sleep Quality Index and relevant questions in a structured questionnaire survey. The association of sleep duration, quality and shift-work schedule with hypertension prevalence was analyzed using multivariate logistic regression, considering the interaction between them or not. Results: Taking the potential interaction of the three aspects of sleep into consideration, only short sleep duration combined with poor sleep quality was found to be related to hypertension prevalence in Chinese adult males (odds ratio (OR): 1.74, 95% confidence interval (CI): 1.31-2.31), which could be modified by occasional and frequent shift-work schedule (OR: 1.43, 95% CI: 1.05-1.95; OR: 1.97, 95% CI: 1.40-2.79). Conclusions: Short sleep duration was not associated with the prevalence of hypertension in Chinese adult males unless poor sleep quality exists, which could be further modified by shift-work schedule. Assessment of sleep by measuring sleep duration only was not sufficient when exploring the association of sleep with hypertension.

  19. Evaluation of a twelve-hour/day shift schedule

    International Nuclear Information System (INIS)

    Lewis, P.M.; Swaim, D.J.

    1986-01-01

    In April 1985, the operating crews at the Fast Flux Test Facility near Richland, Washington, changed their rotating shift schedule from an 8-hour to a 12-hour a day work schedule. The primary purpose of the change was to reduce the attrition of operators by increasing their job satisfaction. Eighty-four percent of the operators favored the change. A program was established to evaluate the effects on plant performance, operator alertness, attrition, sleep, health, job satisfaction, and off-the-job satisfaction. Preliminary results from that evaluation program indicate that the 12-hour shift schedule is a reasonable alternative to an 8-hour schedule at this facility

  20. "Always work with a straight back": the fallacies of modern management and the alternative

    DEFF Research Database (Denmark)

    Petersen, Verner C.

    2005-01-01

    in mind-less and care-less behaviour by employees, while an alternative relying on self-organisation and value-based leadership might preserve and enhance insight, motivation and responsibility. Research limitations/implications - The paper is mainly a conceptual discussion using examples. Practical......Purpose - The purpose of this article is to show that the tools of modern management which are supposed to promote effectiveness, efficiency and responsible behaviour, may in fact contribute to the opposite, and to present the outline of an alternative based upon new ideas of self......-organisation and value-based leadership. Design/methodology/approach - Practical examples are used to discuss and demonstrate the problematic consequences of using management tools like detailed work descriptions, standards, comprehensive measurement schemes, and rule-based specifications of responsibility. Constructed...

  1. Scheduling for decommissioning projects

    International Nuclear Information System (INIS)

    Podmajersky, O.E.

    1987-01-01

    This paper describes the Project Scheduling system being employed by the Decommissioning Operations Contractor at the Shippingport Station Decommissioning Project (SSDP). Results from the planning system show that the project continues to achieve its cost and schedule goals. An integrated cost and schedule control system (C/SCS) which uses the concept of earned value for measurement of performance was instituted in accordance with DOE orders. The schedule and cost variances generated by the C/SCS system are used to confirm management's assessment of project status. This paper describes the types of schedules and tools used on the SSDP project to plan and monitor the work, and identifies factors that are unique to a decommissioning project that make scheduling critical to the achievement of the project's goals. 1 fig

  2. Use of Complementary and Alternative Medicine for Work Related Musculoskeletal Disorders Associated With Job Contentment in Dental Professionals: Indian Outlook

    OpenAIRE

    Gupta, Devanand; Bhaskar, Dara John; Gupta, Kumar Rajendra; Karim, Bushra; Kanwar, Alpana; Jain, Ankita; Yadav, Ankit; Saini, Priya; Arya, Satya; Sachdeva, Neha

    2014-01-01

    Background High prevalence rates of work-related musculoskeletal disorders (WRMSD) among dentists have been reported. Complementary and alternative medicine (CAM) therapies can be helpful in managing and preventing work-related musculoskeletal disorders. The purpose of this study was to determine if dental professionals are using CAM for work-related musculoskeletal disorders. Who have greater job satisfaction: dentist who uses Complementary and alternative medicine (CAM) or conventional ther...

  3. Job Burnout and its Association With Work Schedules and Job Satisfaction Among Iranian Nurses in a Public Hospital: A Questionnaire Survey

    Directory of Open Access Journals (Sweden)

    Asghari

    2016-08-01

    Full Text Available Background Job burnout, defined as a syndrome derived from prolonged exposure to stressors at work, is often observed in health care workers. Shift work and job satisfaction are considered two of the occupational risks for burnout in nurses. Nurses have stress and health complaints. In addition, nurses are likely to job burnout. Objectives The current study aimed to determine the prevalence of job burnout and its association with work schedules and job satisfaction among Iranian nurses in a public hospital. Methods This cross-sectional study was conducted in one of the largest Iranian public hospitals among 362 nurses (response rate: 80.44% in Tehran, Iran. The Maslach burnout inventory (MBI-22 and demographic factors questionnaire were used in the present study. The relationship between job burnout with work schedules and job satisfaction was investigated with multiple logistic regression analysis. Results The mean age and work experience of the participants were 36.14 ± 8.59 and 15.23 ±9.30 years, respectively. The result indicated a relatively high prevalence of burnout (particularly, personal accomplishment among the study population. In general, 64.4% of participants reported low personal accomplishment level. The nurses engaged in shift work reported higher levels of emotional exhaustion (odds ratio (OR = 1.02, 95% confidence interval (CI = 1.006 - 1.041, P-value = 0.008; there was no relationship between work schedules with depersonalization and personal accomplishment. The result showed significant relationship between job satisfaction and emotional exhaustion (OR = 0.945, 95% CI = 0.928 - 0.963, P-value < 0.001 and personal accomplishment (OR = 1.003, 95% CI = 1.014 - 1.058, P-value = 0.001. Conclusions The current study revealed that the Iranian nurses are exposed to a considerable risk of personal accomplishment. Also, job burnout is in association with shift working and low job satisfaction level. In this regard, working pressure

  4. An educational alternative for improving working conditions in small and medium enterprises

    Directory of Open Access Journals (Sweden)

    Eliana Castro S

    2011-11-01

    Full Text Available Managing health and safety at work involves considering two internal processes common to all organizations: knowledge and human talent management. These two processes are affected by globalizing phenomena that have an effect at the economic, environmental, and occupational levels. This is especially true for countries like Colombia. Objective: to provide an educational alternative that contributes to knowledge management in SME’s in order to improve the working conditions and to support their innovation processes. Methodology: an exploratory and descriptive study. We start by analyzing the concepts related to the improvement of working conditions and experiences from previous projects involving the university-industry relationship. This is done from the systemic viewpoint that characterizes the ergonomics and interdisciplinary perspectives of the professional practice of industrial design. Result: the proposal was approved by regional institutions wishing to conduct a pilot study, and is based on principles establishing health promotion at the workplace. It also includes a methodology for affecting the technological core of companies and contributes to the empowerment of the personnel involved. Conclusion:it is mandatory that organizations express their support and commitment through a policy that facilitates the active participation of employees in these processes.

  5. Use of complementary and alternative medicine for work related musculoskeletal disorders associated with job contentment in dental professionals: Indian outlook.

    Science.gov (United States)

    Gupta, Devanand; Bhaskar, Dara John; Gupta, Kumar Rajendra; Karim, Bushra; Kanwar, Alpana; Jain, Ankita; Yadav, Ankit; Saini, Priya; Arya, Satya; Sachdeva, Neha

    2014-04-01

    High prevalence rates of work-related musculoskeletal disorders (WRMSD) among dentists have been reported. Complementary and alternative medicine (CAM) therapies can be helpful in managing and preventing work-related musculoskeletal disorders. The purpose of this study was to determine if dental professionals are using CAM for work-related musculoskeletal disorders. Who have greater job satisfaction: dentist who uses Complementary and alternative medicine (CAM) or conventional therapy (CT) as a treatment modality for WRMSD. Dentists who registered in Uttar Pradesh state, India under Indian Dental Council, Uttar Pradesh branch (n=1134) were surveyed. Data were analyzed using univariate and bivariate analyses and logistic regression. A response rate of 53% (n=601) was obtained, revealing that 82% (n=487) of the respondents suffered from work-related musculoskeletal disorders. The use of complementary and alternative medicine or conventional therapy was reported among 80% (n=390) of the dentists with work-related musculoskeletal disorders. Complementary and alternative medicine users reported greater overall health compared to conventional therapy users (PComplementary and alternative medicine therapies may improve quality of life, reduce work disruptions and enhance job satisfaction for dentists who suffer from work-related musculoskeletal disorders. It is important that dentists incorporate complementary and alternative medicine strategies into practice to facilitate musculoskeletal health that will enable longer and healthier careers, increase productivity, provide safer workplace and prevent musculoskeletal disorders.

  6. Categorization Working Memory Span Task: Validation study of two Brazilian alternate versions.

    Science.gov (United States)

    Brum, Paula Schimidt; Borella, Erika; Carretti, Barbara; Guidotti, Elena; Yassuda, Mônica Sanches

    2018-04-01

    The Categorization Working Memory Span Task (CWMS task) is a complex working memory (WM) span test that has been used previously to assess age and individual differences in WM as well as the relationship between WM and complex aspects of cognition such as listening comprehension. Two alternate versions of the task have been developed to be used as outcome variables in WM training protocol, which mirrors the task involved in the CWMS task. (1) To translate and adapt the CWMS task for Brazilian Portuguese; (2) to test the equivalence of its 2 alternate versions; (3) to examine temporal stability; (4) to examine the influence of age and schooling on CWMS task; (5) to establish its relationship with other tests of WM. Eighty-one older adults completed version A, and 86 completed version B of the CWMS task. After 6 months, a subsample (n = 85) completed the same version of the task. Versions A and B of the task generated comparable scores. Both versions had adequate temporal stability, which was higher for the CWMS total recall, which is the classical variable in this task to represent WM performance, when compared to the other variables generated by the test. The CWMS task variables were moderately correlated with schooling and other cognitive tests (Mini Mental State Examination, Letter-Number Sequencing, Spatial Span Backward, Digit Span Forward). The 2 versions of the CWMS task were equivalent and stable temporally. The task was influenced by schooling and global cognition. Copyright © 2017 John Wiley & Sons, Ltd.

  7. "Doing our best to keep a routine:" How low-income mothers manage child feeding with unpredictable work and family schedules.

    Science.gov (United States)

    Agrawal, Tara; Farrell, Tracy Jean; Wethington, Elaine; Devine, Carol M

    2018-01-01

    Significant changes in work and family conditions over the last three decades have important implications for understanding how young children are fed. The new conditions of work and family have placed pressures on families. The aim of this study was to explore the work and family pressures shaping the ways parents feed their young children on a day-to-day basis. Twenty-two purposively recruited low-income employed mothers of 3-4 year old children from a rural county Head Start program in Upstate New York reported details about the context of their children's eating episodes in a 24-h qualitative dietary recall. Participating mothers were employed and/or in school at least 20 h a week and varied in partner and household characteristics. Interview transcripts were open coded using the constant comparative method for usual ways of feeding children. A typology of three emergent child feeding routines was identified based on mothers' accounts of the recurring ways they fed their child. Mothers' feeding routines were distinguished by a combination of four recurring key strategies - planning ahead, delegating, making trade-offs, and coordinating. Work schedule predictability and other adults helped mothers maintain feeding routines. Unexpected daily events, such as working overtime or waking up late, disrupted child feeding routines and required modifications. These findings suggest that understanding how young children are fed requires recognizing the socio-ecological environments that involve working mothers' daily schedules and household conditions and the multiple ways that mothers manage food and feeding to fit environmental constraints. There is a need to look at more than just family meals to understand parents' daily strategies for feeding young children and their implications for child nutrition. Copyright © 2017 Elsevier Ltd. All rights reserved.

  8. Spontaneous alternation: A potential gateway to spatial working memory in Drosophila.

    Science.gov (United States)

    Lewis, Sara A; Negelspach, David C; Kaladchibachi, Sevag; Cowen, Stephen L; Fernandez, Fabian

    2017-07-01

    Despite their ubiquity in biomedical research, Drosophila have yet to be widely employed as model organisms in psychology. Many complex human-like behaviors are observed in Drosophila, which exhibit elaborate displays of inter-male aggression and female courtship, self-medication with alcohol in response to stress, and even cultural transmission of social information. Here, we asked whether Drosophila can demonstrate behavioral indices of spatial working memory in a Y-maze, a classic test of memory function and novelty-seeking in rodents. Our data show that Drosophila, like rodents, alternate their visits among the three arms of a Y-maze and spontaneously favor entry into arms they have explored less recently versus ones they have just seen. These findings suggest that Drosophila possess some of the information-seeking and working memory facilities mammals depend on to navigate through space and might be relevant models for understanding human psychological phenomena such as curiosity. Copyright © 2017 Elsevier Inc. All rights reserved.

  9. Comparison of false positive rates for screening breast magnetic resonance imaging (MRI) in high risk women performed on stacked versus alternating schedules

    OpenAIRE

    Othman, Edress; Wang, Jue; Sprague, Brian L; Rounds, Tiffany; Ji, YongLi; Herschorn, Sally D; Wood, Marie E

    2015-01-01

    Purpose Breast MRI added to mammography increases screening sensitivity for high-risk women but false-positive (FP) rates are higher and the optimal screening schedule for coordination with mammography is unclear. We compare rates of FP MRI when studies were performed on two different schedules. Patients and methods High-risk women at the University of Vermont who had at least 1 MRI and 1 mammogram performed within one year between 2004?2012 were eligible for inclusion in this study. Screenin...

  10. Shift schedule, work-family relationships, marital communication, job satisfaction and health among transport service shift workers.

    Science.gov (United States)

    Iskra-Golec, Irena; Smith, Lawrence; Wilczek-Rużyczka, Ewa; Siemiginowska, Patrycja; Wątroba, Joanna

    2017-02-21

    Existing research has documented that shiftwork consequences may depend on the shift system parameters. Fast rotating systems (1-3 shifts of the same kind in a row) and day work have been found to be less disruptive biologically and socially than slower rotating systems and afternoon and night work. The aim of this study was to compare day workers and shift workers of different systems in terms of rotation speed and shifts worked with regard to work-family and family-work positive and negative spillover, marital communication style, job satisfaction and health. Employees (N = 168) of the maintenance workshops of transportation service working different shift systems (day shift, weekly rotating 2 and 3‑shift system, and fast rotating 3-shift system) participated in the study. They completed the Work- Family Spillover Questionnaire, Marital Communication Questionnaire, Minnesota Job Satisfaction Questionnaire and the Physical Health Questionnaire (a part of the Standard Shiftwork Index). The workers of quicker rotating 3-shift systems reported significantly higher scores of family-to-work facilitation (F(3, 165) = 4.175, p = 0.007) and a higher level of constructive style of marital communication (Engagement F(3, 165) = 2.761, p = 0.044) than the workers of slower rotating 2-shift systems. There were no differences between the groups of workers with regard to health and job satisfaction. A higher level of work-family facilitation and a more constructive style of marital communication were found among the workers of faster rotating 3-shift system when compared to the workers of a slower rotating 2-shift system (afternoon, night). This may indicate that the fast rotating shift system in contrary to the slower rotating one is more friendly for the work and family domains and for the relationship between them. Int J Occup Med Environ Health 2017;30(1):121-131. This work is available in Open Access model and licensed under a CC BY-NC 3.0 PL license.

  11. Decentralized Ground Staff Scheduling

    DEFF Research Database (Denmark)

    Sørensen, M. D.; Clausen, Jens

    2002-01-01

    Typically, ground staff scheduling is centrally planned for each terminal in an airport. The advantage of this is that the staff is efficiently utilized, but a disadvantage is that staff spends considerable time walking between stands. In this paper a decentralized approach for ground staff...... scheduling is investigated. The airport terminal is divided into zones, where each zone consists of a set of stands geographically next to each other. Staff is assigned to work in only one zone and the staff scheduling is planned decentralized for each zone. The advantage of this approach is that the staff...... work in a smaller area of the terminal and thus spends less time walking between stands. When planning decentralized the allocation of stands to flights influences the staff scheduling since the workload in a zone depends on which flights are allocated to stands in the zone. Hence solving the problem...

  12. Power Extension Package (PEP) system definition extension, orbital service module systems analysis study. Volume 11: PEP, cost, schedules, and work breakdown structure dictionary

    Science.gov (United States)

    1979-01-01

    Cost scheduling and funding data are presented for the reference design of the power extension package. Major schedule milestones are correlated with current Spacelab flight dates. Funding distributions provide for minimum expenditure during the first year of the project.

  13. Specific schedule conditions for the formation of personnel of A or B category working in nuclear facilities. Option research center

    International Nuclear Information System (INIS)

    2002-01-01

    This document describes the specific dispositions relative to the Research Center, for the formation to the conventional and radiation risks prevention of personnel of A or B category working in nuclear facilities. The application domain, the applicable documents, the liability, the specificity of the Research Center and of the retraining, the Passerelle formation, are presented. (A.L.B.)

  14. Specific schedule conditions for the formation of personnel of A or B category working in nuclear facilities. Option nuclear reactor

    International Nuclear Information System (INIS)

    2002-01-01

    This document describes the specific dispositions relative to the nuclear reactor domain, for the formation to the conventional and radiation risks prevention of personnel of A or B category working in nuclear facilities. The application domain, the applicable documents, the liability, the specificity of the nuclear reactor and of the retraining, the Passerelle formation, are presented. (A.L.B.)

  15. New skills for secondary school teacher: the alternation between school and work

    Directory of Open Access Journals (Sweden)

    Emanuela Maria Torre

    2016-07-01

    Full Text Available The Italian Law no. 107/2015 introduced for all secondary students the obligation to carry out part of their training program in alternation between school and work. New scenarios are therefore open to the Italian schools, the potential effects of which need systematic reflections, requiring the review of the organizational structure of teaching and the relationship with the territory and which involve an expansion of teacher competence profile. This paper explores, in light of international studies, the main models of integration between school and work and its effectiveness factors. The analysis highlights the central role of teachers in this area. We present the results of a survey conducted on a sample of 88 high schools in Piedmont (Italy, aimed at detecting the perception of teachers in relation to their role and their function in the ASL, in the light of the first experiences carried out. The results highlight the potential growth areas of the teaching profession, for the construction of effective paths.Nuove competenze per l’insegnante di scuola secondaria di secondo grado: l’alternanza scuola-lavoroLa L. n. 107/2015 ha introdotto per tutti gli studenti del triennio della scuola secondaria di secondo grado l’obbligo di effettuare parte del proprio percorso formativo in Alternanza Scuola-Lavoro (ASL. Si aprono dunque per le scuole italiane nuovi scenari, sui cui effetti potenziali occorre avviare riflessioni sistematiche, che richiedono di rivedere l’assetto organizzativo della didattica e i rapporti con il territorio e che comportano un ampliamento del profilo di competenza degli insegnanti. Il presente contributo approfondisce, alla luce degli studi internazionali, i principali modelli di integrazione tra scuola e lavoro nell’istruzione secondaria e i relativi fattori di efficacia. L’analisi evidenzia il ruolo centrale dei docenti in tale ambito. Si presentano quindi gli esiti di un’indagine, condotta su un campione di 88

  16. Comparison of Two Watch Schedules for Personnel at the White House Military Office President's Emergency Operations Center.

    Science.gov (United States)

    Shattuck, Nita Lewis; Matsangas, Panagiotis; Eriksen, Elke; Kulubis, Spiros

    2015-08-01

    The aim of this study was to assess effectiveness of an alternative, 24-hr-on/72-hr-off watchstanding schedule on sleep and morale of personnel assigned to the President's Emergency Operations Center (PEOC). As part of the White House Military Office, PEOC personnel historically worked a 12-hr "Panama" watch schedule. Personnel reported experiencing chronic insufficient and disrupted sleep patterns and sought advice for improving their watchstanding schedule. Participants (N = 14 active-duty military members, ages 29 to 42 years) completed the Profile of Mood State (POMS) three times: before, during, and after switching to the alternative schedule with 5-hr sleep periods built into their workday. Participants completed a poststudy questionnaire to assess individual schedule preferences. Sleep was measured actigraphically, supplemented by activity logs. As indicated by POMS scores, mood improved significantly on the new schedule. Although average total sleep amount did not change substantively, the timing of sleep was more consistent on the new schedule, resulting in better sleep hygiene. PEOC personnel overwhelmingly preferred the new schedule, reporting not only that they felt more rested but that the new schedule was more conducive to the demands of family life. Demands of family life and time spent commuting were found to be critical factors for acceptance of the alternative schedule. This new schedule will be most effective if personnel adhere to the scheduled rest periods assigned during their 24-hr duty. A successful schedule should avoid conflicts between social life and operational demands. Results may lead to changes in the work schedules of other departments with similar 24/7 responsibilities. © 2015, Human Factors and Ergonomics Society.

  17. Turbo-alternator-compressor design for supercritical high density working fluids

    Science.gov (United States)

    Wright, Steven A.; Fuller, Robert L.

    2013-03-19

    Techniques for generating power are provided. Such techniques involve a thermodynamic system including a housing, a turbine positioned in a turbine cavity of the housing, a compressor positioned in a compressor cavity of the housing, and an alternator positioned in a rotor cavity between the turbine and compressor cavities. The compressor has a high-pressure face facing an inlet of the compressor cavity and a low-pressure face on an opposite side thereof. The alternator has a rotor shaft operatively connected to the turbine and compressor, and is supported in the housing by bearings. Ridges extending from the low-pressure face of the compressor may be provided for balancing thrust across the compressor. Seals may be positioned about the alternator for selectively leaking fluid into the rotor cavity to reduce the temperature therein.

  18. The Air Traffic Controller Work-Shift Scheduling Problem in Spain from a Multiobjective Perspective: A Metaheuristic and Regular Expression-Based Approach

    Directory of Open Access Journals (Sweden)

    Faustino Tello

    2018-01-01

    Full Text Available We address an air traffic control operator (ATCo work-shift scheduling problem. We consider a multiple objective perspective where the number of ATCos is fixed in advance and a set of ATCo labor conditions have to be satisfied. The objectives deal with the ATCo work and rest periods and positions, the structure of the solution, the number of control center changes, or the distribution of the ATCo workloads. We propose a three-phase problem-solving methodology. In the first phase, a heuristic is used to derive infeasible initial solutions on the basis of templates. Then, a multiple independent run of the simulated annealing metaheuristic is conducted aimed at reaching feasible solutions in the second phase. Finally, a multiple independent simulated annealing run is again conducted from the initial feasible solutions to optimize the objective functions. To do this, we transform the multiple to single optimization problem by using the rank-order centroid function. In the search processes in phases 2 and 3, we use regular expressions to check the ATCo labor conditions in the visited solutions. This provides high testing speed. The proposed approach is illustrated using a real example, and the optimal solution which is reached outperforms an existing template-based reference solution.

  19. Gemcitabine and cisplatin in a concomitant alternating chemoradiotherapy program for locally advanced head-and-neck cancer: A pharmacology-guided schedule

    International Nuclear Information System (INIS)

    Numico, Gianmauro; Russi, Elvio G.; Vitiello, Raffele; Sorrentino, Raffaele; Colantonio, Ida; Cipolat, Marco; Taglianti, Riccardo Vigna; Pelissero, Antonio; Fea, Elena; Granetto, Cristina; Di Costanzo, Gianna; Gasco, Milena; Garrone, Ornella; Occelli, Marcella; Merlano, Marco

    2006-01-01

    Purpose: Administration of gemcitabine together with cisplatin at cytotoxic doses in a chemoradiotherapy regimen is hampered by a high degree of local toxicity. Using the pharmacologic properties of the drug we designed a modified schedule aimed at reducing toxicity while preserving activity. Methods and Materials: Patients with squamous cell carcinomas of the oral cavity, pharynx and larynx, bulky T4, and/or N2 to N3 were eligible. Gemcitabine was administered at a dose of 800 mg/m 2 on Days 1 and 12 and cisplatin at a dose of 20 mg/m 2 on Days 2 to 5, every 21 days for 3 courses. Radiotherapy, delivered with standard fractionation, was given on Days 8 to 12 and 15 to 19 and was repeated 3 times up to a total dose of ≥60 Gy. Results: A total of 28 patients were selected. Grade 3 to 4 stomatitis was recorded in 25 patients (89%). Thirteen patients (46%) experienced Grade 3 to 4 neutropenia. Febrile neutropenia occurred in 8 patients (29%) and in 2 was complicated by infection and death. The overall complete response rate was 79%. At a median follow up of 71 months, 11 patients had a locoregional relapse (3-year locoregional control, 64%); 6 patients had distant metastases, among whom only 2 were without locoregional recurrence. The 3-year progression-free survival is 39% and 3-year overall survival has been 43%. Conclusion: The schedule modification did not attenuate local toxicity. Moreover, infections and especially pneumonia, were a major problem. The high activity of gemcitabine when combined with radiotherapy would most likely be better exploited in the context of modified radiation schemes

  20. Complementing the Mainstream: An Exploration of Partnership Work between Complementary Alternative Provisions and Mainstream Schools

    Science.gov (United States)

    Pennacchia, Jodie; Thomson, Pat

    2016-01-01

    In the English context, complementary alternative provisions (APs) can make specific positive contributions for young people at risk of exclusion from mainstream school. Whilst recognising the potential value of all complementary AP that is carefully selected and of high quality, we problematise the "repair and return" rationale that…

  1. Symbolic Non-Violence in the Work of Teachers in Alternative Education Settings

    Science.gov (United States)

    Waters, Richard

    2017-01-01

    Patterns in analysis of research data on alternative education practices as well as on student and teacher experience in mainstream settings seem to support Pierre Bourdieu and Jean Claude Passeron's theory of symbolic violence. Data from teachers and students suggest that students from low socio-economic backgrounds often disengage from education…

  2. New Ways of Working and Organization: Alternative Agrifood Movements and Agrifood Researchers

    Science.gov (United States)

    Friedland, William H.

    2010-01-01

    The remarkable growth of alternative agrifood movements--organics, fair trade, localism, Slow Food, farmers' markets, community-supported agriculture, food security, food safety, food sovereignty, anti-genetically modified organisms, animal welfare, and others--and their attraction to younger academic scholars offer a unique opportunity to explore…

  3. Development of an alternative low-cost solar collector working at medium temperature (150 - 250°C)

    Science.gov (United States)

    Vidal, Frédéric; Chandez, Bertrand; Albert, Raphael

    2017-06-01

    Within the subtask 11.1.1 of the European project STAGE-STE, the CEA is in charge of the development of an alternative low-cost collector working at medium temperature (150-250 °C). PTC are installed in a small glasshouse in order to decrease the steel mass of the solar field. After a brief background of alternative PTC construction, characteristics and advantages of such a collector are presented and PTC arrangement performance (axis orientation, tilt angle) are discussed. Then, some mechanical studies are detailed and three prototypes module design are presented as well as their optical qualification.

  4. Schedule Analytics

    Science.gov (United States)

    2016-04-30

    led several cost research initiatives in cloud computing, service-oriented architecture, and agile development and various independent schedule...and he supports DoD and federal acquisition efforts with a focus on rapid and agile practices to speed solutions with the lowest practical program...assessment, and risk management to control cost and deliver on time. A Government Accountability Office (GAO) assessment of 86 programs that made up the

  5. Construction schedules slack time minimizing

    Science.gov (United States)

    Krzemiński, Michał

    2017-07-01

    The article presents two copyright models for minimizing downtime working brigades. Models have been developed for construction schedules performed using the method of work uniform. Application of flow shop models is possible and useful for the implementation of large objects, which can be divided into plots. The article also presents a condition describing gives which model should be used, as well as a brief example of optimization schedule. The optimization results confirm the legitimacy of the work on the newly-developed models.

  6. Alternative tools to mass production and human performance indicators in sheltered work centers of Valencian community (Spain

    Directory of Open Access Journals (Sweden)

    Juan A. Marin-Garcia

    2011-10-01

    Full Text Available Purpose: The most popular alternative systems to mass production at an academic level (lean manufacturing, agile manufacturing, flexible customization, mass customization... share many characteristics. Our article identifies an extensive set of alternative practices to mass production; analyzes the classification of practices in categories (Flow, TQM, TPM, Customer Relations, Supplier Relations and Human Resources Practices and analyzes the impact on several human performance indicators such as satisfaction, absenteeism, voluntary turnover, permanent contracts, knowledge, personal & social adjustment activities and integration of workers into ordinary companies. Design/methodology/approach: Survey in sheltered work centers. We use regression analysis in order to prove relations between explicative and criterion variables. Findings: The results of our research allow us to identify that human resource management and customer relationship practices have significant effects on job satisfaction, knowledge, integration into ordinary companies and personal and social adjustment. Research limitations/implications: Data came only from one industry; therefore the results would not be directly generalized to other contexts. Practical implications: Managers in Sheltered work centers can estimate the impact of the deployment of alternative tools to mass production. Originality/value: There are few papers relating lean manufacturing tools and human resources performance indicators. At the same time, there are very few research carried out in sheltered work centers context.

  7. Alternative Visions for Pastoral Work with LGBTQ Individuals, Families, and Communities: A Response.

    Science.gov (United States)

    Marshall, Joretta L

    2017-03-01

    Multiple theological perspectives provide frameworks for pastoral work with lesbian, gay, bisesxual and trans individuals, families, and communities. One model is offered by those who argue for celibacy or heterosexual marriages for those who self-identify as part of LGBTQ communities. This article names other theologically grounded perspectives with the goal of inviting practitioners to broaden their understandings and wrestle with the implications of their theological and ethical stances. When reflecting on the intersection of spirituality and sexuality, the meaning of theological terms such as sin, contributions from queer theologians and pastoral counselors, and the limitations of binary categories common in our theological history, this article encourages pastoral counselors and spiritual care providers to re-examine theological assumptions they bring to their work. The article ends with questions and opportunities for ongoing pastoral theological work and reflection.

  8. Part Time Alternative Program, Graduate Social Work Education in Texas: Nibblers at the Feast of Learning.

    Science.gov (United States)

    Pittman-Munke, Peggy

    A study was made of the way part-time students are served by the four graduate schools of social work in Texas: University of Texas in Austin (UT), University of Texas at Arlington (UTA), University of Houston, and the Worden School of Social Service of Our Lady of the Lake University (OLLU). Each school offers at least one type of part-time…

  9. Cure Schedule for Stycast 2651/Catalyst 9.

    Energy Technology Data Exchange (ETDEWEB)

    Kropka, Jamie Michael [Sandia National Lab. (SNL-NM), Albuquerque, NM (United States); McCoy, John D. [New Mexico Inst. of Mining and Technology, Socorro, NM (United States)

    2017-11-01

    The Emerson & Cuming technical data sheet (TDS) for Stycast 2651/Catalyst 9 lists three alternate cure schedules for the material, each of which would result in a different state of reaction and different material properties. Here, a cure schedule that attains full reaction of the material is defined. The use of this cure schedule will eliminate variance in material properties due to changes in the cure state of the material, and the cure schedule will serve as the method to make material prior to characterizing properties. The following recommendation uses one of the schedules within the TDS and adds a “post cure” to obtain full reaction.

  10. Comparison of two repositioning schedules for the prevention of pressure ulcers in patients on mechanical ventilation with alternating pressure air mattresses.

    Science.gov (United States)

    Manzano, Francisco; Colmenero, Manuel; Pérez-Pérez, Ana María; Roldán, Delphine; Jiménez-Quintana, María del Mar; Mañas, María Reyes; Sánchez-Moya, María Angustias; Guerrero, Carmen; Moral-Marfil, María Ángeles; Sánchez-Cantalejo, Emilio; Fernández-Mondéjar, Enrique

    2014-11-01

    The objective was to compare the effectiveness of repositioning every 2 or 4 h for preventing pressure ulcer development in patients in intensive care unit under mechanical ventilation (MV). This was a pragmatic, open-label randomized clinical trial in consecutive patients on an alternating pressure air mattress (APAM) requiring invasive MV for at least 24 h in a university hospital in Spain. Eligible participants were randomly assigned to groups for repositioning every 2 (n = 165) or 4 (n = 164) h. The primary outcome was the incidence of a pressure ulcer of at least grade II during ICU stay. A pressure ulcer of at least grade II developed in 10.3% (17/165) of patients turned every 2 h versus 13.4% (22/164) of those turned every 4 h (hazard ratio [HR] 0.89, 95% confidence interval [CI] 0.46-1.71, P = 0.73). The composite end point of device-related adverse events was recorded in 47.9 versus 36.6% (HR 1.50, CI 95% 1.06-2.11, P = 0.02), unplanned extubation in 11.5 versus 6.7% (HR 1.77, 95% CI 0.84-3.75, P = 0. 13), and endotracheal tube obstruction in 36.4 versus 30.5%, respectively (HR 1.44, 95% CI 0.98-2.12, P = 0.065). The median (interquartile range) daily nursing workload for manual repositioning was 21 (14-27) versus 11 min/patient (8-15) (P repositioning frequency (2 versus 4 h) in patients under MV and on an APAM did not reduce the incidence of pressure ulcers. However, it did increase device-related adverse events and daily nursing workload.

  11. IRAG working group 2. CAM-based assays. Interagency Regulatory Alternatives Group.

    Science.gov (United States)

    Spielmann, H; Liebsch, M; Moldenhauer, F; Holzhütter, H G; Bagley, D M; Lipman, J M; Pape, W J; Miltenburger, H; de Silva, O; Hofer, H; Steiling, W

    1997-01-01

    CAM-based assays, in which test material is applied to the chorion allantoic membrane (CAM) of embryonated chicken eggs, were assessed as alternatives to the Draize eye irritation test. Two general types of CAM-based assays are currently in use, the HET-CAM test and the CAMVA assay. Evaluations were made of five data sets produced with three different modifications of the HET-CAM test and two data sets obtained with the same CAMVA protocol. Data sets consisted of 9-133 test chemicals, usually from the sponsor's product line, and also from a validation trial. Each data set and assay protocol were analysed for quality of data, purpose and proposed use of the assay, range of responses covered, range of test materials amenable, current use in safety and risk assessment both in-house and for regulatory purposes. Since the MMAS Draize score was not available for all in vivo data sets, the sigma MMMIS, which correlates well with the MMAS, was used instead. In vitro/in vivo correlations calculated with Pearson's linear coefficient ranged from r = 0.6 to r = 0.9 for six of seven data sets. Corneal opacity and inflammation of the iris showed the best correlation to in vitro data. Prediction rates were significantly improved when partial linear regression was used, and the predictivity of three different HET-CAM protocols was almost the same. HET-CAM assays showed the best prediction with surfactants and surfactant-based formulations, whereas the CAMVA assay provided the best performance with alcohols.

  12. CMS multicore scheduling strategy

    International Nuclear Information System (INIS)

    Yzquierdo, Antonio Pérez-Calero; Hernández, Jose; Holzman, Burt; Majewski, Krista; McCrea, Alison

    2014-01-01

    In the next years, processor architectures based on much larger numbers of cores will be most likely the model to continue 'Moore's Law' style throughput gains. This not only results in many more jobs in parallel running the LHC Run 1 era monolithic applications, but also the memory requirements of these processes push the workernode architectures to the limit. One solution is parallelizing the application itself, through forking and memory sharing or through threaded frameworks. CMS is following all of these approaches and has a comprehensive strategy to schedule multicore jobs on the GRID based on the glideinWMS submission infrastructure. The main component of the scheduling strategy, a pilot-based model with dynamic partitioning of resources that allows the transition to multicore or whole-node scheduling without disallowing the use of single-core jobs, is described. This contribution also presents the experiences made with the proposed multicore scheduling schema and gives an outlook of further developments working towards the restart of the LHC in 2015.

  13. The Problem-Oriented Project Work (PPL) Alternative in Self-Diected Higher Education

    DEFF Research Database (Denmark)

    Andersen, Anders Siig; Heilesen, Simon

    2015-01-01

    This chapter introduces an approach to higher education developed and practiced over four decades at Roskilde University in Denmark. Known as the Roskilde Model, the approach is characterized by (1) a special type of self-directed learning (SDL), named “problem-oriented project learning” (PPL); (2......) a way of organizing undergraduate education into broad interdisciplinary programs; and (3) an interdisciplinary profile where double-major graduate programs allow students to design their own academic and professional profiles. The chapter first explains similarities and differences between PPL and some...... related concepts of SDL: problem-based learning (PBL), inquiry-based learning, and project learning. Secondly, it outlines the origins and development of Roskilde University and of PPL. Thirdly, it introduces and discusses the building blocks and workings of PPL: problem-orientation, interdisciplinarity...

  14. Vehicle and driver scheduling for public transit.

    Science.gov (United States)

    2009-08-01

    The problem of driver scheduling involves the construction of a legal set of shifts, including allowance : of overtime, which cover the blocks in a particular vehicle schedule. A shift is the work scheduled to be performed by : a driver in one day, w...

  15. Alternating Syntagm on the Texture of the Work En blanc et noir by Debussy: An Analogy to Silent Film

    Directory of Open Access Journals (Sweden)

    Menan Medeiros Duwe

    2012-12-01

    Full Text Available We will reveal the concept of alternating syntagm as an important feature of cinematic narrative made possible by a certain arrangement off rames during the montage. In the first part of this article we apply the concept as suggested by Rebecca Leydon (2001 to show that analogous situations can be identified in the music of Debussy's late period by using a representative sample: episodes in the second piece of the work En blanc et noir derived from a textural analysis that is based on Wallace Berry’s theories (1987. This analytical approach will allow us to discuss in the second part of the article the possibility of establishing analogies between Debussy’s works and silent film, within the context of the period of question, comparing Leydon’s proposal to Scott Paulin (2010 criticism on this subject. The discussion calls attention to the correlation between artistic media tending to imitate the thought processes of the early twentieth century.

  16. Agile Systems Engineering-Kanban Scheduling Subsection

    Science.gov (United States)

    2017-03-10

    Agile Systems Engineering – Kanban Scheduling Subsection Technical Report SERC-2017-TR-104 March 10, 2017 Principal Investigator: Dr...scheduling systems based on explicit, transparent, and continuously updated value of work [6], [7], [8]. This Kanban -based Scheduling System Network (KSSN...and literature searches. • RT-35/35A, Agile-Lean Software Engineering (ALSE) Evaluating Kanban in SE, focused on using pull scheduling techniques

  17. Network scheduling at Belene NPP construction site

    International Nuclear Information System (INIS)

    Matveev, A.

    2010-01-01

    Four types of schedules differing in the level of their detail are singled out to enhance the efficiency of Belene NPP Project implementation planning and monitoring: Level 1 Schedule–Summary Integrated Overall Time Schedule (SIOTS) is an appendix to EPC Contract. The main purpose of SIOTS is the large scale presentation of the current information on the Project implementation. Level 2 Schedule–Integrated Overall Time Schedule (IOTS)is the contract schedule for the Contractor (ASE JSC) and their subcontractors.The principal purpose of IOTS is the work progress planning and monitoring, the analysis of the effect of activities implementation upon the progress of the Project as a whole. IOTS is the reporting schedule at the Employer –Contractor level. Level 3 Schedules, Detail Time Schedules(DTS) are developed by those who actually perform the work and are agreed upon with Atomstroyexport JSC.The main purpose of DTS is the detail planning of Atomstroyexport subcontractor's activities. DTSare the reporting schedules at the level of Contractor-Subcontractor. Level 4 Schedules are the High Detail Time Schedules (HDTS), which are the day-to-day plans of work implementation and are developed, as a rule, for a week's time period.Each lower level time schedule details the activities of the higher level time schedule

  18. Alternative Submarine Watch Systems: Recommendation for a New CF Submarine Watch Schedule (Systemes Differents d’Horaire de Garde a Bord des Sous-Marins: Nouvel Horaire Recommande Pour les Sous-Marins des FC)

    Science.gov (United States)

    2010-01-01

    facilitated either by caffeinated chewing gum or modafinil , which is an alertness enhancing drug that has been shown in DRDC Toronto studies to be...watch system. Conclusion: The conclusion of the study group was that the alternative 1-in-2 watch system appears to represented a 23% overall increase...important studies (Arnedt et al. 2001; Dawson and Reid 1997; Lamond and Dawson 1999). • The abscissa (x-axis) illustrates periods of work (red bars

  19. Planning and scheduling - A schedule's performance

    International Nuclear Information System (INIS)

    Whitman, N.M.

    1993-01-01

    Planning and scheduling is a process whose time has come to PSI Energy. With an awareness of the challenges ahead, individuals must look for ways to enhance the corporate competitiveness. Working toward this goal means that each individual has to dedicate themselves to this more competitive corporate environment. Being competitive may be defined as the ability of each employee to add value to the corporation's economic well being. The timely and successful implementation of projects greatly enhances competitiveness. Those projects that do not do well often suffer from lack of proper execution - not for lack of talent or strategic vision. Projects are consumers of resources such as cash and people. They produce a return when completed and will generate a better return when properly completed utilizing proven project management techniques. Completing projects on time, within budget and meeting customer expectations is the way a corporation builds it's future. This paper offers suggestions on implementing planning and scheduling and provides a review of results in the form of management reports

  20. Routing and scheduling problems

    DEFF Research Database (Denmark)

    Reinhardt, Line Blander

    be that the objects routed have an availability time window and a delivery time window or that locations on the path have a service time window. When routing moving transportation objects such as vehicles and vessels schedules are made in connection with the routing. Such schedules represent the time for the presence......In today’s globalized society, transport contributes to our daily life in many different ways. The production of the parts for a shelf ready product may take place on several continents and our travel between home and work, vacation travel and business trips has increased in distance the last...... couple of decades. To deliver competitive service and price, transportation today needs to be cost effective. A company requiring for things to be shipped will aim at having the freight shipped as cheaply as possible while often satisfying certain time constraints. For the transportation company...

  1. Records Control Schedules Repository

    Data.gov (United States)

    National Archives and Records Administration — The Records Control Schedules (RCS) repository provides access to scanned versions of records schedules, or Standard Form 115, Request for Records Disposition...

  2. Current experimental work related to a system alternative to that using the cryogenic separation of hydrogen isotopes

    International Nuclear Information System (INIS)

    Pierini, G.; Spelta, B.; Rizzello, C.

    1985-01-01

    The feasibility study of an alternative exhaust plasma process based mainly on the handling of tritiated waters had shown that it could be competitive as some units used in the isotopic separation system (ISS) could attain the performance required in the conceptual design. In particular, the two cells operating in the ISS should have confirmed, first the high separation factor between protium and tritium found in the literature, second the possibility of working at very low liquid (electrolyte) inventory or, in other words, tritium inventory. Moreover, research has been undertaken in order to investigate the preparation and charcterization of some types of separators which should be resistent to the beta radiation of tritiated water

  3. Concurrent variable-interval variable-ratio schedules in a dynamic choice environment.

    Science.gov (United States)

    Bell, Matthew C; Baum, William M

    2017-11-01

    Most studies of operant choice have focused on presenting subjects with a fixed pair of schedules across many experimental sessions. Using these methods, studies of concurrent variable- interval variable-ratio schedules helped to evaluate theories of choice. More recently, a growing literature has focused on dynamic choice behavior. Those dynamic choice studies have analyzed behavior on a number of different time scales using concurrent variable-interval schedules. Following the dynamic choice approach, the present experiment examined performance on concurrent variable-interval variable-ratio schedules in a rapidly changing environment. Our objectives were to compare performance on concurrent variable-interval variable-ratio schedules with extant data on concurrent variable-interval variable-interval schedules using a dynamic choice procedure and to extend earlier work on concurrent variable-interval variable-ratio schedules. We analyzed performances at different time scales, finding strong similarities between concurrent variable-interval variable-interval and concurrent variable-interval variable- ratio performance within dynamic choice procedures. Time-based measures revealed almost identical performance in the two procedures compared with response-based measures, supporting the view that choice is best understood as time allocation. Performance at the smaller time scale of visits accorded with the tendency seen in earlier research toward developing a pattern of strong preference for and long visits to the richer alternative paired with brief "samples" at the leaner alternative ("fix and sample"). © 2017 Society for the Experimental Analysis of Behavior.

  4. Heuristic Scheduling in Grid Environments: Reducing the Operational Energy Demand

    Science.gov (United States)

    Bodenstein, Christian

    In a world where more and more businesses seem to trade in an online market, the supply of online services to the ever-growing demand could quickly reach its capacity limits. Online service providers may find themselves maxed out at peak operation levels during high-traffic timeslots but too little demand during low-traffic timeslots, although the latter is becoming less frequent. At this point deciding which user is allocated what level of service becomes essential. The concept of Grid computing could offer a meaningful alternative to conventional super-computing centres. Not only can Grids reach the same computing speeds as some of the fastest supercomputers, but distributed computing harbors a great energy-saving potential. When scheduling projects in such a Grid environment however, simply assigning one process to a system becomes so complex in calculation that schedules are often too late to execute, rendering their optimizations useless. Current schedulers attempt to maximize the utility, given some sort of constraint, often reverting to heuristics. This optimization often comes at the cost of environmental impact, in this case CO 2 emissions. This work proposes an alternate model of energy efficient scheduling while keeping a respectable amount of economic incentives untouched. Using this model, it is possible to reduce the total energy consumed by a Grid environment using 'just-in-time' flowtime management, paired with ranking nodes by efficiency.

  5. Use of complementary and alternative medicine for work-related pain correlates with career satisfaction among dental hygienists.

    Science.gov (United States)

    Chismark, Aubreé; Asher, Gary; Stein, Margot; Tavoc, Tabitha; Curran, Alice

    2011-01-01

    Chronic musculoskeletal pain (CMSP) is associated with work stress and burn-out among registered dental hygienists, with prevalence estimates ranging between 64 to 93%. Complementary and alternative medicine (CAM) therapies can be helpful in managing CMSP. The purpose of this study was to determine if dental hygienists who use CAM have greater career satisfaction compared to conventional therapy (CT) users. ADHA members (n=2,431) in North Carolina (n=573) and California (n=1,858) were surveyed. Data were analyzed using univariate and bivariate analyses and logistic regression. A response rate of 25.3% (n=617) was obtained, revealing that 76.5% (n=472) suffered from CMSP. The use of CAM or CT was reported among 80.7% (n=381) of dental hygienists with CMSP. CAM users reported greater overall health (79.3% vs. 54.0%, pCAM therapies may improve quality of life, reduce work disruptions and enhance career satisfaction for dental hygienists who suffer from CMSP. Ergonomics education may help reduce the number of hygienists who suffer from CMSP. Increased student awareness of CMSP risk is needed to reduce CMSP in the future by enhancing ergonomics education and incorporating CAM, such as yoga stretches, into the classroom and clinic routine.

  6. Widening the Schedulability Hierarchical Scheduling Systems

    DEFF Research Database (Denmark)

    Boudjadar, Jalil; David, Alexandre; Kim, Jin Hyun

    2014-01-01

    This paper presents a compositional approach for schedula- bility analysis of hierarchical systems, which enables to prove more sys- tems schedulable by having richer and more detailed scheduling models. We use a lightweight method (statistical model checking) for design ex- ploration, easily ass...

  7. Optimizing Music Learning: Exploring How Blocked and Interleaved Practice Schedules Affect Advanced Performance.

    Science.gov (United States)

    Carter, Christine E; Grahn, Jessica A

    2016-01-01

    Repetition is the most commonly used practice strategy by musicians. Although blocks of repetition continue to be suggested in the pedagogical literature, work in the field of cognitive psychology suggests that repeated events receive less processing, thereby reducing the potential for long-term learning. Motor skill learning and sport psychology research offer an alternative. Instead of using a blocked practice schedule, with practice completed on one task before moving on to the next task, an interleaved schedule can be used, in which practice is frequently alternated between tasks. This frequent alternation involves more effortful processing, resulting in increased long-term learning. The finding that practicing in an interleaved schedule leads to better retention than practicing in a blocked schedule has been labeled the "contextual interference effect." While the effect has been observed across a wide variety of fields, few studies have researched this phenomenon in a music-learning context, despite the broad potential for application to music practice. This study compared the effects of blocked and interleaved practice schedules on advanced clarinet performance in an ecologically valid context. Ten clarinetists were given one concerto exposition and one technical excerpt to practice in a blocked schedule (12 min per piece) and a second concerto exposition and technical excerpt to practice in an interleaved schedule (3 min per piece, alternating until a total of 12 min of practice were completed on each piece). Participants sight-read the four pieces prior to practice and performed them at the end of practice and again one day later. The sight-reading and two performance run-throughs of each piece were recorded and given to three professional clarinetists to rate using a percentage scale. Overall, whenever there was a ratings difference between the conditions, pieces practiced in the interleaved schedule were rated better than those in the blocked schedule

  8. Optimizing music learning: Exploring how blocked and interleaved practice schedules affect advanced performance

    Directory of Open Access Journals (Sweden)

    Christine E Carter

    2016-08-01

    Full Text Available Repetition is the most commonly used practice strategy by musicians. Although blocks of repetition continue to be suggested in the pedagogical literature, work in the field of cognitive psychology suggests that repeated events receive less processing, thereby reducing the potential for long-term learning. Motor skill learning and sport psychology research offer an alternative. Instead of using a blocked practice schedule, with practice completed on one task before moving on to the next task, an interleaved schedule can be used, in which practice is frequently alternated between tasks. This frequent alternation involves more effortful processing, resulting in increased long-term learning. The finding that practicing in an interleaved schedule leads to better retention than practicing in a blocked schedule has been labeled the contextual interference effect. While the effect has been observed across a wide variety of fields, few studies have researched this phenomenon in a music-learning context, despite the broad potential for application to music practice. This study compared the effects of blocked and interleaved practice schedules on advanced clarinet performance in an ecologically valid context. Ten clarinetists were given one concerto exposition and one technical excerpt to practice in a blocked schedule (twelve minutes per piece and a second concerto exposition and technical excerpt to practice in an interleaved schedule (three minutes per piece, alternating until a total of twelve minutes of practice were completed on each piece. Participants sight-read the four pieces prior to practice and performed them at the end of practice and again one day later. The sight-reading and two performance run-throughs of each piece were recorded and given to three professional clarinetists to rate using a percentage scale. Overall, whenever there was a ratings difference between the conditions, pieces practiced in the interleaved schedule were rated

  9. Optimizing Music Learning: Exploring How Blocked and Interleaved Practice Schedules Affect Advanced Performance

    Science.gov (United States)

    Carter, Christine E.; Grahn, Jessica A.

    2016-01-01

    Repetition is the most commonly used practice strategy by musicians. Although blocks of repetition continue to be suggested in the pedagogical literature, work in the field of cognitive psychology suggests that repeated events receive less processing, thereby reducing the potential for long-term learning. Motor skill learning and sport psychology research offer an alternative. Instead of using a blocked practice schedule, with practice completed on one task before moving on to the next task, an interleaved schedule can be used, in which practice is frequently alternated between tasks. This frequent alternation involves more effortful processing, resulting in increased long-term learning. The finding that practicing in an interleaved schedule leads to better retention than practicing in a blocked schedule has been labeled the “contextual interference effect.” While the effect has been observed across a wide variety of fields, few studies have researched this phenomenon in a music-learning context, despite the broad potential for application to music practice. This study compared the effects of blocked and interleaved practice schedules on advanced clarinet performance in an ecologically valid context. Ten clarinetists were given one concerto exposition and one technical excerpt to practice in a blocked schedule (12 min per piece) and a second concerto exposition and technical excerpt to practice in an interleaved schedule (3 min per piece, alternating until a total of 12 min of practice were completed on each piece). Participants sight-read the four pieces prior to practice and performed them at the end of practice and again one day later. The sight-reading and two performance run-throughs of each piece were recorded and given to three professional clarinetists to rate using a percentage scale. Overall, whenever there was a ratings difference between the conditions, pieces practiced in the interleaved schedule were rated better than those in the blocked schedule

  10. Immunization Schedules for Adults

    Science.gov (United States)

    ... ACIP Vaccination Recommendations Why Immunize? Vaccines: The Basics Immunization Schedule for Adults (19 Years of Age and ... diseases that can be prevented by vaccines . 2018 Immunization Schedule Recommended Vaccinations for Adults by Age and ...

  11. Instant Childhood Immunization Schedule

    Science.gov (United States)

    ... Recommendations Why Immunize? Vaccines: The Basics Instant Childhood Immunization Schedule Recommend on Facebook Tweet Share Compartir Get ... date. See Disclaimer for additional details. Based on Immunization Schedule for Children 0 through 6 Years of ...

  12. Endogenous scheduling preferences and congestion

    DEFF Research Database (Denmark)

    Fosgerau, Mogens; Small, Kenneth

    2010-01-01

    and leisure, but agglomeration economies at home and at work lead to scheduling preferences forming endogenously. Using bottleneck congestion technology, we obtain an equilibrium queuing pattern consistent with a general version of the Vickrey bottleneck model. However, the policy implications are different...

  13. Stochastic Online Scheduling on Unrelated Machines

    NARCIS (Netherlands)

    Gupta, Varun; Moseley, Benjamin; Uetz, Marc Jochen; Xie, Qiaomin

    2016-01-01

    We derive the first performance guarantees for a combinatorial online algorithm that schedules stochastic, nonpreemptive jobs on unrelated machines to minimize the expectation of the total weighted completion time. Prior work on unrelated machine scheduling with stochastic jobs was restricted to the

  14. Multiuser switched diversity scheduling schemes

    KAUST Repository

    Shaqfeh, Mohammad

    2012-09-01

    Multiuser switched-diversity scheduling schemes were recently proposed in order to overcome the heavy feedback requirements of conventional opportunistic scheduling schemes by applying a threshold-based, distributed, and ordered scheduling mechanism. The main idea behind these schemes is that slight reduction in the prospected multiuser diversity gains is an acceptable trade-off for great savings in terms of required channel-state-information feedback messages. In this work, we characterize the achievable rate region of multiuser switched diversity systems and compare it with the rate region of full feedback multiuser diversity systems. We propose also a novel proportional fair multiuser switched-based scheduling scheme and we demonstrate that it can be optimized using a practical and distributed method to obtain the feedback thresholds. We finally demonstrate by numerical examples that switched-diversity scheduling schemes operate within 0.3 bits/sec/Hz from the ultimate network capacity of full feedback systems in Rayleigh fading conditions. © 2012 IEEE.

  15. Specific schedule conditions for the formation of personnel of A or B category working in nuclear facilities. Option nuclear reactor-borne

    International Nuclear Information System (INIS)

    2002-01-01

    This document describes the specific dispositions relative to the nuclear reactor-borne domain, for the formation to the conventional and radiation risks prevention of personnel of A or B category working in nuclear facilities. The application domain, the applicable documents, the liability, the specificity of the nuclear reactor-borne and of the retraining, the Passerelle formation, are presented. (A.L.B.)

  16. Envelhecimento e trabalho: um desafio para a agenda da reabilitação Aging and work: a challenge for the rehabilitation schedule

    Directory of Open Access Journals (Sweden)

    Rosana F. Sampaio

    2012-04-01

    Full Text Available CONTEXTUALIZAÇÃO: O envelhecimento acelerado da população trabalhadora tem motivado o desenvolvimento de estudos que buscam manter boas condições de saúde, capacidade para o trabalho (CT, autonomia e integração social dos trabalhadores. OBJETIVOS: Apresentar o arcabouço teórico, as mensurações disponíveis e os modelos de promoção da CT. DISCUSSÃO: No campo da reabilitação, a sedimentação do modelo conceitual de CT tem função normativa e pode ser útil para avaliar o que é necessário para se classificar uma pessoa com perda temporária ou permanente da CT e definir um programa de reabilitação específico. O conceito pode ajudar ainda a determinar diferentes aspectos, internos e externos à pessoa, os quais podem contribuir para melhorar ou restaurar a sua capacidade para o trabalho. CONCLUSÃO: Para se aprofundar nas mensurações disponíveis, propor novas aferições e intervenções para promover a CT, além de potencializar seu uso como desfecho na reabilitação, é necessário assumir que os preditores se relacionam com o indivíduo, o trabalho e a vida fora do trabalho a partir de interações dinâmicas, que exigem métodos analíticos que deem conta da multidimensionalidade do constructo.BACKGROUND: The rapid aging of the workforce has motivated the development of studies that seek to maintain good health conditions, work ability, autonomy and the social integration of workers. OBJECTIVES: To present the theoretical framework, available measurements and models for promoting work ability. DISCUSSION: In the field of rehabilitation, the sedimentation of the conceptual model of the ability to work has a normative role and may be useful for assessing whether a person has a temporary or permanent loss of capacity as well as for defining a specific rehabilitation program. The concept may further help determine different aspects, both internal and external to the person, that could result in improved or restored work

  17. CMS Planning and Scheduling System

    CERN Document Server

    Kotamaki, M

    1998-01-01

    The paper describes the procedures and the system to build and maintain the schedules needed to manage time, resources, and progress of the CMS project. The system is based on the decomposition of the project into work packages, which can be each considered as a complete project with its own structure. The system promotes the distribution of the decision making and responsibilities to lower levels in the organisation by providing a state-of-the-art system to formalise the external commitments of the work packages without limiting their ability to modify their internal schedules to best meet their commitments. The system lets the project management focus on the interfaces between the work packages and alerts the management immediately if a conflict arises. The proposed system simplifies the planning and management process and eliminates the need for a large, centralised project management system.

  18. Schedule-Aware Workflow Management Systems

    Science.gov (United States)

    Mans, Ronny S.; Russell, Nick C.; van der Aalst, Wil M. P.; Moleman, Arnold J.; Bakker, Piet J. M.

    Contemporary workflow management systems offer work-items to users through specific work-lists. Users select the work-items they will perform without having a specific schedule in mind. However, in many environments work needs to be scheduled and performed at particular times. For example, in hospitals many work-items are linked to appointments, e.g., a doctor cannot perform surgery without reserving an operating theater and making sure that the patient is present. One of the problems when applying workflow technology in such domains is the lack of calendar-based scheduling support. In this paper, we present an approach that supports the seamless integration of unscheduled (flow) and scheduled (schedule) tasks. Using CPN Tools we have developed a specification and simulation model for schedule-aware workflow management systems. Based on this a system has been realized that uses YAWL, Microsoft Exchange Server 2007, Outlook, and a dedicated scheduling service. The approach is illustrated using a real-life case study at the AMC hospital in the Netherlands. In addition, we elaborate on the experiences obtained when developing and implementing a system of this scale using formal techniques.

  19. Program reference schedule baseline

    International Nuclear Information System (INIS)

    1986-07-01

    This Program Reference Schedule Baseline (PRSB) provides the baseline Program-level milestones and associated schedules for the Civilian Radioactive Waste Management Program. It integrates all Program-level schedule-related activities. This schedule baseline will be used by the Director, Office of Civilian Radioactive Waste Management (OCRWM), and his staff to monitor compliance with Program objectives. Chapter 1 includes brief discussions concerning the relationship of the PRSB to the Program Reference Cost Baseline (PRCB), the Mission Plan, the Project Decision Schedule, the Total System Life Cycle Cost report, the Program Management Information System report, the Program Milestone Review, annual budget preparation, and system element plans. Chapter 2 includes the identification of all Level 0, or Program-level, milestones, while Chapter 3 presents and discusses the critical path schedules that correspond to those Level 0 milestones

  20. Schedule of average annual equipment ownership expense

    Science.gov (United States)

    2003-03-06

    The "Schedule of Average Annual Equipment Ownership Expense" is designed for use on Force Account bills of Contractors performing work for the Illinois Department of Transportation and local government agencies who choose to adopt these rates. This s...

  1. MEDICAL STAFF SCHEDULING USING SIMULATED ANNEALING

    Directory of Open Access Journals (Sweden)

    Ladislav Rosocha

    2015-07-01

    Full Text Available Purpose: The efficiency of medical staff is a fundamental feature of healthcare facilities quality. Therefore the better implementation of their preferences into the scheduling problem might not only rise the work-life balance of doctors and nurses, but also may result into better patient care. This paper focuses on optimization of medical staff preferences considering the scheduling problem.Methodology/Approach: We propose a medical staff scheduling algorithm based on simulated annealing, a well-known method from statistical thermodynamics. We define hard constraints, which are linked to legal and working regulations, and minimize the violations of soft constraints, which are related to the quality of work, psychic, and work-life balance of staff.Findings: On a sample of 60 physicians and nurses from gynecology department we generated monthly schedules and optimized their preferences in terms of soft constraints. Our results indicate that the final value of objective function optimized by proposed algorithm is more than 18-times better in violations of soft constraints than initially generated random schedule that satisfied hard constraints.Research Limitation/implication: Even though the global optimality of final outcome is not guaranteed, desirable solutionwas obtained in reasonable time. Originality/Value of paper: We show that designed algorithm is able to successfully generate schedules regarding hard and soft constraints. Moreover, presented method is significantly faster than standard schedule generation and is able to effectively reschedule due to the local neighborhood search characteristics of simulated annealing.

  2. Cure Schedule for Stycast 2651/Catalyst 11.

    Energy Technology Data Exchange (ETDEWEB)

    Kropka, Jamie Michael [Sandia National Lab. (SNL-NM), Albuquerque, NM (United States); McCoy, John D. [New Mexico Inst. of Mining and Technology, Socorro, NM (United States)

    2017-11-01

    The Henkel technical data sheet (TDS) for Stycast 2651/Catalyst 11 lists three alternate cure schedules for the material, each of which would result in a different state of reaction and different material properties. Here, a cure schedule that attains full reaction of the material is defined. The use of this cure schedule will eliminate variance in material properties due to changes in the cure state of the material, and the cure schedule will serve as the method to make material prior to characterizing properties. The following recommendation was motivated by (1) a desire to cure at a single temperature for ease of manufacture and (2) a desire to keep the cure temperature low (to minimize residual stress build-up associated with the cooldown from the cure temperature to room temperature) without excessively limiting the cure reaction due to vitrification (i.e., material glass transition temperature, Tg, exceeding cure temperature).

  3. The triangle scheduling problem

    NARCIS (Netherlands)

    Dürr, Christoph; Hanzálek, Zdeněk; Konrad, Christian; Seddik, Yasmina; Sitters, R.A.; Vásquez, Óscar C.; Woeginger, Gerhard

    2017-01-01

    This paper introduces a novel scheduling problem, where jobs occupy a triangular shape on the time line. This problem is motivated by scheduling jobs with different criticality levels. A measure is introduced, namely the binary tree ratio. It is shown that the Greedy algorithm solves the problem to

  4. A feature model and development approach for schedulers

    NARCIS (Netherlands)

    Hatun, Kardelen; Bockisch, Christoph; Sözer, Hasan; Aksit, Mehmet

    Schedulers decide when to execute what in a system. They often work in constrained environments, where these decisions have high impact on performance. Since schedulers should be designed according to a system's needs, it is imperative that scheduling requirements are well defined. Building a

  5. Intensive Scheduling: When Less Is More.

    Science.gov (United States)

    Ryan, Francis, J.

    1996-01-01

    Examines the potential benefits of intensive scheduling, an alternative to traditional school day structuring that allows students to take fewer classes but stay in them longer. Suggests that fewer and longer classes accommodate more cooperative learning styles and enhance student academic performance. Includes descriptions of several intensive…

  6. Integrating Preventive Maintenance Scheduling As Probability Machine Failure And Batch Production Scheduling

    Directory of Open Access Journals (Sweden)

    Zahedi Zahedi

    2016-06-01

    Full Text Available This paper discusses integrated model of batch production scheduling and machine maintenance scheduling. Batch production scheduling uses minimize total actual flow time criteria and machine maintenance scheduling uses the probability of machine failure based on Weibull distribution. The model assumed no nonconforming parts in a planning horizon. The model shows an increase in the number of the batch (length of production run up to a certain limit will minimize the total actual flow time. Meanwhile, an increase in the length of production run will implicate an increase in the number of PM. An example was given to show how the model and algorithm work.

  7. The Probability of Small Schedule Values and Preference for Random-Interval Schedules

    Science.gov (United States)

    Soreth, Michelle Ennis; Hineline, Philip N.

    2009-01-01

    Preference for working on variable schedules and temporal discrimination were simultaneously examined in two experiments using a discrete-trial, concurrent-chains arrangement with fixed interval (FI) and random interval (RI) terminal links. The random schedule was generated by first sampling a probability distribution after the programmed delay to…

  8. Effects of Block Scheduling

    Directory of Open Access Journals (Sweden)

    William R. Veal

    1999-09-01

    Full Text Available This study examined the effects of a tri-schedule on the academic achievement of students in a high school. The tri-schedule consists of traditional, 4x4 block, and hybrid schedules running at the same time in the same high school. Effectiveness of the schedules was determined from the state mandated test of basic skills in reading, language, and mathematics. Students who were in a particular schedule their freshman year were tested at the beginning of their sophomore year. A statistical ANCOVA test was performed using the schedule types as independent variables and cognitive skill index and GPA as covariates. For reading and language, there was no statistically significant difference in test results. There was a statistical difference mathematics-computation. Block mathematics is an ideal format for obtaining more credits in mathematics, but the block format does little for mathematics achievement and conceptual understanding. The results have content specific implications for schools, administrations, and school boards who are considering block scheduling adoption.

  9. How community action, science and common sense can work together to develop an alternative way to combat desertification.

    Science.gov (United States)

    Bethune, Shirley; Schachtschneider, Klaudia

    2004-12-01

    The Spitzkoppe Community Campsite in western Namibia lies in an area with very limited water resources. Water scarcity places a constraint on community income generation and development opportunities. The existing water resources are overexploited and to ensure future water security, the community must take sustainable water management into consideration in their daily lives and business ventures, including tourism. This has been successfully achieved at the Spitzkoppe Community Campsite through a combination of high community motivation, organisation and action, the involvement of researchers and trainers in water resource management and support from developers. The most appropriate water management solutions were found through ongoing practical testing of different strategies and technologies over two years. This paper presents a case study of a community-based tourist camp at Spitzkoppe and traces the community's progress towards developing an alternative way to combat desertification and a potentially lucrative tourist business.

  10. 10 CFR 490.302 - Vehicle acquisition mandate schedule.

    Science.gov (United States)

    2010-01-01

    ... 10 Energy 3 2010-01-01 2010-01-01 false Vehicle acquisition mandate schedule. 490.302 Section 490... Alternative Fuel Provider Vehicle Acquisition Mandate § 490.302 Vehicle acquisition mandate schedule. (a) Except as provided in section 490.304 of this part, of the light duty motor vehicles newly acquired by a...

  11. Physician Fee Schedule Search

    Data.gov (United States)

    U.S. Department of Health & Human Services — This website is designed to provide information on services covered by the Medicare Physician Fee Schedule (MPFS). It provides more than 10,000 physician services,...

  12. Project Schedule Simulation

    DEFF Research Database (Denmark)

    Mizouni, Rabeb; Lazarova-Molnar, Sanja

    2015-01-01

    Despite several attempts to accurately predict duration and cost of software projects, initial plans still do not reflect real-life situations. Since commitments with customers are usually decided based on these initial plans, software companies frequently fail to deliver on time and many projects...... overrun both their budget and time. To improve the quality of initial project plans, we show in this paper the importance of (1) reflecting features’ priorities/risk in task schedules and (2) considering uncertainties related to human factors in plan schedules. To make simulation tasks reflect features......’ priority as well as multimodal team allocation, enhanced project schedules (EPS), where remedial actions scenarios (RAS) are added, were introduced. They reflect potential schedule modifications in case of uncertainties and promote a dynamic sequencing of involved tasks rather than the static conventional...

  13. CMS Records Schedule

    Data.gov (United States)

    U.S. Department of Health & Human Services — The CMS Records Schedule provides disposition authorizations approved by the National Archives and Records Administration (NARA) for CMS program-related records...

  14. DMEPOS Fee Schedule

    Data.gov (United States)

    U.S. Department of Health & Human Services — The list contains the fee schedule amounts, floors, and ceilings for all procedure codes and payment category, jurisdication, and short description assigned to each...

  15. Childhood Vaccine Schedule

    Science.gov (United States)

    ... Navigation Bar Home Current Issue Past Issues Childhood Vaccine Schedule Past Issues / Spring 2008 Table of Contents ... please turn Javascript on. When to Vaccinate What Vaccine Why Birth (or any age if not previously ...

  16. CERN confirms LHC schedule

    CERN Multimedia

    2003-01-01

    The CERN Council held its 125th session on 20 June. Highlights of the meeting included confirmation that the LHC is on schedule for a 2007 start-up, and the announcement of a new organizational structure in 2004.

  17. Fee Schedules - General Information

    Data.gov (United States)

    U.S. Department of Health & Human Services — A fee schedule is a complete listing of fees used by Medicare to pay doctors or other providers-suppliers. This comprehensive listing of fee maximums is used to...

  18. Clinical Laboratory Fee Schedule

    Data.gov (United States)

    U.S. Department of Health & Human Services — Outpatient clinical laboratory services are paid based on a fee schedule in accordance with Section 1833(h) of the Social Security Act. The clinical laboratory fee...

  19. ATLAS construction schedule

    CERN Multimedia

    Kotamaki, M

    The goal during the last few months has been to freeze and baseline as much as possible the schedules of various ATLAS systems and activities. The main motivations for the re-baselining of the schedules have been the new LHC schedule aiming at first collisions in early 2006 and the encountered delays in civil engineering as well as in the production of some of the detectors. The process was started by first preparing a new installation schedule that takes into account all the new external constraints and the new ATLAS staging scenario. The installation schedule version 3 was approved in the March EB and it provides the Ready For Installation (RFI) milestones for each system, i.e. the date when the system should be available for the start of the installation. TCn is now interacting with the systems aiming at a more realistic and resource loaded version 4 before the end of the year. Using the new RFI milestones as driving dates a new summary schedule has been prepared, or is under preparation, for each system....

  20. Transient thermal model of passenger car's cabin and implementation to saturation cycle with alternative working fluids

    International Nuclear Information System (INIS)

    Lee, Hoseong; Hwang, Yunho; Song, Ilguk; Jang, Kilsang

    2015-01-01

    A transient thermal model of a passenger car's cabin is developed to investigate the dynamic behavior of cabin thermal conditions. The model is developed based on a lumped-parameter model and solved using integral methods. Solar radiation, engine heat through the firewall, and engine heat to the air ducts are all considered. Using the thermal model, transient temperature profiles of the interior mass and cabin air are obtained. This model is used to investigate the transient behavior of the cabin under various operating conditions: the recirculation mode in the idling state, the fresh air mode in the idling state, the recirculation mode in the driving state, and fresh air mode in the driving state. The developed model is validated by comparing with experimental data and is within 5% of deviation. The validated model is then applied for evaluating the mobile air conditioning system's design. The study found that a saturation cycle concept (four-stage cycle with two-phase refrigerant injection) could improve the system efficiency by 23.9% and reduce the power consumption by 19.3%. Lastly, several alternative refrigerants are applied and their performance is discussed. When the saturation cycle concept is applied, R1234yf MAC (mobile air conditioning) shows the largest COP (coefficient of performance) improvement and power consumption reduction. - Highlights: • The transient thermal model of the passenger car cabin is developed. • The developed model is validated with experimental data and showed 5% deviation. • Saturation cycle concept is applied to the developed cabin model. • There is 24% COP improvement by applying the saturation cycle concept. • R1234yf showed the highest potential when it is applied to the saturation cycle.

  1. 2-Layered Architecture of Vague Logic Based Multilevel Queue Scheduler

    Directory of Open Access Journals (Sweden)

    Supriya Raheja

    2014-01-01

    Full Text Available In operating system the decisions which CPU scheduler makes regarding the sequence and length of time the task may run are not easy ones, as the scheduler has only a limited amount of information about the tasks. A good scheduler should be fair, maximizes throughput, and minimizes response time of system. A scheduler with multilevel queue scheduling partitions the ready queue into multiple queues. While assigning priorities, higher level queues always get more priorities over lower level queues. Unfortunately, sometimes lower priority tasks get starved, as the scheduler assures that the lower priority tasks may be scheduled only after the higher priority tasks. While making decisions scheduler is concerned only with one factor, that is, priority, but ignores other factors which may affect the performance of the system. With this concern, we propose a 2-layered architecture of multilevel queue scheduler based on vague set theory (VMLQ. The VMLQ scheduler handles the impreciseness of data as well as improving the starvation problem of lower priority tasks. This work also optimizes the performance metrics and improves the response time of system. The performance is evaluated through simulation using MatLab. Simulation results prove that the VMLQ scheduler performs better than the classical multilevel queue scheduler and fuzzy based multilevel queue scheduler.

  2. Work/Family Balancing and 24/7 Work Schedules: Network Analysis of Strategies in a Transport Company Cleaning Service: Concilier travail-famille et horaires 24/7: analyse réseau des stratégies au sein du service de nettoyage d'une compagnie de transport.

    Science.gov (United States)

    Lefrançois, Mélanie; Saint-Charles, Johanne; Riel, Jessica

    2017-11-01

    Whether or not official work/family balance measures exist within an organization, scheduling accommodations often go through informal channels involving colleagues and superiors and are negotiated within interpersonal relationships. This study examines the relationship dimensions of the scheduling strategies of cleaners working atypical hours in the transport sector through the lenses of ergonomic activity, network, and gender analyses. Using semi-directed interviews, observation, and network analysis, we revealed the effect of gender on relationship dynamics and the influence of these dynamics on work/family balance strategies deployed by cleaners. One of the main contributions of this study is to demonstrate the decisive effect of relationships by revealing inequalities in access to organizational social networks. Creating spaces to discuss work/family balancing and a more equitable circulation of information could contribute to reducing inequalities associated with gender, social status, and family responsibilities and support the work/family strategies developed by workers dealing with restrictive work schedules. Résumé Les accommodements du temps de travail pour la conciliation travail-famille (CTF) passent souvent par des ententes informelles qui s'inscrivent dans les relations entre collègues ou avec des gestionnaires. Notre étude, intégrant l'ergonomie et la communication dans une perspective de genre, porte sur les dimensions relationnelles des stratégies de choix d'horaire d'agentes et agents de nettoyage devant composer avec des horaires atypiques dans le secteur des transports. À partir d'entretiens semi-dirigés, d'observations et d'analyse de réseaux, nous avons pu observer l'influence des dynamiques relationnelles, notamment de genre, sur les stratégies de CTF. Un apport central de cette étude est de montrer l'effet structurant des relations en révélant notamment des inégalités dans l'accès aux ressources facilitant le choix d

  3. Estimating exponential scheduling preferences

    DEFF Research Database (Denmark)

    Hjorth, Katrine; Börjesson, Maria; Engelson, Leonid

    behaviour, based on a theoretical model that has an exponential-exponential specification of H and W and so is more general than the models with the additivity property. We adapt the model to take into account that the marginal utilities of travelling by car and public transport may be different...... drivers commuting to work in the morning in central Stockholm. The survey contains observations of choices between car and public transport travel alternatives, which differ in terms of departure time, monetary cost, and the distribution of travel time. We develop a discrete choice model to describe......Extended abstract Choice of departure time is a travel choice dimension that transportation planners often need to forecast in appraisal. A traveller may shift departure time in response to changes in expected travel time or travel time variability (TTV) or in response to time...

  4. Scheduling nurses’ shifts at PGI Cikini Hospital

    Science.gov (United States)

    Nainggolan, J. C. T.; Kusumastuti, R. D.

    2018-03-01

    Hospitals play an essential role in the community by providing medical services to the public. In order to provide high quality medical services, hospitals must manage their resources (including nurses) effectively and efficiently. Scheduling of nurses’ work shifts, in particular, is crucial, and must be conducted carefully to ensure availability and fairness. This research discusses the job scheduling system for nurses in PGI Cikini Hospital, Jakarta with Goal Programming approach. The research objectives are to identify nurse scheduling criteria and find the best schedule that can meet the criteria. The model has hospital regulations (including government regulations) as hard constraints, and nurses’ preferences as soft constraints. We gather primary data (hospital regulations and nurses’ preferences) through interviews with three Head Nurses and distributing questionnaires to fifty nurses. The results show that on the best schedule, all hard constraints can be satisfied. However, only two out of four soft constraints are satisfied. Compared to current scheduling practice, the resulting schedule ensures the availability of nurses as it satisfies all hospital’s regulations and it has a higher level of fairness as it can accommodate some of the nurses’ preferences.

  5. Concept of Indoor 3D-Route UAV Scheduling System

    DEFF Research Database (Denmark)

    Khosiawan, Yohanes; Nielsen, Izabela Ewa; Do, Ngoc Ang Dung

    2016-01-01

    The objective of the proposed concept is to develop a methodology to support Unmanned Aerial Vehicles (UAVs) operation with a path planning and scheduling system in 3D environments. The proposed 3D path-planning and scheduling allows the system to schedule UAVs routing to perform tasks in 3D indoor...... environment. On top of that, the multi-source productive best-first-search concept also supports efficient real-time scheduling in response to uncertain events. Without human intervention, the proposed work provides an automatic scheduling system for UAV routing problem in 3D indoor environment....

  6. Scheduling Network Traffic for Grid Purposes

    DEFF Research Database (Denmark)

    Gamst, Mette

    This thesis concerns scheduling of network traffic in grid context. Grid computing consists of a number of geographically distributed computers, which work together for solving large problems. The computers are connected through a network. When scheduling job execution in grid computing, data...... transmission has so far not been taken into account. This causes stability problems, because data transmission takes time and thus causes delays to the execution plan. This thesis proposes the integration of job scheduling and network routing. The scientific contribution is based on methods from operations...... research and consists of six papers. The first four considers data transmission in grid context. The last two solves the data transmission problem, where the number of paths per data connection is bounded from above. The thesis shows that it is possible to solve the integrated job scheduling and network...

  7. Experience in scheduled maintenance

    International Nuclear Information System (INIS)

    Tsai, M.T.

    1985-01-01

    As outage management affects both the cost and reliability of a nuclear power plant, performance of a scheduled maintenance outage in an efficient and effective manner is an important task in the operation of nuclear power plant. This paper covers the experience gained in the past ten refueling outages for the two BWR units at the First Nuclear Power Station of Taipower. The key to optimizing both the cost and schedule of a refueling outage is to maintain a high level of quality workmanship. The outage management in planning, scheduling, preparation, coordination, and cooperation, accompanied by the qualified in-house capability and sufficient outside support, have placed the refueling outages at the FNPS in a well controlled situation and have established the capacity factors of these two BWR units at a level which is 20% higher than the world average in the past years

  8. Alternate operating scenarios for NDCX-II

    Energy Technology Data Exchange (ETDEWEB)

    Sharp, W.M., E-mail: wmsharp@lbl.gov [Lawrence Livermore National Laboratory, Livermore, CA, United States of America (United States); Friedman, A.; Grote, D.P.; Cohen, R.H.; Lund, S.M. [Lawrence Livermore National Laboratory, Livermore, CA, United States of America (United States); Vay, J.-L.; Waldron, W.L. [Lawrence Berkeley National Laboratory, Berkeley, CA, United States of America (United States)

    2014-01-01

    NDCX-II is a newly completed accelerator facility at LBNL, built to study ion-heated warm dense matter, as well as aspects of ion-driven targets and intense-beam dynamics for inertial-fusion energy. The baseline design calls for using 12 induction cells to accelerate 30–50 nC of Li{sup +} ions to 1.2 MeV. During commissioning, though, we plan to extend the source lifetime by extracting less total charge. Over time, we expect that NDCX-II will be upgraded to substantially higher energies, necessitating the use of heavier ions to keep a suitable deposition range in targets. For operational flexibility, the option of using a helium plasma source is also being investigated. Each of these options requires development of an alternate acceleration schedule. The schedules here are worked out with a fast-running 1-D particle-in-cell code ASP.

  9. Automated Scheduling Via Artificial Intelligence

    Science.gov (United States)

    Biefeld, Eric W.; Cooper, Lynne P.

    1991-01-01

    Artificial-intelligence software that automates scheduling developed in Operations Mission Planner (OMP) research project. Software used in both generation of new schedules and modification of existing schedules in view of changes in tasks and/or available resources. Approach based on iterative refinement. Although project focused upon scheduling of operations of scientific instruments and other equipment aboard spacecraft, also applicable to such terrestrial problems as scheduling production in factory.

  10. Fuzzy HRRN CPU Scheduling Algorithm

    OpenAIRE

    Bashir Alam; R. Biswas; M. Alam

    2011-01-01

    There are several scheduling algorithms like FCFS, SRTN, RR, priority etc. Scheduling decisions of these algorithms are based on parameters which are assumed to be crisp. However, in many circumstances these parameters are vague. The vagueness of these parameters suggests that scheduler should use fuzzy technique in scheduling the jobs. In this paper we have proposed a novel CPU scheduling algorithm Fuzzy HRRN that incorporates fuzziness in basic HRRN using fuzzy Technique FIS.

  11. Hybrid job shop scheduling

    NARCIS (Netherlands)

    Schutten, Johannes M.J.

    1995-01-01

    We consider the problem of scheduling jobs in a hybrid job shop. We use the term 'hybrid' to indicate that we consider a lot of extensions of the classic job shop, such as transportation times, multiple resources, and setup times. The Shifting Bottleneck procedure can be generalized to deal with

  12. Iterative robust multiprocessor scheduling

    NARCIS (Netherlands)

    Adyanthaya, S.; Geilen, M.; Basten, T.; Voeten, J.; Schiffelers, R.

    2015-01-01

    General purpose platforms are characterized by unpredictable timing behavior. Real-time schedules of tasks on general purpose platforms need to be robust against variations in task execution times. We define robustness in terms of the expected number of tasks that miss deadlines. We present an

  13. Practical job shop scheduling

    NARCIS (Netherlands)

    Schutten, Johannes M.J.

    1998-01-01

    The Shifting Bottleneck procedure is an intuitive and reasonably good approximation algorithm for the notoriously difficult classical job shop scheduling problem. The principle of decomposing a classical job shop problem into a series of single-machine problems can also easily be applied to job shop

  14. Estimating demand schedules in hedonic analysis

    DEFF Research Database (Denmark)

    Panduro, Toke Emil; Jensen, Cathrine Ulla; Lundhede, Thomas

    The hedonic pricing method has been used extensively to obtain implicit prices for availability of urban green space, but few hedonic studies have obtained households’ preference parameters. We estimate willingness to pay functions for park availability in Copenhagen using an approach that places...... an alternative path for estimation of demand schedules for public goods using hedonic data. The findings also stress the importance of paying attention to how public goods are defined when undertaking welfare economic policy analyses....

  15. Prescribed Travel Schedules for Fatigue Management

    Science.gov (United States)

    Whitmire, Alexandra; Johnston, Smith; Lockley, Steven

    2011-01-01

    The NASA Fatigue Management Team is developing recommendations for managing fatigue during travel and for shift work operations, as Clinical Practice Guidelines for the Management of Circadian Desynchrony in ISS Operations. The Guidelines provide the International Space Station (ISS ) flight surgeons and other operational clinicians with evidence-based recommendations for mitigating fatigue and other factors related to sleep loss and circadian desynchronization. As much international travel is involved both before and after flight, the guidelines provide recommendations for: pre-flight training, in-flight operations, and post-flight rehabilitation. The objective of is to standardize the process by which care is provided to crewmembers, ground controllers, and other support personnel such as trainers, when overseas travel or schedule shifting is required. Proper scheduling of countermeasures - light, darkness, melatonin, diet, exercise, and medications - is the cornerstone for facilitating circadian adaptation, improving sleep, enhancing alertness, and optimizing performance. The Guidelines provide, among other things, prescribed travel schedules that outline the specific implementation of these mitigation strategies. Each travel schedule offers evidence based protocols for properly using the NASA identified countermeasures for fatigue. This presentation will describe the travel implementation schedules and how these can be used to alleviate the effects of jet lag and/or schedule shifts.

  16. Working group 2: Alternative energies

    International Nuclear Information System (INIS)

    Gillon, L.

    1976-01-01

    Evaluations and considerations on the reserves of different forms of energy as wood, coal, petroleum, natural gas, shale oil, tar sand, tar shale, water-power, wind, geothermal and fusion power are presented for Belgium and the world. (A.F.)

  17. Alternative 23

    OpenAIRE

    Jackson, Mark

    2014-01-01

    Alternative 23 is a curated exhibition of works by Steve Aylett, David Blandy & Daniel Locke, Let Me Feel Your Finger First, Laura Oldfield Ford, Plastique Fantastique and Henrik Schrat, including the first screening of Let Me Feel Your Finger First’s Postcolonial Capers.\\ud \\ud In 1985 DC Comics in the US had taken the commercial decision to unify the complex and contradictory character story arcs from its various strips such as Superman, Batman and Green Lantern. The resultant crossover ser...

  18. Low-dose memantine induced working memory improvement in the allothetic place avoidance alternation task (APAAT in young adult male rats.

    Directory of Open Access Journals (Sweden)

    Malgorzata Julita Wesierska

    2013-12-01

    Full Text Available N-methyl-D-aspartate receptors (NMDAR are involved in neuronal plasticity. To assess their role simultaneously in spatial working memory and non-cognitive learning, we used NMDAR antagonists and the Allothetic Place Avoidance Alternation Task (APAAT. In this test rats should avoid entering a place where shocks were presented on a rotating arena which requires cognitive coordination for the segregation of stimuli. The experiment took place 30 min after intraperitoneal injection of memantine (5; 10; 20 mg/kg b.w.: MemL, MemM, MemH respectively and (+MK-801 (0.1; 0.2; 0.3 mg/kg b.w.: MK-801L, MK-801M, MK-801H respectively. Rats from the control group were intact or injected with saline (0.2 ml/kg. Over three consecutive days the rats underwent habituation, two avoidance training intervals with shocks, and a retrieval test. The shock sector was alternated daily. The after-effects of the agents were tested on Day21. Rats treated with low dose memantine presented a longer maximum time avoided and fewer entrances than the MemH, MK-801M, MK-801H and Control rats. The shocks per entrances ratio, used as an index of cognitive skill learning, showed skill improvement after D1, except for rats treated by high doses of the agents. The activity levels, indicated by the distance walked, were higher for the groups treated with high doses of the agents. On D21 the MK801H rats performed the memory task better than the MemH rats, whereas the rats’ activity depended on condition, not on the group factor. These results suggest that in naïve rats mild NMDAR blockade by low-dose memantine improves working memory related to a highly challenging task.

  19. Conception of Self-Construction Production Scheduling System

    Science.gov (United States)

    Xue, Hai; Zhang, Xuerui; Shimizu, Yasuhiro; Fujimura, Shigeru

    With the high speed innovation of information technology, many production scheduling systems have been developed. However, a lot of customization according to individual production environment is required, and then a large investment for development and maintenance is indispensable. Therefore now the direction to construct scheduling systems should be changed. The final objective of this research aims at developing a system which is built by it extracting the scheduling technique automatically through the daily production scheduling work, so that an investment will be reduced. This extraction mechanism should be applied for various production processes for the interoperability. Using the master information extracted by the system, production scheduling operators can be supported to accelerate the production scheduling work easily and accurately without any restriction of scheduling operations. By installing this extraction mechanism, it is easy to introduce scheduling system without a lot of expense for customization. In this paper, at first a model for expressing a scheduling problem is proposed. Then the guideline to extract the scheduling information and use the extracted information is shown and some applied functions are also proposed based on it.

  20. Empirical results on scheduling and dynamic backtracking

    Science.gov (United States)

    Boddy, Mark S.; Goldman, Robert P.

    1994-01-01

    At the Honeywell Technology Center (HTC), we have been working on a scheduling problem related to commercial avionics. This application is large, complex, and hard to solve. To be a little more concrete: 'large' means almost 20,000 activities, 'complex' means several activity types, periodic behavior, and assorted types of temporal constraints, and 'hard to solve' means that we have been unable to eliminate backtracking through the use of search heuristics. At this point, we can generate solutions, where solutions exist, or report failure and sometimes why the system failed. To the best of our knowledge, this is among the largest and most complex scheduling problems to have been solved as a constraint satisfaction problem, at least that has appeared in the published literature. This abstract is a preliminary report on what we have done and how. In the next section, we present our approach to treating scheduling as a constraint satisfaction problem. The following sections present the application in more detail and describe how we solve scheduling problems in the application domain. The implemented system makes use of Ginsberg's Dynamic Backtracking algorithm, with some minor extensions to improve its utility for scheduling. We describe those extensions and the performance of the resulting system. The paper concludes with some general remarks, open questions and plans for future work.

  1. Optimal Grid Scheduling Using Improved Artificial Bee Colony Algorithm

    OpenAIRE

    T. Vigneswari; M. A. Maluk Mohamed

    2015-01-01

    Job Scheduling plays an important role for efficient utilization of grid resources available across different domains and geographical zones. Scheduling of jobs is challenging and NPcomplete. Evolutionary / Swarm Intelligence algorithms have been extensively used to address the NP problem in grid scheduling. Artificial Bee Colony (ABC) has been proposed for optimization problems based on foraging behaviour of bees. This work proposes a modified ABC algorithm, Cluster Hete...

  2. CMS Multicore Scheduling Strategy

    CERN Document Server

    Perez-Calero Yzquierdo, Antonio

    2014-01-01

    In the next years, processor architectures based on much larger numbers of cores will be most likely the model to continue Moores Law style throughput gains. This not only results in many more jobs in parallel running the LHC Run 1 era monolithic applications. Also the memory requirements of these processes push the workernode architectures to the limit. One solution is parallelizing the application itself, through forking and memory sharing or through threaded frameworks. CMS is following all of these approaches and has a comprehensive strategy to schedule multi-core jobs on the GRID based on the glideIn WMS submission infrastructure. We will present the individual components of the strategy, from special site specific queues used during provisioning of resources and implications to scheduling; to dynamic partitioning within a single pilot to allow to transition to multi-core or whole-node scheduling on site level without disallowing single-core jobs. In this presentation, we will present the experiences mad...

  3. Developing algorithm for the critical care physician scheduling

    Science.gov (United States)

    Lee, Hyojun; Pah, Adam; Amaral, Luis; Northwestern Memorial Hospital Collaboration

    Understanding the social network has enabled us to quantitatively study social phenomena such as behaviors in adoption and propagation of information. However, most work has been focusing on networks of large heterogeneous communities, and little attention has been paid to how work-relevant information spreads within networks of small and homogeneous groups of highly trained individuals, such as physicians. Within the professionals, the behavior patterns and the transmission of information relevant to the job are dependent not only on the social network between the employees but also on the schedules and teams that work together. In order to systematically investigate the dependence of the spread of ideas and adoption of innovations on a work-environment network, we sought to construct a model for the interaction network of critical care physicians at Northwestern Memorial Hospital (NMH) based on their work schedules. We inferred patterns and hidden rules from past work schedules such as turnover rates. Using the characteristics of the work schedules of the physicians and their turnover rates, we were able to create multi-year synthetic work schedules for a generic intensive care unit. The algorithm for creating shift schedules can be applied to other schedule dependent networks ARO1.

  4. The JFACC Planner/Scheduler

    National Research Council Canada - National Science Library

    2002-01-01

    ... (the JFACC Planner/Scheduler, or JPS) that supports generation of tightly linked air operations plans and schedules, as well as their adaptation in response to changing tasks and resource availability...

  5. HEURISTIC SCHEDULING IN A NIGERIA FURNITURE SHOP

    African Journals Online (AJOL)

    NIJOTECH

    heuristic scheduling Job Shop situations. The furniture shop ... The job flow diagram is schematically presented in figure. 1. Not every order needs processing in all work centres. If a Job does not require shaping then the processing time of .... Anude. 31. Figure 3: Variation of MINF with decreasing shop load for the four rules ...

  6. Scheduling support for transactional memory contention management

    DEFF Research Database (Denmark)

    Maldonado, Walther; Marler, Patrick; Felber, Pascal

    2010-01-01

    different strategies for efficient communication between the kernel and the user-level TM library. To the best of our knowledge, our work is the first to investigate kernel-level support for TM contention management. We have introduced kernel-level TM scheduling support into both the Linux and Solaris...

  7. Sleep inertia during a simulated 6-h on/6-h off fixed split duty schedule.

    Science.gov (United States)

    Hilditch, Cassie J; Short, Michelle; Van Dongen, Hans P A; Centofanti, Stephanie A; Dorrian, Jillian; Kohler, Mark; Banks, Siobhan

    Sleep inertia is a safety concern for shift workers returning to work soon after waking up. Split duty schedules offer an alternative to longer shift periods, but introduce additional wake-ups and may therefore increase risk of sleep inertia. This study investigated sleep inertia across a split duty schedule. Sixteen participants (age range 21-36 years; 10 females) participated in a 9-day laboratory study with two baseline nights (10 h time in bed, [TIB]), four 24-h periods of a 6-h on/6-h off split duty schedule (5-h TIB in off period; 10-h TIB per 24 h) and two recovery nights. Two complementary rosters were evaluated, with the timing of sleep and wake alternating between the two rosters (2 am/2 pm wake-up roster versus 8 am/8 pm wake-up roster). At 2, 17, 32 and 47 min after scheduled awakening, participants completed an 8-min inertia test bout, which included a 3-min psychomotor vigilance test (PVT-B), a 3-min Digit-Symbol Substitution Task (DSST), the Karolinska Sleepiness Scale (KSS), and the Samn-Perelli Fatigue Scale (SP-Fatigue). Further testing occurred every 2 h during scheduled wakefulness. Performance was consistently degraded and subjective sleepiness/fatigue was consistently increased during the inertia testing period as compared to other testing times. Morning wake-ups (2 am and 8 am) were associated with higher levels of sleep inertia than later wake-ups (2 pm and 8 pm). These results suggest that split duty workers should recognise the potential for sleep inertia after waking, especially during the morning hours.

  8. Schedule optimization study implementation plan

    International Nuclear Information System (INIS)

    1993-11-01

    This Implementation Plan is intended to provide a basis for improvements in the conduct of the Environmental Restoration (ER) Program at Hanford. The Plan is based on the findings of the Schedule Optimization Study (SOS) team which was convened for two weeks in September 1992 at the request of the U.S. Department of Energy (DOE) Richland Operations Office (RL). The need for the study arose out of a schedule dispute regarding the submission of the 1100-EM-1 Operable Unit (OU) Remedial Investigation/Feasibility Study (RI/FS) Work Plan. The SOS team was comprised of independent professionals from other federal agencies and the private sector experienced in environmental restoration within the federal system. The objective of the team was to examine reasons for the lengthy RI/FS process and recommend ways to expedite it. The SOS team issued their Final Report in December 1992. The report found the most serious impediments to cleanup relate to a series of management and policy issues which are within the control of the three parties managing and monitoring Hanford -- the DOE, U.S. Environmental Protection Agency (EPA), and the State of Washington Department of Ecology (Ecology). The SOS Report identified the following eight cross-cutting issues as the root of major impediments to the Hanford Site cleanup. Each of these eight issues is quoted from the SOS Report followed by a brief, general description of the proposed approach being developed

  9. Schedule optimization study implementation plan

    Energy Technology Data Exchange (ETDEWEB)

    1993-11-01

    This Implementation Plan is intended to provide a basis for improvements in the conduct of the Environmental Restoration (ER) Program at Hanford. The Plan is based on the findings of the Schedule Optimization Study (SOS) team which was convened for two weeks in September 1992 at the request of the U.S. Department of Energy (DOE) Richland Operations Office (RL). The need for the study arose out of a schedule dispute regarding the submission of the 1100-EM-1 Operable Unit (OU) Remedial Investigation/Feasibility Study (RI/FS) Work Plan. The SOS team was comprised of independent professionals from other federal agencies and the private sector experienced in environmental restoration within the federal system. The objective of the team was to examine reasons for the lengthy RI/FS process and recommend ways to expedite it. The SOS team issued their Final Report in December 1992. The report found the most serious impediments to cleanup relate to a series of management and policy issues which are within the control of the three parties managing and monitoring Hanford -- the DOE, U.S. Environmental Protection Agency (EPA), and the State of Washington Department of Ecology (Ecology). The SOS Report identified the following eight cross-cutting issues as the root of major impediments to the Hanford Site cleanup. Each of these eight issues is quoted from the SOS Report followed by a brief, general description of the proposed approach being developed.

  10. Block Scheduling in High Schools.

    Science.gov (United States)

    Irmsher, Karen

    1996-01-01

    Block Scheduling has been considered a cure for a lengthy list of educational problems. This report reviews the literature on block schedules and describes some Oregon high schools that have integrated block scheduling. Major disadvantages included resistance to change and requirements that teachers change their teaching strategies. There is…

  11. Job Scheduling with Efficient Resource Monitoring in Cloud Datacenter.

    Science.gov (United States)

    Loganathan, Shyamala; Mukherjee, Saswati

    2015-01-01

    Cloud computing is an on-demand computing model, which uses virtualization technology to provide cloud resources to users in the form of virtual machines through internet. Being an adaptable technology, cloud computing is an excellent alternative for organizations for forming their own private cloud. Since the resources are limited in these private clouds maximizing the utilization of resources and giving the guaranteed service for the user are the ultimate goal. For that, efficient scheduling is needed. This research reports on an efficient data structure for resource management and resource scheduling technique in a private cloud environment and discusses a cloud model. The proposed scheduling algorithm considers the types of jobs and the resource availability in its scheduling decision. Finally, we conducted simulations using CloudSim and compared our algorithm with other existing methods, like V-MCT and priority scheduling algorithms.

  12. Job Scheduling with Efficient Resource Monitoring in Cloud Datacenter

    Directory of Open Access Journals (Sweden)

    Shyamala Loganathan

    2015-01-01

    Full Text Available Cloud computing is an on-demand computing model, which uses virtualization technology to provide cloud resources to users in the form of virtual machines through internet. Being an adaptable technology, cloud computing is an excellent alternative for organizations for forming their own private cloud. Since the resources are limited in these private clouds maximizing the utilization of resources and giving the guaranteed service for the user are the ultimate goal. For that, efficient scheduling is needed. This research reports on an efficient data structure for resource management and resource scheduling technique in a private cloud environment and discusses a cloud model. The proposed scheduling algorithm considers the types of jobs and the resource availability in its scheduling decision. Finally, we conducted simulations using CloudSim and compared our algorithm with other existing methods, like V-MCT and priority scheduling algorithms.

  13. Long-term home care scheduling

    DEFF Research Database (Denmark)

    Gamst, Mette; Jensen, Thomas Sejr

    In several countries, home care is provided for certain citizens living at home. The long-term home care scheduling problem is to generate work plans spanning several days such that a high quality of service is maintained and the overall cost is kept as low as possible. A solution to the problem...... provides detailed information on visits and visit times for each employee on each of the covered days. We propose a branch-and-price algorithm for the long-term home care scheduling problem. The pricing problem generates one-day plans for an employee, and the master problem merges the plans with respect...

  14. Optimal investment and scheduling of distributed energy resources with uncertainty in electric vehicles driving schedules

    Energy Technology Data Exchange (ETDEWEB)

    Cardoso, Goncalo [Technical Univ. of Lisbon (Portugal); Stadler, Michael [Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Center for Energy and Innovation Technologies (Austria); Bozchalui, Mohammed C. [NEC Laboratories American Inc., Irving, TX (United States); Sharma, Ratnesh [NEC Laboratories American Inc., Irving, TX (United States); Marnay, Chris [Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Barbosa-Povoa, Ana [Technical Univ. of Lisbon (Portugal); Ferrao, Paulo [Technical Univ. of Lisbon (Portugal)

    2013-12-06

    The large scale penetration of electric vehicles (EVs) will introduce technical challenges to the distribution grid, but also carries the potential for vehicle-to-grid services. Namely, if available in large enough numbers, EVs can be used as a distributed energy resource (DER) and their presence can influence optimal DER investment and scheduling decisions in microgrids. In this work, a novel EV fleet aggregator model is introduced in a stochastic formulation of DER-CAM [1], an optimization tool used to address DER investment and scheduling problems. This is used to assess the impact of EV interconnections on optimal DER solutions considering uncertainty in EV driving schedules. Optimization results indicate that EVs can have a significant impact on DER investments, particularly if considering short payback periods. Furthermore, results suggest that uncertainty in driving schedules carries little significance to total energy costs, which is corroborated by results obtained using the stochastic formulation of the problem.

  15. Scheduling with Automatic Resolution of Conflicts

    Science.gov (United States)

    Clement, Bradley; Schaffer, Steve

    2006-01-01

    DSN Requirement Scheduler is a computer program that automatically schedules, reschedules, and resolves conflicts for allocations of resources of NASA s Deep Space Network (DSN) on the basis of ever-changing project requirements for DSN services. As used here, resources signifies, primarily, DSN antennas, ancillary equipment, and times during which they are available. Examples of project-required DSN services include arraying, segmentation, very-long-baseline interferometry, and multiple spacecraft per aperture. Requirements can include periodic reservations of specific or optional resources during specific time intervals or within ranges specified in terms of starting times and durations. This program is built on the Automated Scheduling and Planning Environment (ASPEN) software system (aspects of which have been described in previous NASA Tech Briefs articles), with customization to reflect requirements and constraints involved in allocation of DSN resources. Unlike prior DSN-resource- scheduling programs that make single passes through the requirements and require human intervention to resolve conflicts, this program makes repeated passes in a continuing search for all possible allocations, provides a best-effort solution at any time, and presents alternative solutions among which users can choose.

  16. Schedulability of Herschel revisited using statistical model checking

    DEFF Research Database (Denmark)

    David, Alexandre; Larsen, Kim Guldstrand; Legay, Axel

    2015-01-01

    to obtain some guarantee on the (un)schedulability of the model even in the presence of undecidability. Two methods are considered: symbolic model checking and statistical model checking. Since the model uses stop-watches, the reachability problem becomes undecidable so we are using an over......-approximation technique. We can safely conclude that the system is schedulable for varying values of BCET. For the cases where deadlines are violated, we use polyhedra to try to confirm the witnesses. Our alternative method to confirm non-schedulability uses statistical model-checking (SMC) to generate counter...

  17. NRC comprehensive records disposition schedule

    International Nuclear Information System (INIS)

    1982-07-01

    Effective January 1, 1982, NRC will institute records retention and disposal practices in accordance with the approved Comprehensive Records Disposition Schedule (CRDS). CRDS is comprised of NRC Schedules (NRCS) 1 to 4 which apply to the agency's program or substantive records and General Records Schedules (GRS) 1 to 22 which apply to housekeeping or facilitative records. The schedules are assembled functionally/organizationally to facilitate their use. Preceding the records descriptions and disposition instructions for both NRCS and GRS, there are brief statements on the organizational units which accumulate the records in each functional area, and other information regarding the schedules' applicability

  18. 75 FR 8751 - Records Schedules; Availability and Request for Comments

    Science.gov (United States)

    2010-02-25

    ... major subdivisions. Most schedules, however, cover records of only one office or program or a few series..., Administration on Aging (N1-439-09-2, 14 items, 14 temporary items). Schedules of daily activities and files of... and financial management files; grant award files, program support files and working files; and...

  19. 48 CFR 915.404-4-71-5 - Fee schedules.

    Science.gov (United States)

    2010-10-01

    ... METHODS AND CONTRACT TYPES CONTRACTING BY NEGOTIATION Contract Pricing 915.404-4-71-5 Fee schedules. (a... subcontracting, normal contractor services performed by the government or another contractor: (1) The target fee...) The target fee schedule provides for 45 percent of the contract work to be subcontracted for such...

  20. TECHNICAL COORDINATION, SCHEDULE AND INTEGRATION

    CERN Multimedia

    A. Ball

    Introduction Despite the holiday season affecting available manpower, many key internal milestones have been passed over the summer, thanks to the dedication and commitment of the team at point 5. In particular, the installation on, and within, YB0 has progressed steadily through several potentially difficult phases. The v36 planning contingency of lowering YB-1 and YB-1 wheels on schedule in October, before Tracker installation, will be executed in order to give more time to complete YB0 services work, whilst still being consistent with completion of heavy lowering by the end of 2007. Safety In the underground areas the peak level of activity and parallel work has been reached and this will continue for the coming months. Utmost vigilance is required of everybody working underground and this must be maintained. However, it is encouraging to note that the compliance with safety rules is, in general, good. More and more work will be carried out from scaffolding and mobile access platforms. (cherry-picke...

  1. Integrated network design and scheduling problems :

    Energy Technology Data Exchange (ETDEWEB)

    Nurre, Sarah G.; Carlson, Jeffrey J.

    2014-01-01

    We consider the class of integrated network design and scheduling problems. These problems focus on selecting and scheduling operations that will change the characteristics of a network, while being speci cally concerned with the performance of the network over time. Motivating applications of INDS problems include infrastructure restoration after extreme events and building humanitarian distribution supply chains. While similar models have been proposed, no one has performed an extensive review of INDS problems from their complexity, network and scheduling characteristics, information, and solution methods. We examine INDS problems under a parallel identical machine scheduling environment where the performance of the network is evaluated by solving classic network optimization problems. We classify that all considered INDS problems as NP-Hard and propose a novel heuristic dispatching rule algorithm that selects and schedules sets of arcs based on their interactions in the network. We present computational analysis based on realistic data sets representing the infrastructures of coastal New Hanover County, North Carolina, lower Manhattan, New York, and a realistic arti cial community CLARC County. These tests demonstrate the importance of a dispatching rule to arrive at near-optimal solutions during real-time decision making activities. We extend INDS problems to incorporate release dates which represent the earliest an operation can be performed and exible release dates through the introduction of specialized machine(s) that can perform work to move the release date earlier in time. An online optimization setting is explored where the release date of a component is not known.

  2. Realistic Scheduling Mechanism for Smart Homes

    Directory of Open Access Journals (Sweden)

    Danish Mahmood

    2016-03-01

    Full Text Available In this work, we propose a Realistic Scheduling Mechanism (RSM to reduce user frustration and enhance appliance utility by classifying appliances with respective constraints and their time of use effectively. Algorithms are proposed regarding functioning of home appliances. A 24 hour time slot is divided into four logical sub-time slots, each composed of 360 min or 6 h. In these sub-time slots, only desired appliances (with respect to appliance classification are scheduled to raise appliance utility, restricting power consumption by a dynamically modelled power usage limiter that does not only take the electricity consumer into account but also the electricity supplier. Once appliance, time and power usage limiter modelling is done, we use a nature-inspired heuristic algorithm, Binary Particle Swarm Optimization (BPSO, optimally to form schedules with given constraints representing each sub-time slot. These schedules tend to achieve an equilibrium amongst appliance utility and cost effectiveness. For validation of the proposed RSM, we provide a comparative analysis amongst unscheduled electrical load usage, scheduled directly by BPSO and RSM, reflecting user comfort, which is based upon cost effectiveness and appliance utility.

  3. A reduced feedback proportional fair multiuser scheduling scheme

    KAUST Repository

    Shaqfeh, Mohammad

    2011-12-01

    Multiuser switched-diversity scheduling schemes were recently proposed in order to overcome the heavy feedback requirements of conventional opportunistic scheduling schemes by applying a threshold-based, distributed and ordered scheduling mechanism. A slight reduction in the prospected multiuser diversity gains is an acceptable trade-off for great savings in terms of required channel-state-information feedback messages. In this work, we propose a novel proportional fair multiuser switched-diversity scheduling scheme and we demonstrate that it can be optimized using a practical and distributed method to obtain the per-user feedback thresholds. We demonstrate by numerical examples that our reduced feedback proportional fair scheduler operates within 0.3 bits/sec/Hz from the achievable rates by the conventional full feedback proportional fair scheduler in Rayleigh fading conditions. © 2011 IEEE.

  4. Where do we stand with fuzzy project scheduling?

    CERN Document Server

    Bonnal, Pierre; Lacoste, Germain

    2004-01-01

    Fuzzy project scheduling has interested several researchers in the past two decades; about 20 articles have been written on this issue. Contrary to stochastic project-scheduling approaches that are used by many project schedulers, and even if the axiomatic associated to the theory of probabilities is not always compatible with decision-making situations, fuzzy project-scheduling approaches that are most suited to these situations have been kept in the academic sphere. This paper starts by recalling the differences one can observe between uncertainty and imprecision. Then most of the published research works that have been done in this field are summarized. Finally, a framework for addressing the resource-constrained fuzzy project- scheduling problem is proposed. This framework uses temporal linguistic descriptors, which might become very interesting features to the project-scheduling practitioners.

  5. Scheduling theory, algorithms, and systems

    CERN Document Server

    Pinedo, Michael L

    2016-01-01

    This new edition of the well-established text Scheduling: Theory, Algorithms, and Systems provides an up-to-date coverage of important theoretical models in the scheduling literature as well as important scheduling problems that appear in the real world. The accompanying website includes supplementary material in the form of slide-shows from industry as well as movies that show actual implementations of scheduling systems. The main structure of the book, as per previous editions, consists of three parts. The first part focuses on deterministic scheduling and the related combinatorial problems. The second part covers probabilistic scheduling models; in this part it is assumed that processing times and other problem data are random and not known in advance. The third part deals with scheduling in practice; it covers heuristics that are popular with practitioners and discusses system design and implementation issues. All three parts of this new edition have been revamped, streamlined, and extended. The reference...

  6. Seal design alternatives study

    International Nuclear Information System (INIS)

    Van Sambeek, L.L.; Luo, D.D.; Lin, M.S.; Ostrowski, W.; Oyenuga, D.

    1993-06-01

    This report presents the results from a study of various sealing alternatives for the WIPP sealing system. Overall, the sealing system has the purpose of reducing to the extent possible the potential for fluids (either gas or liquid) from entering or leaving the repository. The sealing system is divided into three subsystems: drift and panel seals within the repository horizon, shaft seals in each of the four shafts, and borehole seals. Alternatives to the baseline configuration for the WIPP seal system design included evaluating different geometries and schedules for seal component installations and the use of different materials for seal components. Order-of-magnitude costs for the various alternatives were prepared as part of the study. Firm recommendations are not presented, but the advantages and disadvantages of the alternatives are discussed. Technical information deficiencies are identified and studies are outlined which can provide required information

  7. Issues in NASA Program and Project Management: Focus on Project Planning and Scheduling

    Science.gov (United States)

    Hoffman, Edward J. (Editor); Lawbaugh, William M. (Editor)

    1997-01-01

    Topics addressed include: Planning and scheduling training for working project teams at NASA, overview of project planning and scheduling workshops, project planning at NASA, new approaches to systems engineering, software reliability assessment, and software reuse in wind tunnel control systems.

  8. Neural network computing model for highway construction project scheduling and management : final report, October 1999.

    Science.gov (United States)

    1999-10-01

    A general mathematical formulation has been developed for scheduling of construction projects and applied to the problem of highway construction scheduling. Repetitive and non-repetitive tasks, work continuity considerations, multiple-crew strategies...

  9. Distributed project scheduling at NASA: Requirements for manual protocols and computer-based support

    Science.gov (United States)

    Richards, Stephen F.

    1992-01-01

    The increasing complexity of space operations and the inclusion of interorganizational and international groups in the planning and control of space missions lead to requirements for greater communication, coordination, and cooperation among mission schedulers. These schedulers must jointly allocate scarce shared resources among the various operational and mission oriented activities while adhering to all constraints. This scheduling environment is complicated by such factors as the presence of varying perspectives and conflicting objectives among the schedulers, the need for different schedulers to work in parallel, and limited communication among schedulers. Smooth interaction among schedulers requires the use of protocols that govern such issues as resource sharing, authority to update the schedule, and communication of updates. This paper addresses the development and characteristics of such protocols and their use in a distributed scheduling environment that incorporates computer-aided scheduling tools. An example problem is drawn from the domain of Space Shuttle mission planning.

  10. Work Plan Based on the Implementation of the Technical Square Foot Gardening as an Alternative to the Use of Solid Waste Organics

    Directory of Open Access Journals (Sweden)

    Sandra Yolimar Delgado Briceño

    2017-02-01

    Full Text Available This research aims to promote a work plan based on the implementation of the technique of Square Foot Gardening as an alternative to the use of organic solid waste in the community of Barrio El Paraiso del Sector San Rafael de la Barinitas Parish Bolivar County Barinas State during the period 2014-2015. The study was part of the qualitative paradigm under the method of participatory action research. The technique used for collecting information was participant observation and interview, using an audiovisual record face to face and as an instrument interview guide, with a design of field research. Key informants make up the three residents of the community. The authenticity and viability of the instrument was applied through triangulation, in regard to technical information analysis table of categories with which comparisons and contrasts were made possible was developed. With the promotion of this plan it is to permanently reduce the accumulation of organic solid waste, improve the quality of life of the inhabitants of the aforementioned sectors, conserving and preserving the environment around them.

  11. Alternative security

    International Nuclear Information System (INIS)

    Weston, B.H.

    1990-01-01

    This book contains the following chapters: The Military and Alternative Security: New Missions for Stable Conventional Security; Technology and Alternative Security: A Cherished Myth Expires; Law and Alternative Security: Toward a Just World Peace; Politics and Alternative Security: Toward a More Democratic, Therefore More Peaceful, World; Economics and Alternative Security: Toward a Peacekeeping International Economy; Psychology and Alternative Security: Needs, Perceptions, and Misperceptions; Religion and Alternative Security: A Prophetic Vision; and Toward Post-Nuclear Global Security: An Overview

  12. Preliminary ITER cost and schedule estimates

    International Nuclear Information System (INIS)

    1990-01-01

    The cost, manpower requirements, and schedule estimates for the realization of the ITER tokamak have been studied during the Conceptual Design Activities, as a result of work by the ITER Management Committee. This work was completed during the January-March, 1990 joint work session, and is presented in this report. A possible schedule shows completion of the engineering design phase in 1995, with 180 professionals, at a cost of about $250M. The construction would be completed in 2004 with a rise in professional staff to 300, and a total cost of $4900M. The machine would be operable over an 18-year period, at an annual operating cost averaging $290M. 2 figs

  13. Contribution of Schedule Delays to Cost Growth: How to Make Peace with a Marching Army

    Science.gov (United States)

    Majerowicz, Walt; Bitten, Robert; Emmons, Debra; Shinn, Stephen A.

    2016-01-01

    Numerous research papers have shown that cost and schedule growth are interrelated for NASA space science missions. Although there has shown to be a strong correlation of cost growth with schedule growth, it is unclear what percentage of cost growth is caused by schedule growth and how schedule growth can be controlled. This paper attempts to quantify this percentage by looking at historical data and show detailed examples of how schedule growth influences cost growth. The paper also addresses a methodology to show an alternate approach for assessing and setting a robust baseline schedule and use schedule performance metrics to help assess if the project is performing to plan. Finally, recommendations are presented to help control schedule growth in order to minimize cost growth for NASA space science missions.

  14. Rostering and Task Scheduling

    DEFF Research Database (Denmark)

    Dohn, Anders Høeg

    to scheduling problems with temporal dependencies between tasks. However, these problems appear in various contexts and with different properties. A group of the problems considered are related to vehicle routing problems, where transportation and time windows are important factors that must be accounted for....... Mathematical and logic-based models are presented for the problems considered. Novel components are added to existing models and the modeling decisions are justified. In one case, the model is solved by a simple, but efficient greedy construction heuristic. In the remaining cases, column generation is applied....... Column generation is an iterative exact solution method based on the theory of linear programming and is capable of providing provably optimal solutions. In some of the applications, the approach is modified to provide feasible solutions of high-quality in less time. The exceptional solution quality...

  15. Le Nordais on schedule

    International Nuclear Information System (INIS)

    Anon.

    1998-01-01

    The first phase of the Le Nordais wind farm project in the Gaspe Peninsula in Quebec is on schedule. It was announced that the project's first turbines will be turning by September 1998. Hydro-Quebec has agreed to buy power from the 100 MW wind farm. The Le Nordais consortium plans to have 76,750 kW turbines in service in Cap-Chat by December 1998. Many of the foundations for the towers are poured and a substation is under construction. The turbines that are currently in use come from Denmark, but 20 of the 76 turbines being slated for installation this year will come from NEG Micon Canada Inc.'s assembly plant in Quebec. The Quebec government is providing a $5.6 million grant for their production and for turbine assembly in Quebec. During phase two, an additional 57 turbines will be installed in Matane by the end of 1999. 1 fig

  16. S-CHART - SCHEDULING CHART PROGRAM

    Science.gov (United States)

    Klinkner, E. R.

    1994-01-01

    The Scheduling Chart Program (S-Chart) uses simple menu choices to produce high quality Gantt type scheduling and production time-line charts with minimal data entry requirements. The software produces high quality charts (20, 40, and 80 day options) in 10-20 minutes including start up, data entry, and printing. Reprints take less than one minute. Some of the more significant features are as follows: speed and ease of use with menu driven selections from start to finish, storage and catalogs of all data sets for rapid access and manipulation, compact program size to permit storage of dozens of data sets on the program disc, and creation of ASCII text files of graphs for rapid printing. The final product of the plot routine is an extended ASCII character file which shows the events scheduled and actual work dates. This file may be printed from the program, from DOS, or imported to a word processor for customizing. S-Chart is not intended to take the place of commercial scheduling/project management software. However, it is a simple, somewhat limited Gantt chart plotter and scheduling tracking program with an emphasis on straightforward data entry. There is no complex relationship building between the scheduled events. Dates are entered as dates, not as algebraic functions. All the files of S-Chart, except for the graph picture and the stand-alone executable, were written in 100% dBASE III compatible code. The executable code was created with CLIPPER and the graph picture files are written in ASCII code. S-Chart was implemented on an IBM PC series machine under DOS and requires 215k bytes of memory. The program was developed in 1988.

  17. NRC comprehensive records disposition schedule

    International Nuclear Information System (INIS)

    1992-03-01

    Title 44 United States Code, ''Public Printing and Documents,'' regulations cited in the General Services Administration's (GSA) ''Federal Information Resources Management Regulations'' (FIRMR), Part 201-9, ''Creation, Maintenance, and Use of Records,'' and regulation issued by the National Archives and Records Administration (NARA) in 36 CFR Chapter XII, Subchapter B, ''Records Management,'' require each agency to prepare and issue a comprehensive records disposition schedule that contains the NARA approved records disposition schedules for records unique to the agency and contains the NARA's General Records Schedules for records common to several or all agencies. The approved records disposition schedules specify the appropriate duration of retention and the final disposition for records created or maintained by the NRC. NUREG-0910, Rev. 2, contains ''NRC's Comprehensive Records Disposition Schedule,'' and the original authorized approved citation numbers issued by NARA. Rev. 2 totally reorganizes the records schedules from a functional arrangement to an arrangement by the host office. A subject index and a conversion table have also been developed for the NRC schedules to allow staff to identify the new schedule numbers easily and to improve their ability to locate applicable schedules

  18. Does self-scheduling increase nurses' job satisfaction? An integrative literature review.

    Science.gov (United States)

    Koning, Clare

    2014-09-25

    Flexible work schedules give nurses the freedom and control to manage the demands of work and home, allow organisations to meet their staffing needs and can improve job satisfaction. This article reports the results of an integrative review of published peer-reviewed research and personal narratives that examined nurses' perceptions of the relationship between job satisfaction and a self-scheduling system. Results suggest that self-scheduling is one of a number of factors that influence job satisfaction, but that implementing and sustaining such a system can be challenging. The review also found that self-scheduling programmes underpin more flexible work schedules and can benefit nurses and their organisations.

  19. On program restructuring, scheduling, and communication for parallel processor systems

    Energy Technology Data Exchange (ETDEWEB)

    Polychronopoulos, Constantine D. [Univ. of Illinois, Urbana, IL (United States)

    1986-08-01

    This dissertation discusses several software and hardware aspects of program execution on large-scale, high-performance parallel processor systems. The issues covered are program restructuring, partitioning, scheduling and interprocessor communication, synchronization, and hardware design issues of specialized units. All this work was performed focusing on a single goal: to maximize program speedup, or equivalently, to minimize parallel execution time. Parafrase, a Fortran restructuring compiler was used to transform programs in a parallel form and conduct experiments. Two new program restructuring techniques are presented, loop coalescing and subscript blocking. Compile-time and run-time scheduling schemes are covered extensively. Depending on the program construct, these algorithms generate optimal or near-optimal schedules. For the case of arbitrarily nested hybrid loops, two optimal scheduling algorithms for dynamic and static scheduling are presented. Simulation results are given for a new dynamic scheduling algorithm. The performance of this algorithm is compared to that of self-scheduling. Techniques for program partitioning and minimization of interprocessor communication for idealized program models and for real Fortran programs are also discussed. The close relationship between scheduling, interprocessor communication, and synchronization becomes apparent at several points in this work. Finally, the impact of various types of overhead on program speedup and experimental results are presented.

  20. Evaluation and Selection of Best Priority Sequencing Rule in Job Shop Scheduling using Hybrid MCDM Technique

    Science.gov (United States)

    Kiran Kumar, Kalla; Nagaraju, Dega; Gayathri, S.; Narayanan, S.

    2017-05-01

    Priority Sequencing Rules provide the guidance for the order in which the jobs are to be processed at a workstation. The application of different priority rules in job shop scheduling gives different order of scheduling. More experimentation needs to be conducted before a final choice is made to know the best priority sequencing rule. Hence, a comprehensive method of selecting the right choice is essential in managerial decision making perspective. This paper considers seven different priority sequencing rules in job shop scheduling. For evaluation and selection of the best priority sequencing rule, a set of eight criteria are considered. The aim of this work is to demonstrate the methodology of evaluating and selecting the best priority sequencing rule by using hybrid multi criteria decision making technique (MCDM), i.e., analytical hierarchy process (AHP) with technique for order preference by similarity to ideal solution (TOPSIS). The criteria weights are calculated by using AHP whereas the relative closeness values of all priority sequencing rules are computed based on TOPSIS with the help of data acquired from the shop floor of a manufacturing firm. Finally, from the findings of this work, the priority sequencing rules are ranked from most important to least important. The comprehensive methodology presented in this paper is very much essential for the management of a workstation to choose the best priority sequencing rule among the available alternatives for processing the jobs with maximum benefit.

  1. Withdrawing from Iraq: Alternative Schedules, Associated Risks, and Mitigating Strategies

    Science.gov (United States)

    2009-01-01

    Powers, Office of Provincial Affairs Director Mr. Mike Dodman, Economic Counselor Mr. Michael Corbin , Political-Military Counselor Maj Gen (Ret.) William...Shiites Answer Sistani Call to Protest Bombing,” Khaleej Times (Dubai), February 23, 2006. Barkey, Henri J., “Kurdistandoff,” The National Interest, July...Logistics ROC Drill (Phase 1),” briefing, May 7, 2008. Henry , Ryan, “Memo on Op Plans,” undated. Hess, Pamela, “US: Quds, Hezbollah Training Militia in Iran

  2. Schedules of Controlled Substances: Temporary Placement of 4-Fluoroisobutyryl Fentanyl into Schedule I. Temporary scheduling order.

    Science.gov (United States)

    2017-05-03

    The Administrator of the Drug Enforcement Administration is issuing this temporary scheduling order to schedule the synthetic opioid, N-(4-fluorophenyl)-N-(1-phenethylpiperidin-4-yl)isobutyramide (4-fluoroisobutyryl fentanyl or para-fluoroisobutyryl fentanyl), and its isomers, esters, ethers, salts and salts of isomers, esters, and ethers, into schedule I pursuant to the temporary scheduling provisions of the Controlled Substances Act. This action is based on a finding by the Administrator that the placement of 4-fluoroisobutyryl fentanyl into schedule I of the Controlled Substances Act is necessary to avoid an imminent hazard to the public safety. As a result of this order, the regulatory controls and administrative, civil, and criminal sanctions applicable to schedule I controlled substances will be imposed on persons who handle (manufacture, distribute, reverse distribute, import, export, engage in research, conduct instructional activities or chemical analysis, or possess), or propose to handle, 4-fluoroisobutyryl fentanyl.

  3. Alternative additives; Alternative additiver

    Energy Technology Data Exchange (ETDEWEB)

    2007-08-15

    In this project a number of industrial and agricultural waste products have been characterised and evaluated in terms of alkali-getter performance. The intended use is for biomass-fired power stations aiming at reducing corrosion or slagging related problems. The following products have been obtained, characterised and evaluated: 1) Brewery draff 2) Danish de-gassed manure 3) Paper sludge 4) Moulding sand 5) Spent bleaching earth 6) Anorthosite 7) Sand 8) Clay-sludge. Most of the above alternative additive candidates are deemed unsuitable due to insufficient chemical effect and/or expensive requirements for pre-treatment (such as drying and transportation). 3 products were selected for full-scale testing: de-gassed manure, spent bleaching earth and clay slugde. The full scale tests were undertaken at the biomass-fired power stations in Koege, Slagelse and Ensted. Spent bleaching earth (SBE) and clay sludge were the only tested additive candidates that had a proven ability to react with KCl, to thereby reduce Cl-concentrations in deposits, and reduce the deposit flux to superheater tubes. Their performance was shown to nearly as good as commercial additives. De-gassed manure, however, did not evaluate positively due to inhibiting effects of Ca in the manure. Furthermore, de-gassed manure has a high concentration of heavy metals, which imposes a financial burden with regard to proper disposal of the ash by-products. Clay-sludge is a wet clay slurring, and drying and transportation of this product entails substantial costs. Spent bleaching does not require much pre-treatment and is therefore the most promising alternative additive. On the other hand, bleaching earth contains residual plant oil which means that a range of legislation relating to waste combustion comes into play. Not least a waste combustion fee of 330 DKK/tonne. For all alternative (and commercial) additives disposal costs of the increase ash by-products represents a significant cost. This is

  4. Designing of Vague Logic Based 2-Layered Framework for CPU Scheduler

    Directory of Open Access Journals (Sweden)

    Supriya Raheja

    2016-01-01

    Full Text Available Fuzzy based CPU scheduler has become of great interest by operating system because of its ability to handle imprecise information associated with task. This paper introduces an extension to the fuzzy based round robin scheduler to a Vague Logic Based Round Robin (VBRR scheduler. VBRR scheduler works on 2-layered framework. At the first layer, scheduler has a vague inference system which has the ability to handle the impreciseness of task using vague logic. At the second layer, Vague Logic Based Round Robin (VBRR scheduling algorithm works to schedule the tasks. VBRR scheduler has the learning capability based on which scheduler adapts intelligently an optimum length for time quantum. An optimum time quantum reduces the overhead on scheduler by reducing the unnecessary context switches which lead to improve the overall performance of system. The work is simulated using MATLAB and compared with the conventional round robin scheduler and the other two fuzzy based approaches to CPU scheduler. Given simulation analysis and results prove the effectiveness and efficiency of VBRR scheduler.

  5. Software Schedules Missions, Aids Project Management

    Science.gov (United States)

    2008-01-01

    NASA missions require advanced planning, scheduling, and management, and the Space Agency has worked extensively to develop the programs and software suites necessary to facilitate these complex missions. These enormously intricate undertakings have hundreds of active components that need constant management and monitoring. It is no surprise, then, that the software developed for these tasks is often applicable in other high-stress, complex environments, like in government or industrial settings. NASA work over the past few years has resulted in a handful of new scheduling, knowledge-management, and research tools developed under contract with one of NASA s partners. These tools have the unique responsibility of supporting NASA missions, but they are also finding uses outside of the Space Program.

  6. Les effets conjoints du travail et des horaires alternants sur la santé des agents de surveillance des établissements pénitentiaires The effects of work content and working hours on the health of prison guards Los efectos combinados del trabajo y de los horarios alternantes sobre la salud de los guardianes de cárceles en los establecimientos penitenciarios

    Directory of Open Access Journals (Sweden)

    Pierre Pavageau

    2006-10-01

    Full Text Available Les préoccupations en santé publique révèlent le peu Notre étude vise à comparer les effets sur la santé de trois formes d’organisation temporelle (horaires traditionnels, factions de 6 heures et de 12 heures au sein d’établissements pénitentiaires français, et plus particulièrement auprès des personnels de surveillance. Des moyens d’investigation complémentaires (questionnaire, observations du travail, traitement statistique ont été mis en œuvre pour tenter de faire la part entre le poids des horaires et le poids du travail sur l’état de santé des agents. Si les personnels en factions de 12 heures présentent des résultats meilleurs que les personnels en 6 heures, c’est en particulier dû à des avantages dans la vie extra-professionnelle, bien que des signes certains de fatigue ne permettent pas de conclure significativement en faveur de telles modalités. Au-delà de l’alternance des horaires, le contenu du travail pèse de manière importante sur la santé des agents.The aim of our study is to compare the effects of three different forms of time organization (traditional 9 to 5 schedule, 6-hour shifts, and 12-hour shifts inside French prisons, and particularly on prison guard staff. Complementary means of investigation (questionnaire, work observations, statistical treatment were used to attempt to evaluate the difference between the effect of working hours and of the actual work on the guards’ health. Staff who worked 12-hour shifts had more positive results than staff who worked 6-hour shifts. This was mainly due to the advantages in their private lives. At the same time, some signs of fatigue prevent us from conclusively favouring this type of working rhythm. Beyond the alternation of schedules, the actual work content also has an important impact on the workers’ health.Nuestro estudio pretende comparar los efectos sobre la salud de tres formas de organización temporal (horarios tradicionales, turnos de

  7. Combined Noncyclic Scheduling and Advanced Control for Continuous Chemical Processes

    Directory of Open Access Journals (Sweden)

    Damon Petersen

    2017-12-01

    Full Text Available A novel formulation for combined scheduling and control of multi-product, continuous chemical processes is introduced in which nonlinear model predictive control (NMPC and noncyclic continuous-time scheduling are efficiently combined. A decomposition into nonlinear programming (NLP dynamic optimization problems and mixed-integer linear programming (MILP problems, without iterative alternation, allows for computationally light solution. An iterative method is introduced to determine the number of production slots for a noncyclic schedule during a prediction horizon. A filter method is introduced to reduce the number of MILP problems required. The formulation’s closed-loop performance with both process disturbances and updated market conditions is demonstrated through multiple scenarios on a benchmark continuously stirred tank reactor (CSTR application with fluctuations in market demand and price for multiple products. Economic performance surpasses cyclic scheduling in all scenarios presented. Computational performance is sufficiently light to enable online operation in a dual-loop feedback structure.

  8. Project schedule and cost estimate report

    International Nuclear Information System (INIS)

    1988-03-01

    All cost tables represent obligation dollars, at both a constant FY 1987 level and an estimated escalation level, and are based on the FY 1989 DOE Congressional Budget submittal of December 1987. The cost tables display the total UMTRA Project estimated costs, which include both Federal and state funding. The Total Estimated Cost (TEC) for the UMTRA Project is approximately $992.5 million (in 1987 escalated dollars). Project schedules have been developed that provide for Project completion by September 1994, subject to Congressional approval extending DOE's authorization under Public Law 95-604. The report contains site-specific demographic data, conceptual design assumptions, preliminary cost estimates, and site schedules. A general project overview is also presented, which includes a discussion of the basis for the schedule and cost estimates, contingency assumptions, work breakdown structure, and potential project risks. The schedules and cost estimates will be revised as necessary to reflect appropriate decisions relating to relocation of certain tailings piles, or other special design considerations or circumstances (such as revised EPA groundwater standards), and changes in the Project mission. 27 figs', 97 tabs

  9. Advance Resource Provisioning in Bulk Data Scheduling

    Energy Technology Data Exchange (ETDEWEB)

    Balman, Mehmet

    2012-10-01

    Today?s scientific and business applications generate mas- sive data sets that need to be transferred to remote sites for sharing, processing, and long term storage. Because of increasing data volumes and enhancement in current net- work technology that provide on-demand high-speed data access between collaborating institutions, data handling and scheduling problems have reached a new scale. In this paper, we present a new data scheduling model with ad- vance resource provisioning, in which data movement operations are defined with earliest start and latest comple- tion times. We analyze time-dependent resource assign- ment problem, and propose a new methodology to improve the current systems by allowing researchers and higher-level meta-schedulers to use data-placement as-a-service, so they can plan ahead and submit transfer requests in advance. In general, scheduling with time and resource conflicts is NP-hard. We introduce an efficient algorithm to organize multiple requests on the fly, while satisfying users? time and resource constraints. We successfully tested our algorithm in a simple benchmark simulator that we have developed, and demonstrated its performance with initial test results.

  10. Scheduling in the operating theatre.

    OpenAIRE

    Rose, M. B.; Davies, D. C.

    1984-01-01

    The effect of scheduling on the use of operating theatre time has been studied. Scheduling involved determining the average length of common operations and fitting them into the calculated available operating time. The technique has been shown to reduce significantly the variation in length of operating sessions, and it ensures the best use of available operating time.

  11. TECHNICAL COORDINATION SCHEDULE & INTEGRATION

    CERN Multimedia

    W. Zeuner

    Introduction The endgame of CMS installation in the underground cavern is in full swing, with several major milestones having been passed since the last CMS week. The Tracker was installed inside the Vactank just before the CERN end-of-year shutdown. Shortly after the reopening in 2008, the two remaining endcap disks, YE-2 and YE-1, were lowered, marking the completion of eight years of assembly in the surface building SX5. The remaining tasks, before the detector can be closed for the Cosmic Run At Four Tesla (CRAFT), are the installation of the thermal shields, the cabling of the negative endcap, the cabling of the tracker and the beam pipe installation. In addition to these installation tasks, a test closure of the positive endcap is planned just before the installation of the central beam pipe. The schedule is tight and complicated but the goal to close CMS by the end of May for a cosmic test with magnetic field remains feasible. Safety With all large components now being underground, the shortage...

  12. Bulletin publication schedule

    CERN Multimedia

    Publications Section, DG-CO Group

    2011-01-01

    The final edition (Nos 51-52/2011 and 1-2-3/2012) of the Bulletin this year will be published on Friday 16 December and will cover events at CERN from 19 December 2011 to 19 January 2012. Announcements for publication in this issue should reach the Communication Group or the Staff Association, as appropriate, by noon on Tuesday 13 December. Bulletin publication schedule for 2012 The table below lists the 2012 publication dates for the paper version of the Bulletin and the corresponding deadlines for the submission of announcements. Please note that all announcements must be submitted by 12.00 noon on Tuesdays at the latest.   Bulletin No. Week number Submission of announcements (before 12.00 midday) Bulletin Web version Bulletin Printed version 4-5   Tuesday 17 January Fridays 20 and 27 January Wednesday25 January 6-7   Tuesday 31 January Fridays 3 and 10 February Wednesday 8 February 8-9 Tuesday 14 February Fridays 17 and 24 february Wednesday 22 Februa...

  13. Space station program phase B definition: Nuclear reactor-powered space station cost and schedules

    Science.gov (United States)

    1971-01-01

    Tabulated data are presented on the costs, schedules, and technical characteristics for the space station phases C and D program. The work breakdown structure, schedule data, program ground rules, program costs, cost-estimating rationale, funding schedules, and supporting data are included.

  14. Astronaut Office Scheduling System Software

    Science.gov (United States)

    Brown, Estevancio

    2010-01-01

    AOSS is a highly efficient scheduling application that uses various tools to schedule astronauts weekly appointment information. This program represents an integration of many technologies into a single application to facilitate schedule sharing and management. It is a Windows-based application developed in Visual Basic. Because the NASA standard office automation load environment is Microsoft-based, Visual Basic provides AO SS developers with the ability to interact with Windows collaboration components by accessing objects models from applications like Outlook and Excel. This also gives developers the ability to create newly customizable components that perform specialized tasks pertaining to scheduling reporting inside the application. With this capability, AOSS can perform various asynchronous tasks, such as gathering/ sending/ managing astronauts schedule information directly to their Outlook calendars at any time.

  15. Alternative crops

    International Nuclear Information System (INIS)

    Andreasen, L.M.; Boon, A.D.

    1992-01-01

    Surplus cereal production in the EEC and decreasing product prices, mainly for cereals, has prompted considerable interest for new earnings in arable farming. The objective was to examine whether suggested new crops (fibre, oil, medicinal and alternative grains crops) could be considered as real alternatives. Whether a specific crop can compete economically with cereals and whether there is a market demand for the crop is analyzed. The described possibilities will result in ca. 50,000 hectares of new crops. It is expected that they would not immediately provide increased earnings, but in the long run expected price developments are more positive than for cereals. The area for new crops will not solve the current surplus cereal problem as the area used for new crops is only 3% of that used for cereals. Preconditions for many new crops is further research activities and development work as well as the establishment of processing units and organizational initiatives. Presumably, it is stated, there will then be a basis for a profitable production of new crops for some farmers. (AB) (47 refs.)

  16. A Component Analysis of Schedule Thinning during Functional Communication Training

    Science.gov (United States)

    Betz, Alison M.; Fisher, Wayne W.; Roane, Henry S.; Mintz, Joslyn C.; Owen, Todd M.

    2013-01-01

    One limitation of functional communication training (FCT) is that individuals may request reinforcement via the functional communication response (FCR) at exceedingly high rates. Multiple schedules with alternating periods of reinforcement and extinction of the FCR combined with gradually lengthening the extinction-component interval can…

  17. A Structural Validation of the Schedule of Racist Events

    Science.gov (United States)

    Greer, Tawanda M.

    2010-01-01

    This study examined the structural validity of the Schedule of Racist Events (SRE), a brief inventory that assesses the frequency and stressfulness of racism in the lives of African Americans. The original three-factor structure of the SRE was examined, along with an alternative structure that was designed to test whether the SRE captured types of…

  18. Request-Driven Schedule Automation for the Deep Space Network

    Science.gov (United States)

    Johnston, Mark D.; Tran, Daniel; Arroyo, Belinda; Call, Jared; Mercado, Marisol

    2010-01-01

    The DSN Scheduling Engine (DSE) has been developed to increase the level of automated scheduling support available to users of NASA s Deep Space Network (DSN). We have adopted a request-driven approach to DSN scheduling, in contrast to the activity-oriented approach used up to now. Scheduling requests allow users to declaratively specify patterns and conditions on their DSN service allocations, including timing, resource requirements, gaps, overlaps, time linkages among services, repetition, priorities, and a wide range of additional factors and preferences. The DSE incorporates a model of the key constraints and preferences of the DSN scheduling domain, along with algorithms to expand scheduling requests into valid resource allocations, to resolve schedule conflicts, and to repair unsatisfied requests. We use time-bounded systematic search with constraint relaxation to return nearby solutions if exact ones cannot be found, where the relaxation options and order are under user control. To explore the usability aspects of our approach we have developed a graphical user interface incorporating some crucial features to make it easier to work with complex scheduling requests. Among these are: progressive revelation of relevant detail, immediate propagation and visual feedback from a user s decisions, and a meeting calendar metaphor for repeated patterns of requests. Even as a prototype, the DSE has been deployed and adopted as the initial step in building the operational DSN schedule, thus representing an important initial validation of our overall approach. The DSE is a core element of the DSN Service Scheduling Software (S(sup 3)), a web-based collaborative scheduling system now under development for deployment to all DSN users.

  19. Alternative drugs of abuse.

    Science.gov (United States)

    Sutter, M E; Chenoweth, J; Albertson, T E

    2014-02-01

    The incidence of drug abuse with alternative agents is increasing. The term "alternative drugs of abuse" is a catch-all term for abused chemicals that do not fit into one of the classic categories of drugs of abuse. The most common age group abusing these agents range from 17 to 25 years old and are often associated with group settings. Due to their diverse pharmacological nature, legislative efforts to classify these chemicals as a schedule I drug have lagged behind the development of new alternative agents. The potential reason for abuse of these agents is their hallucinogenic, dissociative, stimulant, anti-muscarinic, or sedative properties. Some of these drugs are easily obtainable such as Datura stramonium (Jimson Weed) or Lophophora williamsii (Peyote) because they are natural plants indigenous to certain regions. The diverse pharmacology and clinical effects of these agents are so broad that they do not produce a universal constellation of signs and symptoms. Detailed physical exams are essential for identifying clues leading one to suspect an alternative drug of abuse. Testing for the presence of these agents is often limited, and even when available, the results do not return in a timely fashion. Intoxications from these agents pose unique challenges for health care providers. Physician knowledge of the physiological effects of these alternative agents and the local patterns of drug of abuse are important for the accurate diagnosis and optimal care of poisoned patients. This review summarizes the current knowledge of alternative drugs of abuse and highlights their clinical presentations.

  20. A study of the impact of scheduling parameters in heterogeneous computing environments

    Energy Technology Data Exchange (ETDEWEB)

    Powers, Sarah S [ORNL

    2014-01-01

    This paper describes a tool for exploring system scheduler parameter settings in a heterogeneous computing environment. Through the coupling of simulation and optimization techniques, this work investigates optimal scheduling intervals, the impact of job arrival prediction on scheduling, as well as how to best apply fair use policies. The developed simulation framework is quick and modular, enabling decision makers to further explore decisions in real-time regarding scheduling policies or parameter changes.

  1. Optimal investment and scheduling of distributed energy resources with uncertainty in electric vehicle driving schedules

    International Nuclear Information System (INIS)

    Cardoso, G.; Stadler, M.; Bozchalui, M.C.; Sharma, R.; Marnay, C.; Barbosa-Póvoa, A.; Ferrão, P.

    2014-01-01

    The large scale penetration of electric vehicles (EVs) will introduce technical challenges to the distribution grid, but also carries the potential for vehicle-to-grid services. Namely, if available in large enough numbers, EVs can be used as a distributed energy resource (DER) and their presence can influence optimal DER investment and scheduling decisions in microgrids. In this work, a novel EV fleet aggregator model is introduced in a stochastic formulation of DER-CAM [1], an optimization tool used to address DER investment and scheduling problems. This is used to assess the impact of EV interconnections on optimal DER solutions considering uncertainty in EV driving schedules. Optimization results indicate that EVs can have a significant impact on DER investments, particularly if considering short payback periods. Furthermore, results suggest that uncertainty in driving schedules carries little significance to total energy costs, which is corroborated by results obtained using the stochastic formulation of the problem. - Highlights: • This paper introduces a new EV aggregator model in the DER-CAM model and expands it with a stochastic formulation. • The model is used to analyze the impact of EVs in DER investment decisions in a large office building. • The uncertainty in EV driving patterns is considered through scenarios based on data from a daily commute driving survey. • Results indicate that EVs have a significant impact in optimal DER decisions, particularly when looking at short payback periods. • Furthermore, results indicate that uncertainty in EV driving schedules has little impact on DER investment decisions

  2. Scheduling Broadcasts in a Network of Timelines

    KAUST Repository

    Manzoor, Emaad A.

    2015-05-12

    Broadcasts and timelines are the primary mechanism of information exchange in online social platforms today. Services like Facebook, Twitter and Instagram have enabled ordinary people to reach large audiences spanning cultures and countries, while their massive popularity has created increasingly competitive marketplaces of attention. Timing broadcasts to capture the attention of such geographically diverse audiences has sparked interest from many startups and social marketing gurus. However, formal study is lacking on both the timing and frequency problems. In this thesis, we introduce, motivate and solve the broadcast scheduling problem of specifying the timing and frequency of publishing content to maximise the attention received. We validate and quantify three interacting behavioural phenomena to parametrise social platform users: information overload, bursty circadian rhythms and monotony aversion, which is defined here for the first time. Our analysis of the influence of monotony refutes the common assumption that posts on social network timelines are consumed piecemeal independently. Instead, we reveal that posts are consumed in chunks, which has important consequences for any future work considering human behaviour over social network timelines. Our quantification of monotony aversion is also novel, and has applications to problems in various domains such as recommender list diversification, user satiation and variety-seeking consumer behaviour. Having studied the underlying behavioural phenomena, we link schedules, timelines, attention and behaviour by formalising a timeline information exchange process. Our formulation gives rise to a natural objective function that quantifies the expected collective attention an arrangement of posts on a timeline will receive. We apply this formulation as a case-study on real-data from Twitter, where we estimate behavioural parameters, calculate the attention potential for different scheduling strategies and, using the

  3. TECHNICAL COORDINATION, SCHEDULE AND INTEGRATION

    CERN Multimedia

    A. Ball

    Introduction and Schedule After nearly seven months of concentrated effort, the installation of services on YB0 moved off the CMS critical path in late November. In line with v36 planning provisions, the additional time needed to finish this challeng¬ing task was accommodated by reducing sequential dependencies between assembly tasks, putting more tasks (especially heavy logistic movements) in parallel with activities on, or within, the central wheel. Thus the lowering of wheels YB-1 and YB -2 and of disk YE-3 is already complete, the latter made possible, in the shadow of YB0 work, by inverting the order of the 3 endcap disks in the surface building. Weather conditions permitting, the Tracker will be transported to point 5 during CMS week for insertion in EB before CERN closes. The lowering of the last two disks will take place mid- and end-of January, respectively. Thus central beampipe installation can be confidently planned to start in February as foreseen, allowing closure of CMS in time for CRA...

  4. Gemcitabine and cisplatin in locally advanced and metastatic bladder cancer; 3- or 4-week schedule?

    DEFF Research Database (Denmark)

    Als, Anne Birgitte; Sengeløv, Lisa; Von Der Maase, Hans

    2008-01-01

    -week schedule and comparisons of the feasibility and toxicity between the two schedules have not previously been published. MATERIAL AND METHODS: We performed a retrospective analysis of patients with stage IV TCC, treated with GC by a standard 4-week or by an alternative 3-week schedule. RESULTS......: A total of 212 patients received GC (3-week; n = 151, 4-week; n = 61). We found no statistical differences in overall survival between the two schedules (hazard ratio 1.15, 95% CI 0.83-1.59), p = 0.40). Five-year survival rates were 14.9% and 11.8% for the 3- and 4-week schedule, respectively (p = 0...... intensity for gemcitabine was accordingly lower in the 4 week-schedule. The higher dose intensity of cisplatin in the 3-week schedule, did not lead to increased renal toxicity. In 13 patients with impaired renal function, cisplatin was split into 2 days, which was feasible and efficient. CONCLUSION...

  5. Autonomous power system: Integrated scheduling

    Science.gov (United States)

    Ringer, Mark J.

    1992-01-01

    The Autonomous Power System (APS) project at NASA Lewis Research Center is designed to demonstrate the abilities of integrated intelligent diagnosis, control and scheduling techniques to space power distribution hardware. The project consists of three elements: the Autonomous Power Expert System (APEX) for fault diagnosis, isolation, and recovery (FDIR), the Autonomous Intelligent Power Scheduler (AIPS) to determine system configuration, and power hardware (Brassboard) to simulate a space-based power system. Faults can be introduced into the Brassboard and in turn, be diagnosed and corrected by APEX and AIPS. The Autonomous Intelligent Power Scheduler controls the execution of loads attached to the Brassboard. Each load must be executed in a manner that efficiently utilizes available power and satisfies all load, resource, and temporal constraints. In the case of a fault situation on the Brassboard, AIPS dynamically modifies the existing schedule in order to resume efficient operation conditions. A database is kept of the power demand, temporal modifiers, priority of each load, and the power level of each source. AIPS uses a set of heuristic rules to assign start times and resources to each load based on load and resource constraints. A simple improvement engine based upon these heuristics is also available to improve the schedule efficiency. This paper describes the operation of the Autonomous Intelligent Power Scheduler as a single entity, as well as its integration with APEX and the Brassboard. Future plans are discussed for the growth of the Autonomous Intelligent Power Scheduler.

  6. Constraint-based scheduling applying constraint programming to scheduling problems

    CERN Document Server

    Baptiste, Philippe; Nuijten, Wim

    2001-01-01

    Constraint Programming is a problem-solving paradigm that establishes a clear distinction between two pivotal aspects of a problem: (1) a precise definition of the constraints that define the problem to be solved and (2) the algorithms and heuristics enabling the selection of decisions to solve the problem. It is because of these capabilities that Constraint Programming is increasingly being employed as a problem-solving tool to solve scheduling problems. Hence the development of Constraint-Based Scheduling as a field of study. The aim of this book is to provide an overview of the most widely used Constraint-Based Scheduling techniques. Following the principles of Constraint Programming, the book consists of three distinct parts: The first chapter introduces the basic principles of Constraint Programming and provides a model of the constraints that are the most often encountered in scheduling problems. Chapters 2, 3, 4, and 5 are focused on the propagation of resource constraints, which usually are responsibl...

  7. Outpatient Appointment Scheduling with Variable Interappointment Times

    Directory of Open Access Journals (Sweden)

    Song Foh Chew

    2011-01-01

    Full Text Available Healthcare currently consumes 17% of the U.S. Gross Domestic Product and is expected to reach 20% within the coming decade. Confronted with such high costs, sharp demand, and limited capacity, many hospitals now are vying for shorter lengths of stay and are transferring services from inpatient to outpatient facilities. This paper seeks to develop a methodology for constructing effective outpatient appointment scheduling systems. The objective of these appointment systems is to minimize the average total cost function describing total costs incurred by patient waiting and by staff idle time and overtime. In the paper, we will establish that the average total cost function exhibits a unimodal curve. The lowest point of the curve essentially means the lowest average total cost. We will next develop a simulation-based heuristic algorithm for finding an outpatient schedule near the lowest point. In the paper, we present numerical examples using the heuristic based upon a set of predetermined unit costs. Specifically, we find the near optimal interappointment times for schedules, where there are two and three patients in each block, respectively. The current work does not consider possible no shows and walk-ins. Future work will undertake these issues.

  8. Scrambling the Nest Egg: How Well Do Teachers Understand Their Pensions, and What Do They Think about Alternative Pension Structures? Working Paper 51

    Science.gov (United States)

    DeArmond, Michael; Goldhaber, Dan

    2010-01-01

    This paper addresses two questions: How well do teachers understand their current pension plans? And, what do they think about alternative plan structures? The data come from administrative records and a 2006 survey of teachers in Washington State. The results suggest Washington's teachers are fairly knowledgeable about their pensions, though new…

  9. Sensor Transmission Power Schedule for Smart Grids

    Science.gov (United States)

    Gao, C.; Huang, Y. H.; Li, J.; Liu, X. D.

    2017-11-01

    Smart grid has attracted much attention by the requirement of new generation renewable energy. Nowadays, the real-time state estimation, with the help of phasor measurement unit, plays an important role to keep smart grid stable and efficient. However, the limitation of the communication channel is not considered by related work. Considering the familiar limited on-board batteries wireless sensor in smart grid, transmission power schedule is designed in this paper, which minimizes energy consumption with proper EKF filtering performance requirement constrain. Based on the event-triggered estimation theory, the filtering algorithm is also provided to utilize the information contained in the power schedule. Finally, its feasibility and performance is demonstrated using the standard IEEE 39-bus system with phasor measurement units (PMUs).

  10. Alternative Fuels

    Science.gov (United States)

    Alternative fuels include gaseous fuels such as hydrogen, natural gas, and propane; alcohols such as ethanol, methanol, and butanol; vegetable and waste-derived oils; and electricity. Overview of alternative fuels is here.

  11. Family Roles as Moderators of the Relationship between Schedule Flexibility and Stress

    Science.gov (United States)

    Jang, Soo Jung; Zippay, Allison; Park, Rhokeun

    2012-01-01

    Employer initiatives that address the spillover of work strain onto family life include flexible work schedules. This study explored the mediating role of negative work-family spillover in the relationship between schedule flexibility and employee stress and the moderating roles of gender, family workload, and single-parent status. Data were drawn…

  12. Immunization Schedules for Infants and Children

    Science.gov (United States)

    ... ACIP Vaccination Recommendations Why Immunize? Vaccines: The Basics Immunization Schedule for Infants and Children (Birth through 6 ... any questions please talk to your doctor. 2018 Immunization Schedule Recommended Vaccinations for Infants and Children Schedule ...

  13. When greediness fails: examples from stochastic scheduling

    NARCIS (Netherlands)

    Uetz, Marc Jochen

    2003-01-01

    The purpose of this paper is to present examples for the sometimes surprisingly different behavior of deterministic and stochastic scheduling problems. In particular, it demonstrates some seemingly counterintuitive properties of optimal scheduling policies for stochastic machine scheduling problems.

  14. Immunization Schedules for Preteens and Teens

    Science.gov (United States)

    ... Vaccines: The Basics Immunization Schedule for Preteens and Teens (7 through 18 Years) Recommend on Facebook Tweet ... 2018 Immunization Schedule Recommended Vaccinations for Preteens and Teens Schedule for preteens and teens (7 through 18 ...

  15. Scheduling Spitzer: The SIRPASS Story

    Science.gov (United States)

    Mittman, David S.; Hawkins, Robert

    2013-01-01

    NASA's Spitzer Space Telescope was launched on August 25, 2003 from Florida's Cape Canaveral Air Force Base. Drifting in a unique Earth-trailing orbit around the Sun, Spitzer sees an optically invisible universe dominated by dust and stars. Since 1997, the Spitzer Integrated Resource Planning and Scheduling System (SIRPASS) has helped produce spacecraft activity plans for the Spitzer Space Telescope. SIRPASS is used by members of the Observatory Planning and Scheduling Team to plan, schedule and sequence the Telescope from data made available to them from the science and engineering community. Because of the volume of data that needs to be scheduled, SIRPASS offers a variety of automated assistants to aid in this task. This paper will describe the functional elements of the SIRPASS software system -- emphasizing the role that automation plays in the system -- and will highlight lessons learned for the software developer from a decade of Spitzer Space Telescope operations experience.

  16. Executive Schedule C System (ESCS)

    Data.gov (United States)

    Office of Personnel Management — Used to store information on Federal employees in the Senior Executive Service (SES) and appointed employees in the Schedule C System. Every four years, just after...

  17. Schedule Sales Query Raw Data

    Data.gov (United States)

    General Services Administration — Schedule Sales Query presents sales volume figures as reported to GSA by contractors. The reports are generated as quarterly reports for the current year and the...

  18. Multiagent scheduling models and algorithms

    CERN Document Server

    Agnetis, Alessandro; Gawiejnowicz, Stanisław; Pacciarelli, Dario; Soukhal, Ameur

    2014-01-01

    This book presents multi-agent scheduling models in which subsets of jobs sharing the same resources are evaluated by different criteria. It discusses complexity results, approximation schemes, heuristics and exact algorithms.

  19. Future aircraft networks and schedules

    Science.gov (United States)

    Shu, Yan

    2011-07-01

    Because of the importance of air transportation scheduling, the emergence of small aircraft and the vision of future fuel-efficient aircraft, this thesis has focused on the study of aircraft scheduling and network design involving multiple types of aircraft and flight services. It develops models and solution algorithms for the schedule design problem and analyzes the computational results. First, based on the current development of small aircraft and on-demand flight services, this thesis expands a business model for integrating on-demand flight services with the traditional scheduled flight services. This thesis proposes a three-step approach to the design of aircraft schedules and networks from scratch under the model. In the first step, both a frequency assignment model for scheduled flights that incorporates a passenger path choice model and a frequency assignment model for on-demand flights that incorporates a passenger mode choice model are created. In the second step, a rough fleet assignment model that determines a set of flight legs, each of which is assigned an aircraft type and a rough departure time is constructed. In the third step, a timetable model that determines an exact departure time for each flight leg is developed. Based on the models proposed in the three steps, this thesis creates schedule design instances that involve almost all the major airports and markets in the United States. The instances of the frequency assignment model created in this thesis are large-scale non-convex mixed-integer programming problems, and this dissertation develops an overall network structure and proposes iterative algorithms for solving these instances. The instances of both the rough fleet assignment model and the timetable model created in this thesis are large-scale mixed-integer programming problems, and this dissertation develops subproblem schemes for solving these instances. Based on these solution algorithms, this dissertation also presents

  20. An Empirical Study of Online Packet Scheduling Algorithms

    OpenAIRE

    Sakr, Nourhan; Stein, Cliff

    2016-01-01

    This work studies online scheduling algorithms for buffer management, develops new algorithms, and analyzes their performances. Packets arrive at a release time r, with a non-negative weight w and an integer deadline d. At each time step, at most one packet is scheduled. The modified greedy (MG) algorithm is 1.618-competitive for the objective of maximizing the sum of weights of packets sent, assuming agreeable deadlines. We analyze the empirical behavior of MG in a situation with arbitrary d...

  1. Display Requirements for an Interactive Rail Scheduling Display

    OpenAIRE

    Tappan, Jacqueline Marie; Pitman, David J.; Cummings, M. L.; Miglianico, Denis

    2011-01-01

    This work, a collaboration between Alstom Transport and the MIT Humans and Automation Laboratory (HAL), is focused on the development of an interactive in-cab scheduling interface for train operators. Currently, operators rely on a combination of paper schedules, paper speed charts, and rote memorization to meet the many demands of train operation. The separation of this information over multiple sources shifts driver attention away from the windscreen and may result in incr...

  2. Workload Schedulers - Genesis, Algorithms and Comparisons

    OpenAIRE

    Sliwko, L.; Getov, Vladimir

    2015-01-01

    In this article we provide brief descriptions of three classes of schedulers: Operating Systems Process Schedulers, Cluster Systems, Jobs Schedulers and Big Data Schedulers. We describe their evolution from early adoptions to modern implementations, considering both the use and features of algorithms. In summary, we discuss differences between all presented classes of schedulers and discuss their chronological development. In conclusion, we highlight similarities in the focus of scheduling st...

  3. Reinforcement and punishment effects in concurrent schedules: A test of two models

    OpenAIRE

    Farley, Joseph

    1980-01-01

    The joint effects of punishment and reinforcement on the pigeon's key-peck response were examined in three choice experiments conducted to compare predictions of Farley and Fantino's (1978) subtractive model with those made by Deluty's (1976) and Deluty and Church's (1978) model of punishment. In Experiment 1, the addition of equal punishment schedules to both alternatives of a concurrent reinforcement schedule enhanced the preference exhibited for the more frequent reinforcement alternative....

  4. Non-clairvoyant Scheduling Games

    Science.gov (United States)

    Dürr, Christoph; Nguyen, Kim Thang

    In a scheduling game, each player owns a job and chooses a machine to execute it. While the social cost is the maximal load over all machines (makespan), the cost (disutility) of each player is the completion time of its own job. In the game, players may follow selfish strategies to optimize their cost and therefore their behaviors do not necessarily lead the game to an equilibrium. Even in the case there is an equilibrium, its makespan might be much larger than the social optimum, and this inefficiency is measured by the price of anarchy - the worst ratio between the makespan of an equilibrium and the optimum. Coordination mechanisms aim to reduce the price of anarchy by designing scheduling policies that specify how jobs assigned to a same machine are to be scheduled. Typically these policies define the schedule according to the processing times as announced by the jobs. One could wonder if there are policies that do not require this knowledge, and still provide a good price of anarchy. This would make the processing times be private information and avoid the problem of truthfulness. In this paper we study these so-called non-clairvoyant policies. In particular, we study the RANDOM policy that schedules the jobs in a random order without preemption, and the EQUI policy that schedules the jobs in parallel using time-multiplexing, assigning each job an equal fraction of CPU time.

  5. Alternative Medicine and Your Child

    Science.gov (United States)

    ... for Educators Search English Español Complementary and Alternative Medicine KidsHealth / For Parents / Complementary and Alternative Medicine What's ... why it works. How CAM Differs From Traditional Medicine CAM is frequently distinguished by its holistic methods, ...

  6. Biomonitoring of physiological status and cognitive performance of underway submariners undergoing a novel watch-standing schedule

    Science.gov (United States)

    Duplessis, C. A.; Cullum, M. E.; Crepeau, L. J.

    2005-05-01

    Submarine watch-standers adhere to a 6 hour-on, 12 hour-off (6/12) watch-standing schedule, yoking them to an 18-hr day, engendering circadian desynchronization and chronic sleep deprivation. Moreover, the chronic social crowding, shift work, and confinement of submarine life provide additional stressors known to correlate with elevated secretory immunoglobulin A (sIgA) and cortisol levels, reduced performance, immunologic dysfunction, malignancies, infections, gastrointestinal illness, coronary disease, anxiety, and depression. We evaluated an alternative, compressed, fixed work schedule designed to enhance circadian rhythm entrainment, sleep hygiene, performance, and health on 10 underway submariners, who followed the alternative and 6/12 schedules for approximately 2 weeks each. We measured subjects" sleep, cognitive performance, and salivary biomarker levels. Pilot analysis of the salivary data on one subject utilizing ELISA suggests elevated biomarker levels of stress. Average PM cortisol levels were 0.2 μg/L (normal range: nondetectable - 0.15 μg/L), and mean sIgA levels were 562 μg/ml (normal range: 100-500 μg/ml). Future research exploiting real-time salivary bioassays, via fluorescent polarimetry technology, identified by the Office of Naval Research (ONR) as a future Naval requirement, allows researchers to address correlations between stress-induced elaboration of salivary biomarkers with physiological and performance decrements, thereby fostering insight into the underway submariner"s psychoimmunological status. This may help identify strategies that enhance resilience to stressors. Specifically, empirically-based modeling can identify optimal watch-standing schedules and stress-mitigating procedures -- within the operational constraints of the submarine milieu and the mission --that foster improved circadian entrainment and reduced stress reactivity, enhancing physiological health, operational performance, safety, and job satisfaction.

  7. Collaborative Work as an Alternative for Writing Research Articles (El trabajo colaborativo como alternativa para la escritura de artículos investigativos)

    Science.gov (United States)

    Carvajal Medina, Nancy Emilce; Roberto Flórez, Eliana Edith

    2014-01-01

    Academic writing in English in our context is a significant aspect that can be innovative when a convergence model of writing stages is used along with collaborative work. This article reports on a study aimed at analyzing how collaborative work relates to undergraduate electronics students' academic writing development in English as a foreign…

  8. The GBT Dynamic Scheduling System: Scheduling Applications of the Knapsack Problem and Sudoku

    Science.gov (United States)

    Sessoms, E.; Clark, M.; Marganian, P.; McCarty, M.; Shelton, A.

    2009-09-01

    We applied algorithmic approaches to both theoretical and practical aspects of scheduling the Robert C. Byrd Green Bank Telescope (GBT). When using a theoretical approach to scheduling, assigning a numerical value, or score, to a telescope period is only half of the problem. The other half consists of using the score to determine the best global arrangement of the telescope periods in order to maximize the scientific throughput of the telescope. The naive brute-force approach of trying all possible schedules is too computationally expensive. Instead we applied a well-studied approach from operations research, known as dynamic programming. Specifically, we found the so-called ``knapsack'' algorithm to be a good fit to this problem. On the other hand, we cannot actually achieve maximum theoretical efficiency due to many practical constraints on telescope scheduling. The most severe practical constraints are fixed periods that must be scheduled at a specific date and time regardless of possible score and windowed periods that must be scheduled in regular, recurring intervals. The primary difficulty in scheduling fixed and windowed sessions is that they have the potential to conflict and even to generate irresolvable conflicts (double booking). In working on this problem, we realized it shared many characteristics with the game of Sudoku. In Sudoku, there are many possible arrangements of the recurring numbers 1 through 9 (telescope sessions). Some of these are fixed (the hints) and the others must live in windows (distinct groups having one instance each of each digit). Sudoku puzzles are solved algorithmically using a heuristic-guided brute-force search. We followed a similar approach. A full brute-force search is, again, too computationally expensive, but we found ways to restrict the search enough to make it feasible. We used a number of heuristics but found the largest gains came from partitioning the problem into distinct subsets than can each be scheduled

  9. 75 FR 42831 - Proposed Collection; Comment Request for Form 1065, Schedule C, Schedule D, Schedule K-1...

    Science.gov (United States)

    2010-07-22

    .... Return of Partnership Income), Schedule D (Capital Gains and Losses), Schedule K-1 (Partner's Share of...' Capital Accounts), and Schedule M-3 (Net Income (Loss) Reconciliation for Certain Partnerships)). DATES... Partnership Income (Form 1065), Capital Gains and Losses (Schedule D), Partner's Share of Income, Credits...

  10. NRC comprehensive records disposition schedule

    International Nuclear Information System (INIS)

    1983-05-01

    Effective January 1, 1982, NRC will institute records retention and disposal practives in accordance with the approved Comprehensive Records Disposition Schedule (CRDS). CRDS is comprised of NRC Schedules (NRCS) 1 to 4 which apply to the agency's program or substantive records and General Records Schedules (GRS) 1 to 24 which apply to housekeeping or facilitative records. NRCS-I applies to records common to all or most NRC offices; NRCS-II applies to program records as found in the various offices of the Commission, Atomic Safety and Licensing Board Panel, and the Atomic Safety and Licensing Appeal Panel; NRCS-III applies to records accumulated by the Advisory Committee on Reactor Safeguards; and NRCS-IV applies to records accumulated in the various NRC offices under the Executive Director for Operations. The schedules are assembled functionally/organizationally to facilitate their use. Preceding the records descriptions and disposition instructions for both NRCS and GRS, there are brief statements on the organizational units which accumulate the records in each functional area, and other information regarding the schedules' applicability

  11. Environmental surveillance master sampling schedule

    International Nuclear Information System (INIS)

    Bisping, L.E.

    1991-01-01

    Environmental surveillance of the Hanford Site and surrounding areas is conducted by the Pacific Northwest Laboratory (PNL) for the US Department of Energy (DOE). This document contains the planned schedule for routine sample collection for the Surface Environmental Surveillance Project (SESP) and Ground-Water Monitoring Project. The routine sampling plan for the SESP has been revised this year to reflect changing site operations and priorities. Some sampling previously performed at least annually has been reduced in frequency, and some new sampling to be performed at a less than annual frequency has been added. Therefore, the SESP schedule reflects sampling to be conducted in calendar year 1991 as well as future years. The ground-water sampling schedule is for 1991. This schedule is subject to modification during the year in response to changes in Site operation, program requirements, and the nature of the observed results. Operational limitations such as weather, mechanical failures, sample availability, etc., may also require schedule modifications. Changes will be documented in the respective project files, but this plan will not be reissued. The purpose of these monitoring projects is to evaluate levels of radioactive and nonradioactive pollutants in the Hanford evirons

  12. Environmental surveillance master sampling schedule

    Energy Technology Data Exchange (ETDEWEB)

    Bisping, L.E.

    1991-01-01

    Environmental surveillance of the Hanford Site and surrounding areas is conducted by the Pacific Northwest Laboratory (PNL) for the US Department of Energy (DOE). This document contains the planned schedule for routine sample collection for the Surface Environmental Surveillance Project (SESP) and Ground-Water Monitoring Project. The routine sampling plan for the SESP has been revised this year to reflect changing site operations and priorities. Some sampling previously performed at least annually has been reduced in frequency, and some new sampling to be performed at a less than annual frequency has been added. Therefore, the SESP schedule reflects sampling to be conducted in calendar year 1991 as well as future years. The ground-water sampling schedule is for 1991. This schedule is subject to modification during the year in response to changes in Site operation, program requirements, and the nature of the observed results. Operational limitations such as weather, mechanical failures, sample availability, etc., may also require schedule modifications. Changes will be documented in the respective project files, but this plan will not be reissued. The purpose of these monitoring projects is to evaluate levels of radioactive and nonradioactive pollutants in the Hanford evirons.

  13. Sensor-scheduling simulation of disparate sensors for Space Situational Awareness

    Science.gov (United States)

    Hobson, T.; Clarkson, I.

    2011-09-01

    The art and science of space situational awareness (SSA) has been practised and developed from the time of Sputnik. However, recent developments, such as the accelerating pace of satellite launch, the proliferation of launch capable agencies, both commercial and sovereign, and recent well-publicised collisions involving man-made space objects, has further magnified the importance of timely and accurate SSA. The United States Strategic Command (USSTRATCOM) operates the Space Surveillance Network (SSN), a global network of sensors tasked with maintaining SSA. The rapidly increasing number of resident space objects will require commensurate improvements in the SSN. Sensors are scarce resources that must be scheduled judiciously to obtain measurements of maximum utility. Improvements in sensor scheduling and fusion, can serve to reduce the number of additional sensors that may be required. Recently, Hill et al. [1] have proposed and developed a simulation environment named TASMAN (Tasking Autonomous Sensors in a Multiple Application Network) to enable testing of alternative scheduling strategies within a simulated multi-sensor, multi-target environment. TASMAN simulates a high-fidelity, hardware-in-the-loop system by running multiple machines with different roles in parallel. At present, TASMAN is limited to simulations involving electro-optic sensors. Its high fidelity is at once a feature and a limitation, since supercomputing is required to run simulations of appreciable scale. In this paper, we describe an alternative, modular and scalable SSA simulation system that can extend the work of Hill et al with reduced complexity, albeit also with reduced fidelity. The tool has been developed in MATLAB and therefore can be run on a very wide range of computing platforms. It can also make use of MATLAB’s parallel processing capabilities to obtain considerable speed-up. The speed and flexibility so obtained can be used to quickly test scheduling algorithms even with a

  14. Scheduled meals and scheduled palatable snacks synchronize circadian rhythms: consequences for ingestive behavior.

    Science.gov (United States)

    Escobar, Carolina; Salgado, Roberto; Rodriguez, Katia; Blancas Vázquez, Aurea Susana; Angeles-Castellanos, Manuel; Buijs, Ruud M

    2011-09-26

    Food is a potent time signal for the circadian system and has shown to entrain and override temporal signals transmitted by the biological clock, the suprachiasmatic nucleus, which adjusts mainly to the daily light/dark (LD) alternation. Organisms mostly ingest food in their active period and this permits a correct coordination between the LD and the food elicited time signals with the circadian system. Under conditions when feeding opportunities are shifted to the usual resting/sleep phase, the potent entraining force of food, shifts circadian fluctuations in several tissues, organs, and brain structures toward meal time, resulting a desynchrony within the body and between the organism and the external LD cycle. The daily scheduled access to a palatable snack exerts similar changes specifically to brain areas involved in motivation and reward responses. This review describes the phenomenology of food entrainment and entrainment by a palatable snack. It suggests how scheduled feeding can lead to food addiction and how shifted feeding schedules toward the sleep phase can result in altered ingestive behavior, obesity and disturbed metabolic responses. Copyright © 2011 Elsevier Inc. All rights reserved.

  15. Using a vision cognitive algorithm to schedule virtual machines

    Directory of Open Access Journals (Sweden)

    Zhao Jiaqi

    2014-09-01

    Full Text Available Scheduling virtual machines is a major research topic for cloud computing, because it directly influences the performance, the operation cost and the quality of services. A large cloud center is normally equipped with several hundred thousand physical machines. The mission of the scheduler is to select the best one to host a virtual machine. This is an NPhard global optimization problem with grand challenges for researchers. This work studies the Virtual Machine (VM scheduling problem on the cloud. Our primary concern with VM scheduling is the energy consumption, because the largest part of a cloud center operation cost goes to the kilowatts used. We designed a scheduling algorithm that allocates an incoming virtual machine instance on the host machine, which results in the lowest energy consumption of the entire system. More specifically, we developed a new algorithm, called vision cognition, to solve the global optimization problem. This algorithm is inspired by the observation of how human eyes see directly the smallest/largest item without comparing them pairwisely. We theoretically proved that the algorithm works correctly and converges fast. Practically, we validated the novel algorithm, together with the scheduling concept, using a simulation approach. The adopted cloud simulator models different cloud infrastructures with various properties and detailed runtime information that can usually not be acquired from real clouds. The experimental results demonstrate the benefit of our approach in terms of reducing the cloud center energy consumption

  16. Deadline sensitive lease scheduling in cloud computing environment using AHP

    Directory of Open Access Journals (Sweden)

    Suvendu Chandan Nayak

    2018-04-01

    Full Text Available The OpenNebula is an open source environment which provides cloud resources with the help of Haizea as a lease manager. The Haizea supports different types of leases from which deadline sensitive lease is one of them. In real time, most of the leases are deadline sensitive leases. These deadline sensitive leases are scheduled by using the backfilling algorithm. In the backfilling algorithm one of the lease is selected from the best effort queue which will provide the free resources to schedule the deadline sensitive lease. But in some scenario backfilling algorithm does not provide better scheduling if there is similar types of leases and must be in conjugative in sequence. This work aims to use AHP (Analytic Hierarchy Process as a decision maker in the backfilling algorithm to choose the possible best lease from the given best effort queue in order to schedule the deadline sensitive lease. The proposed work improves the performance of the backfilling algorithm by scheduling more number of leases and minimizing the lease rejection using AHP. Keywords: OpenNebula, Deadline sensitive, Haizea, Backfilling, Scheduling, AHP

  17. Mixed Criticality Scheduling for Industrial Wireless Sensor Networks

    Directory of Open Access Journals (Sweden)

    Xi Jin

    2016-08-01

    Full Text Available Wireless sensor networks (WSNs have been widely used in industrial systems. Their real-time performance and reliability are fundamental to industrial production. Many works have studied the two aspects, but only focus on single criticality WSNs. Mixed criticality requirements exist in many advanced applications in which different data flows have different levels of importance (or criticality. In this paper, first, we propose a scheduling algorithm, which guarantees the real-time performance and reliability requirements of data flows with different levels of criticality. The algorithm supports centralized optimization and adaptive adjustment. It is able to improve both the scheduling performance and flexibility. Then, we provide the schedulability test through rigorous theoretical analysis. We conduct extensive simulations, and the results demonstrate that the proposed scheduling algorithm and analysis significantly outperform existing ones.

  18. How do employees prioritise when they schedule their own shifts?

    DEFF Research Database (Denmark)

    Nabe-Nielsen, Kirsten; Lund, Henrik; Hansen, Åse Marie

    2013-01-01

    We investigated how employees prioritised when they scheduled their own shifts and whether priorities depended on age, gender, educational level, cohabitation and health status. We used cross-sectional questionnaire data from the follow-up survey of an intervention study investigating the effect...... to their family life, having consecutive time off, leisure-time activities, rest between shifts, sleep, regularity of their everyday life, health and that the work schedule balanced. Thus, employees consider both their own and the workplace's needs when they have the opportunity to schedule their own shifts. Age......, gender, cohabitation and health status were all significantly associated with at least one of these priorities. Practitioner Summary: Intervention studies report limited health effects of self-scheduling. Therefore, we investigated to what extent employees prioritise their health and recuperation when...

  19. The Single And Multi Project Approach To Planning And Scheduling

    DEFF Research Database (Denmark)

    Andersson, Niclas

    2008-01-01

    , reallocations of subcontracting resources lead to project interruptions which counteract on the overall productivity of the single construction project. Thus, there is a planning and scheduling conflict between the operational multi project management of the subcontracting firm and the management of single...... projects carried out by the management on site. This paper explains the single and multi project perspective on construction planning and scheduling represented by the main and the subcontractors and further, it describes how the prevailing scheduling method of today, i.e. the critical path method, conduce......The fragmentation of the construction industry in Denmark is reflected in the organisation of construction projects, which typically involves a large number of subcontractors. The main contractor, being responsible for the planning and scheduling of construction work, is thus faced...

  20. Using the principles of circadian physiology enhances shift schedule design

    International Nuclear Information System (INIS)

    Connolly, J.J.; Moore-Ede, M.C.

    1987-01-01

    Nuclear power plants must operate 24 h, 7 days a week. For the most part, shift schedules currently in use at nuclear power plants have been designed to meet operational needs without considering the biological clocks of the human operators. The development of schedules that also take circadian principles into account is a positive step that can be taken to improve plant safety by optimizing operator alertness. These schedules reduce the probability of human errors especially during backshifts. In addition, training programs that teach round-the-clock workers how to deal with the problems of shiftwork can help to optimize performance and alertness. These programs teach shiftworkers the underlying causes of the sleep problems associated with shiftwork and also provide coping strategies for improving sleep and dealing with the transition between shifts. When these training programs are coupled with an improved schedule, the problems associated with working round-the-clock can be significantly reduced

  1. Enhanced OTSG economics optimizing CAPEX + OPEX + Schedule

    Energy Technology Data Exchange (ETDEWEB)

    Armstrong, Peter [KTI Engineered to Perform (Canada)

    2011-07-01

    This presentation gives an insight into the economics involved in producing once-through steam (OTSG) generators in Canada and it offers a proposal for improving returns in the industry. The objective of this presentation was to show the importance of developing OTSG manufacturing based on the future of this technology. The growing demand for OTSG by oil companies was presented, suggesting that this is a good time to put effort into developing more efficient designs. After the background of this technology was discussed, several economical aspects of the process were addressed; for instance, reducing capital expenditure (CAPEX) and operation expenditure (OPEX), outsourcing production, and project scheduling and execution. Initiatives proposed included: reducing plot size, producing larger OTSGs, reducing downtime, using alternative fuels, forming a global manufacturing network, and avoiding order blockage. Finally, the idea of designing a portable OTSG was proposed, showing its flexibility in oil extraction projects.

  2. Gain scheduling using the Youla parameterization

    DEFF Research Database (Denmark)

    Niemann, Hans Henrik; Stoustrup, Jakob

    1999-01-01

    Gain scheduling controllers are considered in this paper. The gain scheduling problem where the scheduling parameter vector cannot be measured directly, but needs to be estimated is considered. An estimation of the scheduling vector has been derived by using the Youla parameterization. The use of...

  3. Gain scheduling using the youla parameterization

    DEFF Research Database (Denmark)

    Niemann, H.H.; Stoustrup, Jakob

    1999-01-01

    Gain scheduling controllers are considered in this paper. The gain scheduling problem where the scheduling parameter vector theta cannot be measured directly, but needs to be estimated is considered. An estimation of the scheduling vector theta has been derived by using the Youla parameterization...

  4. Environmental surveillance master sampling schedule

    International Nuclear Information System (INIS)

    Bisping, L.E.

    1997-01-01

    Environmental surveillance of the Hanford Site and surrounding areas is conducted by the Pacific Northwest National Laboratory (PNNL)(a) for the US Department of Energy (DOE). This document contains the planned 1997 schedules for routine collection of samples for the Surface Environmental Surveillance Project (SESP) and Drinking Water Monitoring Project. In addition, Section 3.0, Biota, also reflects a rotating collection schedule identifying the year a specific sample is scheduled for collection. The purpose of these monitoring projects is to evaluate levels of radioactive and nonradioactive pollutants in the Hanford environs, as required in DOE Order 5400.1, General Environmental Protection Program, and DOE Order 5400.5, Radiation Protection of the Public and the Environment. The sampling methods will be the same as those described in the Environmental Monitoring Plan, US Department of Energy, Richland Operations Office, DOE/RL91-50, Rev. 1, US Department of Energy, Richland, Washington

  5. Schedulability Analysis for Java Finalizers

    DEFF Research Database (Denmark)

    Bøgholm, Thomas; Hansen, Rene Rydhof; Søndergaard, Hans

    2010-01-01

    Java finalizers perform clean-up and finalisation of objects at garbage collection time. In real-time Java profiles the use of finalizers is either discouraged (RTSJ, Ravenscar Java) or even disallowed (JSR-302), mainly because of the unpredictability of finalizers and in particular their impact...... on the schedulability analysis. In this paper we show that a controlled scoped memory model results in a structured and predictable execution of finalizers, more reminiscent of C++ destructors than Java finalizers. Furthermore, we incorporate finalizers into a (conservative) schedulability analysis for Predictable Java...... programs. Finally, we extend the SARTS tool for automated schedulability analysis of Java bytecode programs to handle finalizers in a fully automated way....

  6. Optimal randomized scheduling by replacement

    Energy Technology Data Exchange (ETDEWEB)

    Saias, I.

    1996-05-01

    In the replacement scheduling problem, a system is composed of n processors drawn from a pool of p. The processors can become faulty while in operation and faulty processors never recover. A report is issued whenever a fault occurs. This report states only the existence of a fault but does not indicate its location. Based on this report, the scheduler can reconfigure the system and choose another set of n processors. The system operates satisfactorily as long as, upon report of a fault, the scheduler chooses n non-faulty processors. We provide a randomized protocol maximizing the expected number of faults the system can sustain before the occurrence of a crash. The optimality of the protocol is established by considering a closely related dual optimization problem. The game-theoretic technical difficulties that we solve in this paper are very general and encountered whenever proving the optimality of a randomized algorithm in parallel and distributed computation.

  7. Schedulability Analysis for Java Finalizers

    DEFF Research Database (Denmark)

    Bøgholm, Thomas; Hansen, Rene Rydhof; Ravn, Anders P.

    2010-01-01

    Java finalizers perform clean-up and finalisation of objects at garbage collection time. In real-time Java profiles the use of finalizers is either discouraged (RTSJ, Ravenscar Java) or even disallowed (JSR-302), mainly because of the unpredictability of finalizers and in particular their impact ...... programs. Finally, we extend the SARTS tool for automated schedulability analysis of Java bytecode programs to handle finalizers in a fully automated way.......Java finalizers perform clean-up and finalisation of objects at garbage collection time. In real-time Java profiles the use of finalizers is either discouraged (RTSJ, Ravenscar Java) or even disallowed (JSR-302), mainly because of the unpredictability of finalizers and in particular their impact...... on the schedulability analysis. In this paper we show that a controlled scoped memory model results in a structured and predictable execution of finalizers, more reminiscent of C++ destructors than Java finalizers. Furthermore, we incorporate finalizers into a (conservative) schedulability analysis for Predictable Java...

  8. COMPAS: a European project on the ''comparison of alternative waste management strategies for long-lived radioactive wastes''. Scope, working methods and conclusions

    International Nuclear Information System (INIS)

    Dutton, L.M.C.; Hillis, Z.K.; Roehlig, K.J.

    2004-01-01

    The paper presents the content and major findings of a project on the ''COMParison of Alternative waste management Strategies for long-lived radioactive wastes'' (COMPAS) carried out within the 5 th framework programme of the European commission. Under the leadership of NNC (UK), the project was carried out by individuals representing waste management organisations from 15 European countries. After having compiled information on the nature and amount of long-lived radioactive waste to be managed, issues influencing the selection of waste management strategies and options, presently adopted national strategies as well as options for the future were addressed. Conclusions concerning key issues for the success or otherwise of strategies and management solutions were drawn. (orig.)

  9. Testing a potential alternative to traditional identification procedures: Reaction time-based concealed information test does not work for lineups with cooperative witnesses.

    Science.gov (United States)

    Sauerland, Melanie; Wolfs, Andrea C F; Crans, Samantha; Verschuere, Bruno

    2017-11-27

    Direct eyewitness identification is widely used, but prone to error. We tested the validity of indirect eyewitness identification decisions using the reaction time-based concealed information test (CIT) for assessing cooperative eyewitnesses' face memory as an alternative to traditional lineup procedures. In a series of five experiments, a total of 401 mock eyewitnesses watched one of 11 different stimulus events that depicted a breach of law. Eyewitness identifications in the CIT were derived from longer reaction times as compared to well-matched foil faces not encountered before. Across the five experiments, the weighted mean effect size d was 0.14 (95% CI 0.08-0.19). The reaction time-based CIT seems unsuited for testing cooperative eyewitnesses' memory for faces. The careful matching of the faces required for a fair lineup or the lack of intent to deceive may have hampered the diagnosticity of the reaction time-based CIT.

  10. Artificial intelligence approaches to astronomical observation scheduling

    Science.gov (United States)

    Johnston, Mark D.; Miller, Glenn

    1988-01-01

    Automated scheduling will play an increasing role in future ground- and space-based observatory operations. Due to the complexity of the problem, artificial intelligence technology currently offers the greatest potential for the development of scheduling tools with sufficient power and flexibility to handle realistic scheduling situations. Summarized here are the main features of the observatory scheduling problem, how artificial intelligence (AI) techniques can be applied, and recent progress in AI scheduling for Hubble Space Telescope.

  11. Simulation to Analyze the Impact of a Schedule-aware Workflow Management System

    NARCIS (Netherlands)

    Mans, Ronny S.; Russell, Nick C.; van der Aalst, Wil; Bakker, Piet J. M.; Moleman, Arnold J.

    2010-01-01

    Today's workflow management systems (WfMSs) offer workitems to users through specific work-lists. Users select the workitems they will perform without having a schedule in mind. However, in many environments work needs to be scheduled and performed at particular times. For example, in hospitals many

  12. A visual representation system for the scheduling and management of projects

    NARCIS (Netherlands)

    Pollalis, S.N.

    1992-01-01

    A VISUAL SCHEDULING AND MANAGEMENT SYSTEM (VSMS) This work proposes a new system for the visual representation of projects that displays the quantities of work, resources and cost. This new system, called Visual Scheduling and Management System, has a built-in hierarchical system to provide

  13. Interval algebra - an effective means of scheduling surveillance radar networks

    CSIR Research Space (South Africa)

    Focke, RW

    2015-05-01

    Full Text Available -term planning is desirable, there is still work required to make these practically feasible in all cases. There are various architectures used for creating a mulstisensor man- 3 ager. Traditionally, a centralised architecture has been used, where a central... in the timeline of sensing actions for each sensor. This is known as the scheduling function, which is the focus of this work. A sensor coordination algorithm is considered a nimble scheduler when it is able to rapidly adapt to changes in the surveyed area...

  14. Starshade Observation Scheduling for WFIRST

    Science.gov (United States)

    Soto, Gabriel; Garrett, Daniel; Delacroix, Christian; Savransky, Dmitry

    2018-01-01

    An exoplanet direct imaging mission can employ an external starshade for starlight suppression to achieve higher contrasts and potentially higher throughput than with an internal coronagraph. This separately-launched starshade spacecraft is assumed to maintain a single, constant separation distance from the space telescope—for this study, the Wide Field Infrared Survey Telescope (WFIRST)—based on a designated inner working angle during integration times. The science yield of such a mission can be quantified using the Exoplanet Open-Source Imaging Simulator (EXOSIMS): this simulator determines the distributions of mission outcomes, such as the types and amount of exoplanet detections, based on ensembles of end-to-end simulations of the mission. This study adds a starshade class to the survey simulation module of EXOSIMS and outlines a method for efficiently determining observation schedules. The new starshade class solves boundary value problems using circular restricted three-body dynamics to find fast, high-accuracy estimates of the starshade motion while repositioning between WFIRST observations. Fuel usage dictates the mission lifetime of the starshade given its limited fuel supply and is dominated by the Δv used to reposition the starshade between the LOS of different targets; the repositioning time-of-flight is kept constant in this study. A starshade burns less fuel to reach certain target stars based on their relative projected positions on a skymap; other targets with costly transfers can be filtered out to increase the starshade mission duration. Because the initial target list can consist of nearly 2000 stars, calculating the Δv required to move the starshade to every other star on the target list would be too computationally expensive and renders running ensembles of survey simulations infeasible. Assuming the starshade begins its transfer at the LOS of a certain star, a Δv curve is approximated for the remaining target stars based on their right

  15. Endogenous scheduling preferences and congestion

    DEFF Research Database (Denmark)

    Fosgerau, Mogens; Small, Kenneth

    2010-01-01

    Dynamic models of congestion so far rely on exogenous scheduling preferences of travelers, based for example on disutility of deviation from a preferred departure or arrival time for a trip. This paper provides a more fundamental view in which travelers derive utility just from consumption and le...

  16. Stochastic scheduling on unrelated machines

    NARCIS (Netherlands)

    Skutella, Martin; Sviridenko, Maxim; Uetz, Marc Jochen

    2013-01-01

    Two important characteristics encountered in many real-world scheduling problems are heterogeneous machines/processors and a certain degree of uncertainty about the actual sizes of jobs. The first characteristic entails machine dependent processing times of jobs and is captured by the classical

  17. Environmental surveillance master sampling schedule

    International Nuclear Information System (INIS)

    Bisping, L.E.

    1996-02-01

    Environmental surveillance of the Hanford Site and surrounding areas is conducted by the Pacific Northwest National Laboratory (PNNL) for the US Department of Energy (DOE). This document contains the planned 1996 schedules for routine collection of samples for the Surface Environmental Surveillance Project (SESP), Drinking Water Project, and Ground-Water Surveillance Project

  18. The Vessel Schedule Recovery Problem

    DEFF Research Database (Denmark)

    Brouer, Berit Dangaard; Plum, Christian Edinger Munk; Vaaben, Bo

    Maritime transportation is the backbone of world trade and is accountable for around 3% of the worlds CO2 emissions. We present the Vessel Schedule Recovery Problem (VSRP) to evaluate a given disruption scenario and to select a recovery action balancing the trade off between increased bunker...

  19. Course Scheduling and Academic Performance

    Science.gov (United States)

    Dills, Angela K.; Hernandez-Julian, Rey

    2008-01-01

    This paper examines the relationship between course scheduling and student achievement, controlling for student and course characteristics. The literature in psychology recognizes that performance varies by time of day and that spacing learning out over time may foster greater long-term memory of items. We use student grades as a measure of…

  20. Job scheduling, cooperation and control

    NARCIS (Netherlands)

    Calleja, P.; Estevez Fernandez, M.A.; Borm, P.; Hamers, H.

    2006-01-01

    This paper studies one machine job scheduling situations where clients can have more than one job to be processed and where a job can be of interest for different players. Corresponding cooperative games are introduced and a result on balancedness is provided. © 2005 Elsevier B.V. All rights

  1. Lifetime Improvement by Battery Scheduling

    NARCIS (Netherlands)

    Jongerden, M.R.; Schmitt, Jens B.; Haverkort, Boudewijn R.H.M.

    The use of mobile devices is often limited by the lifetime of their batteries. For devices that have multiple batteries or that have the option to connect an extra battery, battery scheduling, thereby exploiting the recovery properties of the batteries, can help to extend the system lifetime. Due to

  2. Lifetime improvement by battery scheduling

    NARCIS (Netherlands)

    Jongerden, M.R.; Haverkort, Boudewijn R.H.M.

    The use of mobile devices is often limited by the lifetime of its battery. For devices that have multiple batteries or that have the option to connect an extra battery, battery scheduling, thereby exploiting the recovery properties of the batteries, can help to extend the system lifetime. Due to the

  3. A system simulation model applied to the production schedule of a fish processing facility

    Directory of Open Access Journals (Sweden)

    Carla Roberta Pereira

    2012-11-01

    Full Text Available The simulation seeks to import the reality to a controlled environment, where it is possible to study it behavior, under several conditions, without involving physical risks and/or high costs. Thus, the system simulation becomes a useful and powerful technique in emergence markets, as the tilapiculture sector that needs to expand its business. The main purpose of this study was the development of a simulation model to assist the decisions making of the production scheduling of a fish processing facility. It was applied, as research method, the case study and the modeling/simulation, including in this set the SimuCAD methodology and the development phases of a simulation model. The model works with several alternative scenarios, testing different working shifts, types of flows and production capacity, besides variations of the ending inventory and sales. The result of this research was a useful and differentiated model simulation to assist the decision making of the production scheduling of fish processing facility studied.

  4. 78 FR 58264 - Refuge Alternatives for Underground Coal Mines

    Science.gov (United States)

    2013-09-23

    ... Refuge Alternatives for Underground Coal Mines AGENCY: Mine Safety and Health Administration, Labor... Agency's Request for Information (RFI) on Refuge Alternatives for Underground Coal Mines. This extension... Alternatives for Underground Coal Mines. The RFI comment period had been scheduled to close on October 7, 2013...

  5. How alternative are alternative fuels?

    OpenAIRE

    Soffritti, Tiziana; Danielis, Romeo

    1998-01-01

    Could alternative fuel vehicles contribute to a substantial reduction of air pollution? Is there a market for alternative fuel vehicles? Could a market be created via a pollution tax? The article answers these questions on the basis of the available estimates.

  6. Optimal pre-scheduling of problem remappings

    Science.gov (United States)

    Nicol, David M.; Saltz, Joel H.

    1987-01-01

    A large class of scientific computational problems can be characterized as a sequence of steps where a significant amount of computation occurs each step, but the work performed at each step is not necessarily identical. Two good examples of this type of computation are: (1) regridding methods which change the problem discretization during the course of the computation, and (2) methods for solving sparse triangular systems of linear equations. Recent work has investigated a means of mapping such computations onto parallel processors; the method defines a family of static mappings with differing degrees of importance placed on the conflicting goals of good load balance and low communication/synchronization overhead. The performance tradeoffs are controllable by adjusting the parameters of the mapping method. To achieve good performance it may be necessary to dynamically change these parameters at run-time, but such changes can impose additional costs. If the computation's behavior can be determined prior to its execution, it can be possible to construct an optimal parameter schedule using a low-order-polynomial-time dynamic programming algorithm. Since the latter can be expensive, the performance is studied of the effect of a linear-time scheduling heuristic on one of the model problems, and it is shown to be effective and nearly optimal.

  7. Design Principles and Algorithms for Air Traffic Arrival Scheduling

    Science.gov (United States)

    Erzberger, Heinz; Itoh, Eri

    2014-01-01

    This report presents design principles and algorithms for building a real-time scheduler of arrival aircraft based on a first-come-first-served (FCFS) scheduling protocol. The algorithms provide the conceptual and computational foundation for the Traffic Management Advisor (TMA) of the Center/terminal radar approach control facilities (TRACON) automation system, which comprises a set of decision support tools for managing arrival traffic at major airports in the United States. The primary objective of the scheduler is to assign arrival aircraft to a favorable landing runway and schedule them to land at times that minimize delays. A further objective of the scheduler is to allocate delays between high-altitude airspace far away from the airport and low-altitude airspace near the airport. A method of delay allocation is described that minimizes the average operating cost in the presence of errors in controlling aircraft to a specified landing time. This report is a revision of an earlier paper first presented as part of an Advisory Group for Aerospace Research and Development (AGARD) lecture series in September 1995. The authors, during vigorous discussions over the details of this paper, felt it was important to the air-trafficmanagement (ATM) community to revise and extend the original 1995 paper, providing more detail and clarity and thereby allowing future researchers to understand this foundational work as the basis for the TMA's scheduling algorithms.

  8. Integrating Cache-Related Pre-emption Delays into Analysis of Fixed Priority Scheduling with Pre-emption Thresholds

    NARCIS (Netherlands)

    Bril, R.J.; Altmeyer, S.; van den Heuvel, M.H.P.; Davis, R.I.; Behnam, M.

    2014-01-01

    Cache-related pre-emption delays (CRPD) have been integrated into the schedulability analysis of sporadic tasks with constrained deadlines for fixed-priority pre-emptive scheduling (FPPS). This paper generalizes that work by integrating CRPD into the schedulability analysis of tasks with arbitrary

  9. Integrated scheduling of tasks and gynecologists to improve patient appointment scheduling : a case study

    NARCIS (Netherlands)

    van de Vrugt, Maartje; Luen-English, Samuel J.; Bastiaansen, W.A.P.; Kleinluchtenbeld, S.; Lardinois, W.T.P.; Pots, M.H.; Schoonbergen, D.H.; Hans, Erwin W.; Hurink, Johann L.; Boucherie, Richardus J.

    Like many hospital departments, the gynecology department of the Jeroen Bosch Hospital experienced difficulties with scheduling outpatient appointments at the medically preferred times. Despite the time invested in creating the schedule, the compliance of the achieved schedules with the preferences

  10. Dynamic scheduling and analysis of real time systems with multiprocessors

    Directory of Open Access Journals (Sweden)

    M.D. Nashid Anjum

    2016-08-01

    Full Text Available This research work considers a scenario of cloud computing job-shop scheduling problems. We consider m realtime jobs with various lengths and n machines with different computational speeds and costs. Each job has a deadline to be met, and the profit of processing a packet of a job differs from other jobs. Moreover, considered deadlines are either hard or soft and a penalty is applied if a deadline is missed where the penalty is considered as an exponential function of time. The scheduling problem has been formulated as a mixed integer non-linear programming problem whose objective is to maximize net-profit. The formulated problem is computationally hard and not solvable in deterministic polynomial time. This research work proposes an algorithm named the Tube-tap algorithm as a solution to this scheduling optimization problem. Extensive simulation shows that the proposed algorithm outperforms existing solutions in terms of maximizing net-profit and preserving deadlines.

  11. Work in the vicinity of the Ferney customs

    CERN Multimedia

    2005-01-01

    The Public Works and Housing Department of the Canton of Geneva and Geneva International Airport have scheduled large-scale work on the runway which passes over the Ferney tunnel. Although most of the work will be done at night, special traffic arrangements will be in force for the various phases of the work. The first phase of work will commence in mid-August and will last 14 weeks. The only change on the Route de Ferney will be that the lane reserved for taxis and buses will be closed. However, there will be single-lane alternating traffic on the Route Douanière, with traffic lights at the tunnel entrance. The second phase of work will start in November 2005. The traffic arrangements on the Route de Ferney will be the same, except that the lanes will be diverted laterally. There will continue to be single-lane alternating traffic on the Route Douanière. Three other phases of work are scheduled, lasting until June 2007.

  12. Project management with dynamic scheduling baseline scheduling, risk analysis and project control

    CERN Document Server

    Vanhoucke, Mario

    2013-01-01

    The topic of this book is known as dynamic scheduling, and is used to refer to three dimensions of project management and scheduling: the construction of a baseline schedule and the analysis of a project schedule's risk as preparation of the project control phase during project progress. This dynamic scheduling point of view implicitly assumes that the usability of a project's baseline schedule is rather limited and only acts as a point of reference in the project life cycle.

  13. Modelling a Nurse Shift Schedule with Multiple Preference Ranks for Shifts and Days-Off

    Directory of Open Access Journals (Sweden)

    Chun-Cheng Lin

    2014-01-01

    Full Text Available When it comes to nurse shift schedules, it is found that the nursing staff have diverse preferences about shift rotations and days-off. The previous studies only focused on the most preferred work shift and the number of satisfactory days-off of the schedule at the current schedule period but had few discussions on the previous schedule periods and other preference levels for shifts and days-off, which may affect fairness of shift schedules. As a result, this paper proposes a nurse scheduling model based upon integer programming that takes into account constraints of the schedule, different preference ranks towards each shift, and the historical data of previous schedule periods to maximize the satisfaction of all the nursing staff's preferences about the shift schedule. The main contribution of the proposed model is that we consider that the nursing staff’s satisfaction level is affected by multiple preference ranks and their priority ordering to be scheduled, so that the quality of the generated shift schedule is more reasonable. Numerical results show that the planned shifts and days-off are fair and successfully meet the preferences of all the nursing staff.

  14. Requested meals versus scheduled meals

    Directory of Open Access Journals (Sweden)

    Ciampolini M

    2012-04-01

    Full Text Available Mario CiampoliniPreventive Gastroenterology Unit, Department of Paediatrics, Università di Firenze, Florence, ItalyBackground: Scheduled meals are considered to be equivalent to those requested by the infant (null hypothesis. In adults, we have found high blood glucose before scheduled meals and low blood glucose after recognition of validated initial hunger. Low preprandial blood glucose is associated with a decrease in energy intake and body weight both in adults who are overtly overweight and in those who are of normal weight with insulin resistance (hidden overweight. In this study, we investigated the validity of the null hypothesis between scheduled and requested meals in 2-year-old infants with chronic nonspecific diarrhea.Methods: We trained a "recognizing request" meal pattern in 70 mother-infant pairs. The trained meal pattern consisted of administering food after a first request that we validated by blood glucose measurement in the hospital laboratory. Using a 7-day food diary, mothers reported preprandial blood glucose measurements for their infants three times a day. We assessed mean preprandial blood glucose, daily energy intake, days with diarrhea, blood parameters, and anthropometry before training and 4 months after training, and compared the results with measurements in 73 randomly selected untrained controls.Results: In the trained group, there was a decrease in mean blood glucose from 86.9 ± 9.4 mg/dL to 76.4 ± 6.7 mg/dL (P < 0.0001, as well as a decrease in energy intake and days with diarrhea in comparison with control infants who maintained scheduled meals. Only two of 21 infants who had a mean blood glucose lower than 81.2 mg/dL at recruitment showed a statistically significant decrease in mean blood glucose, whereas 36 of 49 infants above this cutoff level showed a statistically significant decrease after training (Chi-square test, P < 0.0001.Conclusion: Requested meals are associated with low preprandial blood

  15. Traditional and Alternative Approaches to the Method of Situational Analysis in Russia: Evidence from the Case Study “Istanbul in the Life and Works of Martiros Saryan”

    Directory of Open Access Journals (Sweden)

    Olga Fedotova

    2017-09-01

    Full Text Available The article analyzes the transformation of the methodological toolkit for teaching humanities and sciences in the Russian Federation. The method of case study, being widely spread in modern higher education research, is used as an example to illustrate the attempts to implement the best practices of foreign educational technology into tertiary academic process in Russia. The author provides some historical aspects of introducing case studies in modern teaching practice. The article features peculiarities of the Soviet approach to the structure of cases. Content analysis helps identify similarities and differences in Soviet/post-Soviet approaches to case study construction and brings into focus the problem points which reveal misinterpretation and/or misuse of didactic materials designated as cases. The approach suggested in the article implies presenting the content of a case study as a collection of documents related to a certain topic. The case study "Istanbul in the life and work of the artist Martiros Saryan" demonstrates that a case can have invariable and variable parts to reflect the specificity of the didactic task within the discipline. Such approach is expected to support students’ cognitive activity, develop creativity in searching additional sources and missing materials, improve efficiency of students’ autonomous work on solving complex problem solution.

  16. Inhalation Conscious Sedation with Nitrous Oxide and Oxygen as Alternative to General Anesthesia in Precooperative, Fearful, and Disabled Pediatric Dental Patients: A Large Survey on 688 Working Sessions

    Directory of Open Access Journals (Sweden)

    Angela Galeotti

    2016-01-01

    Full Text Available Aim. To evaluate the effectiveness and the tolerability of the nitrous oxide sedation for dental treatment on a large pediatric sample constituting precooperative, fearful, and disabled patients. Methods. 472 noncooperating patients (aged 4 to 17 were treated under conscious sedation. The following data were calculated: average age; gender distribution; success/failure; adverse effects; number of treatments; kind of dental procedure undertaken; number of dental procedures for each working session; number of working sessions for each patient; differences between males and females and between healthy and disabled patients in relation to success; success in relation to age; and level of cooperation using Venham score. Results. 688 conscious sedations were carried out. The success was 86.3%. Adverse effects occurred in 2.5%. 1317 dental procedures were performed. In relation to the success, there was a statistically significant difference between healthy and disabled patients. Sex and age were not significant factors for the success. Venham score was higher at the first contact with the dentist than during the treatment. Conclusions. Inhalation conscious sedation represented an effective and safe method to obtain cooperation, even in very young patients, and it could reduce the number of pediatric patients referred to hospitals for general anesthesia.

  17. FMDP reactor alternative summary report: Volume 4, Evolutionary LWR alternative

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1996-09-01

    Significant quantities of weapons-usable fissile materials [primarily plutonium and highly enriched uranium (HEU)] have become surplus to national defense needs both in the United States and Russia. These stocks of fissile materials pose significant dangers to national and international security. The dangers exist not only in the potential proliferation of nuclear weapons but also in the potential for environmental, safety, and health (ES&H) consequences if surplus fissile materials are not properly managed. The purpose of this report is to provide schedule, cost, and technical information that will be used to support the Record of Process (ROD). Following the screening process, DOE/MD via its national laboratories initiated a more detailed analysis activity to further evaluate each of the ten plutonium disposition alternatives that survived the screening process. Three ``Alternative Teams,`` chartered by DOE and comprised of technical experts from across the DOE national laboratory complex, conducted these analyses. One team was chartered for each of the major disposition classes (borehole, immobilization, and reactors). During the last year and a half, the Fissile Materials Disposition Program (FMDP) Reactor Alternative Team (RxAT) has conducted extensive analyses of the cost, schedule, technical maturity, S&S, and other characteristics of reactor-based plutonium disposition. The results of the RxAT`s analyses of the existing LWR, CANDU, and partially complete LWR alternatives are documented in Volumes 1-3 of this report. This document (Volume 4) summarizes the results of these analyses for the ELWR-based plutonium disposition option.

  18. FMDP reactor alternative summary report: Volume 4, Evolutionary LWR alternative

    International Nuclear Information System (INIS)

    1996-09-01

    Significant quantities of weapons-usable fissile materials [primarily plutonium and highly enriched uranium (HEU)] have become surplus to national defense needs both in the United States and Russia. These stocks of fissile materials pose significant dangers to national and international security. The dangers exist not only in the potential proliferation of nuclear weapons but also in the potential for environmental, safety, and health (ES ampersand H) consequences if surplus fissile materials are not properly managed. The purpose of this report is to provide schedule, cost, and technical information that will be used to support the Record of Process (ROD). Following the screening process, DOE/MD via its national laboratories initiated a more detailed analysis activity to further evaluate each of the ten plutonium disposition alternatives that survived the screening process. Three ''Alternative Teams,'' chartered by DOE and comprised of technical experts from across the DOE national laboratory complex, conducted these analyses. One team was chartered for each of the major disposition classes (borehole, immobilization, and reactors). During the last year and a half, the Fissile Materials Disposition Program (FMDP) Reactor Alternative Team (RxAT) has conducted extensive analyses of the cost, schedule, technical maturity, S ampersand S, and other characteristics of reactor-based plutonium disposition. The results of the RxAT's analyses of the existing LWR, CANDU, and partially complete LWR alternatives are documented in Volumes 1-3 of this report. This document (Volume 4) summarizes the results of these analyses for the ELWR-based plutonium disposition option

  19. An interpretation of schedule 1 of the Radioactive Substances Act 1993 and related issues

    International Nuclear Information System (INIS)

    Hill, M.; Wakerley, M.W.

    2000-09-01

    Schedule 1 of the UK's Radioactive Substances Act 1993 was originally Schedule 3 of the 1960 Act of the same name. It is possible that different methods are currently being employed to interpret how Schedule 1 should be used. This report provides an interpretation and guidance on this and related issues. It is primarily for technical specialists already familiar with the workings of the Act. This report covers the period 1999/2000

  20. Effects of Port Congestion in the Gate Control List Scheduling of Time Sensitive Networks

    OpenAIRE

    Kentis, Angelos Mimidis; Berger, Michael Stübert; Soler, José

    2017-01-01

    Time Sensitive Networking (TSN) can provide deterministic traffic behavior over Ethernet networks, for time sensitive traffic, whilst also bound the delay/jitter. To do so, the IEEE TSN working group introduced a network-wide transmission port scheduling mechanism. The duration of this schedule is directly related with the delay; hence reducing it can be beneficial within the TSN paradigm. This paper investigates the effects of port congestion, in the duration of the network wide schedule. A ...

  1. Toward Realistic Acquisition Schedule Estimates

    Science.gov (United States)

    2016-04-30

    through, for example, Program Evaluation and Review Technique, Critical Path Method and Gantt Charts (Blanchard & Fabrycky, 2006, esp. Chap. 11...million lines in the F-15E. Lines of code in the F-35 vary with source and date. A 2014 CRS report estimates F- 35 software as containing...set of tasks (e.g., PERT, Gantt Charts) 4 SCHEDULE EST. RELATIONSHIPS Some Candidate Explanatory Variables • Risk Reduction Efforts • Contract

  2. Environmental surveillance master sampling schedule

    International Nuclear Information System (INIS)

    Bisping, L.E.

    1995-02-01

    Environmental surveillance of the Hanford Site and surrounding areas is conducted by the Pacific Northwest Laboratory (PNL) for the U.S. Department of Energy (DOE). This document contains the planned 1994 schedules for routine collection of samples for the Surface Environmental Surveillance Project (SESP), Drinking Water Project, and Ground-Water Surveillance Project. Samples are routinely collected for the SESP and analyzed to determine the quality of air, surface water, soil, sediment, wildlife, vegetation, foodstuffs, and farm products at Hanford Site and surrounding communities. The responsibility for monitoring onsite drinking water falls outside the scope of the SESP. PNL conducts the drinking water monitoring project concurrent with the SESP to promote efficiency and consistency, utilize expertise developed over the years, and reduce costs associated with management, procedure development, data management, quality control, and reporting. The ground-water sampling schedule identifies ground-water sampling .events used by PNL for environmental surveillance of the Hanford Site. Sampling is indicated as annual, semi-annual, quarterly, or monthly in the sampling schedule. Some samples are collected and analyzed as part of ground-water monitoring and characterization programs at Hanford (e.g. Resources Conservation and Recovery Act (RCRA), Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA), or Operational). The number of samples planned by other programs are identified in the sampling schedule by a number in the analysis column and a project designation in the Cosample column. Well sampling events may be merged to avoid redundancy in cases where sampling is planned by both-environmental surveillance and another program

  3. Environmental surveillance master sampling schedule

    Energy Technology Data Exchange (ETDEWEB)

    Bisping, L.E.

    1995-02-01

    Environmental surveillance of the Hanford Site and surrounding areas is conducted by the Pacific Northwest Laboratory (PNL) for the U.S. Department of Energy (DOE). This document contains the planned 1994 schedules for routine collection of samples for the Surface Environmental Surveillance Project (SESP), Drinking Water Project, and Ground-Water Surveillance Project. Samples are routinely collected for the SESP and analyzed to determine the quality of air, surface water, soil, sediment, wildlife, vegetation, foodstuffs, and farm products at Hanford Site and surrounding communities. The responsibility for monitoring onsite drinking water falls outside the scope of the SESP. PNL conducts the drinking water monitoring project concurrent with the SESP to promote efficiency and consistency, utilize expertise developed over the years, and reduce costs associated with management, procedure development, data management, quality control, and reporting. The ground-water sampling schedule identifies ground-water sampling .events used by PNL for environmental surveillance of the Hanford Site. Sampling is indicated as annual, semi-annual, quarterly, or monthly in the sampling schedule. Some samples are collected and analyzed as part of ground-water monitoring and characterization programs at Hanford (e.g. Resources Conservation and Recovery Act (RCRA), Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA), or Operational). The number of samples planned by other programs are identified in the sampling schedule by a number in the analysis column and a project designation in the Cosample column. Well sampling events may be merged to avoid redundancy in cases where sampling is planned by both-environmental surveillance and another program.

  4. Environmental surveillance master sampling schedule

    Energy Technology Data Exchange (ETDEWEB)

    Bisping, L.E.

    1993-01-01

    Environmental surveillance of the Hanford Site and surrounding areas is conducted by the Pacific Northwest Laboratory (PNL) for the US Department of Energy (DOE). Samples are routinely collected and analyzed to determine the quality of air, surface water, ground water, soil, sediment, wildlife, vegetation, foodstuffs, and farm products at Hanford Site and surrounding communities. This document contains the planned schedule for routine sample collection for the Surface Environmental Surveillance Project (SESP) and Drinking Water Project, and Ground-Water Surveillance Project.

  5. Ada and cyclic runtime scheduling

    Science.gov (United States)

    Hood, Philip E.

    1986-01-01

    An important issue that must be faced while introducing Ada into the real time world is efficient and prodictable runtime behavior. One of the most effective methods employed during the traditional design of a real time system is the cyclic executive. The role cyclic scheduling might play in an Ada application in terms of currently available implementations and in terms of implementations that might be developed especially to support real time system development is examined. The cyclic executive solves many of the problems faced by real time designers, resulting in a system for which it is relatively easy to achieve approporiate timing behavior. Unfortunately a cyclic executive carries with it a very high maintenance penalty over the lifetime of the software that is schedules. Additionally, these cyclic systems tend to be quite fragil when any aspect of the system changes. The findings are presented of an ongoing SofTech investigation into Ada methods for real time system development. The topics covered include a description of the costs involved in using cyclic schedulers, the sources of these costs, and measures for future systems to avoid these costs without giving up the runtime performance of a cyclic system.

  6. Issues in Locomotive Crew Management and Scheduling

    Science.gov (United States)

    1990-11-01

    This study explores matters related to the scheduling and management of locomotive crews, particularly as they : might contribute to fatigue and stress. It describes how crews are scheduled currently, why there is so much : unpredictability in schedu...

  7. DME Prosthetics Orthotics, and Supplies Fee Schedule

    Data.gov (United States)

    U.S. Department of Health & Human Services — Durable Medical Equipment, Prosthetics-Orthotics, and Supplies Fee Schedule. The list contains the fee schedule amounts, floors, and ceilings for all procedure codes...

  8. Pittsburgh International Airport - Scheduled Passenger Traffic

    Data.gov (United States)

    Allegheny County / City of Pittsburgh / Western PA Regional Data Center — Attached is Pittsburgh International Airport’s Monthly Scheduled Traffic Report. This report contains a year-over-year (YOY) analysis of scheduled flights and...

  9. 46 CFR 525.2 - Terminal schedules.

    Science.gov (United States)

    2010-10-01

    ... their own negligence, or that impose upon others the obligation to indemnify or hold-harmless the terminals from liability for their own negligence. (2) Enforcement of terminal schedules. Any schedule that...

  10. GSA eLibrary Schedules and Contracts

    Data.gov (United States)

    General Services Administration — GSA eLibrary (formerly Schedules e-Library) is the online source for the latest contract award information for: GSA Schedules; Department of Veterans Affairs (VA)...

  11. Greenhouse-Gas Emissions and Abatement Costs of Nuclear, Fossil and Alternative Energy Options from a Life-Circle Perspective. Working paper

    International Nuclear Information System (INIS)

    Fritsche, U.R.

    2007-03-01

    As the issue of nuclear risks in its various forms - from radiation released during uranium mining to severe reactor accidents, and leakage from fuel reprocessing and repositories for spent fuel - is beyond the scope of this paper, we concentrate the following analysis on the more recent issues for which a scientifically reasonable range of data is available. In that respect, two arguments favouring nuclear electricity can be identified: It is allegedly free of CO2, and it is allegedly low cost. In this paper, we address both, presenting results of life-cycle cost and emission analyses of energy systems with respect to current technologies. We discuss the results with respect to other findings in the literature, and also indicate the cost-effectiveness of CO2 abatement in the electricity sector. The scientific work from which this paper draws was sponsored by a variety of sources, including the German Federal Ministry for Environment, Nature Protection, and Nuclear Safety (BMU), German Federal Ministry for Research and Education (BMBF), The Federal Environment Agency of Germany (UBA). (orig./GL)

  12. On the road to improved scheduling - fitting activities to capacity

    DEFF Research Database (Denmark)

    Lindhard, Søren Munch; Wandahl, Søren

    2012-01-01

    Last Planner System has through the sounding process increased the reliability of the schedule. The sound activities are moved to a buffer and afterwards selected to the Weekly Work Plans to match capacity. Therefore, in order to maximise productivity it is essential to ensure that the sounding p...

  13. Verification and Optimization of a PLC Control Schedule

    NARCIS (Netherlands)

    Brinksma, Hendrik; Mader, Angelika H.; Fehnker, Ansgar; Fehnker, Ansgar

    2002-01-01

    We report on the use of model checking techniques for both the verification of a process control program and the derivation of optimal control schedules. Most of this work has been carried out as part of a case study for the EU VHS project (Verification of Hybrid Systems), in which the program for a

  14. Heuristic algorithms for scheduling heat-treatment furnaces of steel ...

    Indian Academy of Sciences (India)

    on job-mixes in addition to the usual capacity and technical constraints associated with any industrial process. The benefits of effective scheduling of these batch processes include higher machine utilization, lower work-in-process (WIP) inventory, shorter cycle time, and greater customer satisfaction (Pinedo 1995). Recently ...

  15. Verification and Optimization of a PLC Control Schedule

    NARCIS (Netherlands)

    Brinksma, Hendrik; Mader, Angelika H.; Havelund, K.; Penix, J.; Visser, W.

    We report on the use of the SPIN model checker for both the verification of a process control program and the derivation of optimal control schedules. This work was carried out as part of a case study for the EC VHS project (Verification of Hybrid Systems), in which the program for a Programmable

  16. Scheduling Scholarship: Promoting Faculty Engagement in Two-Year Colleges

    Science.gov (United States)

    Lightner, Robin; Sipple, Susan

    2013-01-01

    Campuses can reinvigorate faculty by helping them make time for sustained, in-depth professional development. Scheduling scholarship in the form of on-going, long-term faculty learning communities (FLCs) link work in the classroom with research and reflection. The benefits of FLCs to two-year colleges include decreased isolation, intellectual…

  17. User’s guide to SNAP for ArcGIS® :ArcGIS interface for scheduling and network analysis program

    Science.gov (United States)

    Woodam Chung; Dennis Dykstra; Fred Bower; Stephen O’Brien; Richard Abt; John. and Sessions

    2012-01-01

    This document introduces a computer software named SNAP for ArcGIS® , which has been developed to streamline scheduling and transportation planning for timber harvest areas. Using modern optimization techniques, it can be used to spatially schedule timber harvest with consideration of harvesting costs, multiple products, alternative...

  18. 75 FR 7411 - Schedule of Water Charges

    Science.gov (United States)

    2010-02-19

    ... DELAWARE RIVER BASIN COMMISSION 18 CFR Part 410 Schedule of Water Charges AGENCY: Delaware River... Administrative Manual--Part III--Basin Regulations--Water Supply Charges to revise the schedule of water charges... commenter and the subject line ``Schedule of Water Charges.'' FOR FURTHER INFORMATION, CONTACT: Please...

  19. 40 CFR 141.702 - Sampling schedules.

    Science.gov (United States)

    2010-07-01

    ... serving at least 10,000 people must submit their sampling schedule for the initial round of source water... submitting the sampling schedule that EPA approves. (3) Systems serving fewer than 10,000 people must submit... analytical result for a scheduled sampling date due to equipment failure, loss of or damage to the sample...

  20. An improved scheduling algorithm for linear networks

    KAUST Repository

    Bader, Ahmed

    2017-02-09

    In accordance with the present disclosure, embodiments of an exemplary scheduling controller module or device implement an improved scheduling process such that the targeted reduction in schedule length can be achieve while incurring minimal energy penalty by allowing for a large rate (or duration) selection alphabet.

  1. 7 CFR 283.29 - Scheduling conference.

    Science.gov (United States)

    2010-01-01

    ... 7 Agriculture 4 2010-01-01 2010-01-01 false Scheduling conference. 283.29 Section 283.29... Procedure for Appeals of QC Claims of Less Than $50,000 § 283.29 Scheduling conference. (a) Time and place. The ALJ shall direct the parties or their counsel to attend a scheduling conference following the...

  2. Alternative Therapies

    Science.gov (United States)

    ... the widespread and erroneous belief that they are natural and do no harm, and because their use offers the opportunity for more control over treatment options and procedures. Alternative therapies can reduce stress, pain, and/or fatigue. Some therapies are covered ...

  3. Growing Alternatives

    DEFF Research Database (Denmark)

    Bagger-Petersen, Mai Corlin

    2014-01-01

    From 2014, Anhui Province will pilot a reform of the residential land market in China, thus integrating rural Anhui in the national housing market. In contrast, artist and activist Ou Ning has proposed the Bishan time money currency, intending to establish an alternative economic circuit in Bishan...

  4. Magnetostrictive Alternator

    Science.gov (United States)

    Dyson, Rodger; Bruder, Geoffrey

    2013-01-01

    This innovation replaces the linear alternator presently used in Stirling engines with a continuous-gradient, impedance-matched, oscillating magnetostrictive transducer that eliminates all moving parts via compression, maintains high efficiency, costs less to manufacture, reduces mass, and eliminates the need for a bearing system. The key components of this new technology are the use of stacked magnetostrictive materials, such as Terfenol-D, under a biased magnetic and stress-induced compression, continuous-gradient impedance-matching material, coils, force-focusing metallic structure, and supports. The acoustic energy from the engine travels through an impedancematching layer that is physically connected to the magnetostrictive mass. Compression bolts keep the structure under compressive strain, allowing for the micron-scale compression of the magnetostrictive material and eliminating the need for bearings. The relatively large millimeter displacement of the pressure side of the impedance-matching material is reduced to micron motion, and undergoes stress amplification at the magnetostrictive interface. The alternating compression and expansion of the magnetostrictive material creates an alternating magnetic field that then induces an electric current in a coil that is wound around the stack. This produces electrical power from the acoustic pressure wave and, if the resonant frequency is tuned to match the engine, can replace the linear alternator that is commonly used.

  5. A hybrid approach for minimizing makespan in permutation flowshop scheduling

    DEFF Research Database (Denmark)

    Govindan, Kannan; Balasundaram, R.; Baskar, N.

    2017-01-01

    This work proposes a hybrid approach for solving traditional flowshop scheduling problems to reduce the makespan (total completion time). To solve scheduling problems, a combination of Decision Tree (DT) and Scatter Search (SS) algorithms are used. Initially, the DT is used to generate a seed...... solution which is then given input to the SS to obtain optimal / near optimal solutions of makespan. The DT used the entropy function to convert the given problem into a tree structured format / set of rules. The SS provides an extensive investigation of the search space through diversification...

  6. Maternal Nutrition and Four-Alternative Choice

    Science.gov (United States)

    Davison, Michael; Krageloh, Christian U.; Fraser, Mhoyra; Breier, Bernhard H.

    2007-01-01

    Two groups of 10 male rats were trained to nose poke for food pellets at four alternatives that provided differing rates of pellet delivery on aperiodic schedules. After a fixed number of pellets had been delivered, 5, 10 or 20 in different conditions of the experiment, a 10-s blackout occurred, and the locations of the differing rates of pellet…

  7. Shift scheduling model considering workload and worker’s preference for security department

    Science.gov (United States)

    Herawati, A.; Yuniartha, D. R.; Purnama, I. L. I.; Dewi, LT

    2018-04-01

    Security department operates for 24 hours and applies shift scheduling to organize its workers as well as in hotel industry. This research has been conducted to develop shift scheduling model considering the workers physical workload using rating of perceived exertion (RPE) Borg’s Scale and workers’ preference to accommodate schedule flexibility. The mathematic model is developed in integer linear programming and results optimal solution for simple problem. Resulting shift schedule of the developed model has equally distribution shift allocation among workers to balance the physical workload and give flexibility for workers in working hours arrangement.

  8. The Effects of Varying Schedules of Incentive Delivery on Technical Training.

    Science.gov (United States)

    Pritchard, Robert D.; And Others

    The research reported here was initiated and designed to assess the impact of various schedules of incentive delivery (schedules of reinforcement) on performance and attitudes in an Air Force-related setting. Civilian subjects matching the characteristics of Air Force trainees were hired to work for four weeks, one week under each of four…

  9. A Metaheuristic Scheduler for Time Division Multiplexed Network-on-Chip

    DEFF Research Database (Denmark)

    Sørensen, Rasmus Bo; Sparsø, Jens; Pedersen, Mark Ruvald

    2014-01-01

    This paper presents a metaheuristic scheduler for inter-processor communication in multi-processor platforms using time division multiplexed (TDM) networks on chip (NOC). Compared to previous works, the scheduler handles a broader and more general class of platforms. Another contribution, which has...

  10. Scheduling Optimisations for SPIN to Minimise Buffer Requirements in Synchronous Data Flow

    NARCIS (Netherlands)

    Hartel, Pieter H.; Ruys, T.C.; Geilen, M.C.W.; Cimatti, A.; Jones, R.

    2008-01-01

    Synchronous Data flow (SDF) graphs have a simple and elegant semantics (essentially linear algebra) which makes SDF graphs eminently suitable as a vehicle for studying scheduling optimisations. We extend related work on using SPIN to experiment with scheduling optimisations aimed at minimising

  11. Optimal physicians schedule in an Intensive Care Unit

    Science.gov (United States)

    Hidri, L.; Labidi, M.

    2016-05-01

    In this paper, we consider a case study for the problem of physicians scheduling in an Intensive Care Unit (ICU). The objective is to minimize the total overtime under complex constraints. The considered ICU is composed of three buildings and the physicians are divided accordingly into six teams. The workload is assigned to each team under a set of constraints. The studied problem is composed of two simultaneous phases: composing teams and assigning the workload to each one of them. This constitutes an additional major hardness compared to the two phase's process: composing teams and after that assigning the workload. The physicians schedule in this ICU is used to be done manually each month. In this work, the studied physician scheduling problem is formulated as an integer linear program and solved optimally using state of the art software. The preliminary experimental results show that 50% of the overtime can be saved.

  12. Microgrid Reliability Modeling and Battery Scheduling Using Stochastic Linear Programming

    Energy Technology Data Exchange (ETDEWEB)

    Cardoso, Goncalo; Stadler, Michael; Siddiqui, Afzal; Marnay, Chris; DeForest, Nicholas; Barbosa-Povoa, Ana; Ferrao, Paulo

    2013-05-23

    This paper describes the introduction of stochastic linear programming into Operations DER-CAM, a tool used to obtain optimal operating schedules for a given microgrid under local economic and environmental conditions. This application follows previous work on optimal scheduling of a lithium-iron-phosphate battery given the output uncertainty of a 1 MW molten carbonate fuel cell. Both are in the Santa Rita Jail microgrid, located in Dublin, California. This fuel cell has proven unreliable, partially justifying the consideration of storage options. Several stochastic DER-CAM runs are executed to compare different scenarios to values obtained by a deterministic approach. Results indicate that using a stochastic approach provides a conservative yet more lucrative battery schedule. Lower expected energy bills result, given fuel cell outages, in potential savings exceeding 6percent.

  13. Analysis of Feeder Bus Network Design and Scheduling Problems

    Directory of Open Access Journals (Sweden)

    Mohammad Hadi Almasi

    2014-01-01

    Full Text Available A growing concern for public transit is its inability to shift passenger’s mode from private to public transport. In order to overcome this problem, a more developed feeder bus network and matched schedules will play important roles. The present paper aims to review some of the studies performed on Feeder Bus Network Design and Scheduling Problem (FNDSP based on three distinctive parts of the FNDSP setup, namely, problem description, problem characteristics, and solution approaches. The problems consist of different subproblems including data preparation, feeder bus network design, route generation, and feeder bus scheduling. Subsequently, descriptive analysis and classification of previous works are presented to highlight the main characteristics and solution methods. Finally, some of the issues and trends for future research are identified. This paper is targeted at dealing with the FNDSP to exhibit strategic and tactical goals and also contributes to the unification of the field which might be a useful complement to the few existing reviews.

  14. Research on a Queue Scheduling Algorithm in Wireless Communications Network

    Science.gov (United States)

    Yang, Wenchuan; Hu, Yuanmei; Zhou, Qiancai

    This paper proposes a protocol QS-CT, Queue Scheduling Mechanism based on Multiple Access in Ad hoc net work, which adds queue scheduling mechanism to RTS-CTS-DATA using multiple access protocol. By endowing different queues different scheduling mechanisms, it makes networks access to the channel much more fairly and effectively, and greatly enhances the performance. In order to observe the final performance of the network with QS-CT protocol, we simulate it and compare it with MACA/C-T without QS-CT protocol. Contrast to MACA/C-T, the simulation result shows that QS-CT has greatly improved the throughput, delay, rate of packets' loss and other key indicators.

  15. Analysis of feeder bus network design and scheduling problems.

    Science.gov (United States)

    Almasi, Mohammad Hadi; Mirzapour Mounes, Sina; Koting, Suhana; Karim, Mohamed Rehan

    2014-01-01

    A growing concern for public transit is its inability to shift passenger's mode from private to public transport. In order to overcome this problem, a more developed feeder bus network and matched schedules will play important roles. The present paper aims to review some of the studies performed on Feeder Bus Network Design and Scheduling Problem (FNDSP) based on three distinctive parts of the FNDSP setup, namely, problem description, problem characteristics, and solution approaches. The problems consist of different subproblems including data preparation, feeder bus network design, route generation, and feeder bus scheduling. Subsequently, descriptive analysis and classification of previous works are presented to highlight the main characteristics and solution methods. Finally, some of the issues and trends for future research are identified. This paper is targeted at dealing with the FNDSP to exhibit strategic and tactical goals and also contributes to the unification of the field which might be a useful complement to the few existing reviews.

  16. Opportunistic splitting for scheduling using a score-based approach

    KAUST Repository

    Rashid, Faraan

    2012-06-01

    We consider the problem of scheduling a user in a multi-user wireless environment in a distributed manner. The opportunistic splitting algorithm is applied to find the best group of users without reporting the channel state information to the centralized scheduler. The users find the best among themselves while requiring just a ternary feedback from the common receiver at the end of each mini-slot. The original splitting algorithm is modified to handle users with asymmetric channel conditions. We use a score-based approach with the splitting algorithm to introduce time and throughput fairness while exploiting the multi-user diversity of the network. Analytical and simulation results are given to show that the modified score-based splitting algorithm works well as a fair scheduling scheme with good spectral efficiency and reduced feedback. © 2012 IEEE.

  17. GENETIC ALGORITHM APPLICATION FOR MULTI-CRITERIA SCHEDULING PROBLEM

    Directory of Open Access Journals (Sweden)

    I. V. Arkhipov

    2015-05-01

    Full Text Available The paper describes mathematical model and method of task solution for defining an enterprise work performance schedule. Two-stage feedstock processing is supposed to exist at the enterprise. At the first stage the sawing process into semimanufactured products is done. The second stage (finished products manufacturing stage includes durable processing of obtained semimanufactured products at one of the interchangeable work centers. The sawing process into semimanufactured products is carried out according to a plan, developed in advance and in compliance with technological charts. Scheduling consists of separate cutting calculation and planning of all feedstock cutting with the aim of the most effective specification task performance based on available reserves. Following the cutting plan, an enterprise work performance schedule is created. This schedule consists of the cutting sequence with volume, start and end time, and plan for loading of after-treatment. The solution to this problem becomes more involved due to the necessity of taking into account all features, limitations and parameters of process equipment, as well as of raw material and production orders. Special method based on genetic algorithm has been proposed for handling the problem. The algorithm has been tested on several different realproduction plans. Its efficiency estimation is given. The software systemimplemented on the proposed algorithm has been tested on real operating data of several sawmills. Reduction of machine idle time and incomplete production decrease has been confirmed by the enterprise specialists.

  18. Prediction Based Proactive Thermal Virtual Machine Scheduling in Green Clouds

    Science.gov (United States)

    Kinger, Supriya; Kumar, Rajesh; Sharma, Anju

    2014-01-01

    Cloud computing has rapidly emerged as a widely accepted computing paradigm, but the research on Cloud computing is still at an early stage. Cloud computing provides many advanced features but it still has some shortcomings such as relatively high operating cost and environmental hazards like increasing carbon footprints. These hazards can be reduced up to some extent by efficient scheduling of Cloud resources. Working temperature on which a machine is currently running can be taken as a criterion for Virtual Machine (VM) scheduling. This paper proposes a new proactive technique that considers current and maximum threshold temperature of Server Machines (SMs) before making scheduling decisions with the help of a temperature predictor, so that maximum temperature is never reached. Different workload scenarios have been taken into consideration. The results obtained show that the proposed system is better than existing systems of VM scheduling, which does not consider current temperature of nodes before making scheduling decisions. Thus, a reduction in need of cooling systems for a Cloud environment has been obtained and validated. PMID:24737962

  19. Weirton Steel Corporation logistics and integrated scheduling. Final report

    Energy Technology Data Exchange (ETDEWEB)

    Guzzetta, M.B. [comp.

    1996-06-01

    In order to remain competitive in the changing steel market, US steel producers restructured by taking on foreign and domestic partners, closing facilities and/or trimming work forces, and modernizing their steel making facilities. However, very little was done to develop production management technology to complement these changes. The Logistics and Integrated Scheduling program (LIS) was undertaken to address this issue. LIS is an information management system that delivers better customer service, better quality materials, and a just-in-time delivery system. It involves three major components: (1) material marking and sensing: advanced R&D applied to determining cost effective, feasible solutions to passive inventory; (2) material inventory and tracking: advanced technology applied to managing inventory movement; (3) planning and scheduling: beginning with annual production plans, order management, and operational constraints, the ability to build integrated schedules capable of pull through and push through scheduling for various plant capability levels and location configurations with rapid turnaround capability. LIS provides accurate, automated tracking of material flows throughout the mill, the collection and analysis of production data, and automated schedule optimization.

  20. Scheduling multirobot operations in manufacturing by truncated Petri nets

    Science.gov (United States)

    Chen, Qin; Luh, J. Y.

    1995-08-01

    Scheduling of operational sequences in manufacturing processes is one of the important problems in automation. Methods of applying Petri nets to model and analyze the problem with constraints on precedence relations, multiple resources allocation, etc. have been available in literature. Searching for an optimum schedule can be implemented by combining the branch-and-bound technique with the execution of the timed Petri net. The process usually produces a large Petri net which is practically not manageable. This disadvantage, however, can be handled by a truncation technique which divides the original large Petri net into several smaller size subnets. The complexity involved in the analysis of each subnet individually is greatly reduced. However, when the locally optimum schedules of the resulting subnets are combined together, it may not yield an overall optimum schedule for the original Petri net. To circumvent this problem, algorithms are developed based on the concepts of Petri net execution and modified branch-and-bound process. The developed technique is applied to a multi-robot task scheduling problem of the manufacturing work cell.

  1. Prediction Based Proactive Thermal Virtual Machine Scheduling in Green Clouds

    Directory of Open Access Journals (Sweden)

    Supriya Kinger

    2014-01-01

    Full Text Available Cloud computing has rapidly emerged as a widely accepted computing paradigm, but the research on Cloud computing is still at an early stage. Cloud computing provides many advanced features but it still has some shortcomings such as relatively high operating cost and environmental hazards like increasing carbon footprints. These hazards can be reduced up to some extent by efficient scheduling of Cloud resources. Working temperature on which a machine is currently running can be taken as a criterion for Virtual Machine (VM scheduling. This paper proposes a new proactive technique that considers current and maximum threshold temperature of Server Machines (SMs before making scheduling decisions with the help of a temperature predictor, so that maximum temperature is never reached. Different workload scenarios have been taken into consideration. The results obtained show that the proposed system is better than existing systems of VM scheduling, which does not consider current temperature of nodes before making scheduling decisions. Thus, a reduction in need of cooling systems for a Cloud environment has been obtained and validated.

  2. Prediction based proactive thermal virtual machine scheduling in green clouds.

    Science.gov (United States)

    Kinger, Supriya; Kumar, Rajesh; Sharma, Anju

    2014-01-01

    Cloud computing has rapidly emerged as a widely accepted computing paradigm, but the research on Cloud computing is still at an early stage. Cloud computing provides many advanced features but it still has some shortcomings such as relatively high operating cost and environmental hazards like increasing carbon footprints. These hazards can be reduced up to some extent by efficient scheduling of Cloud resources. Working temperature on which a machine is currently running can be taken as a criterion for Virtual Machine (VM) scheduling. This paper proposes a new proactive technique that considers current and maximum threshold temperature of Server Machines (SMs) before making scheduling decisions with the help of a temperature predictor, so that maximum temperature is never reached. Different workload scenarios have been taken into consideration. The results obtained show that the proposed system is better than existing systems of VM scheduling, which does not consider current temperature of nodes before making scheduling decisions. Thus, a reduction in need of cooling systems for a Cloud environment has been obtained and validated.

  3. A System for Automatically Generating Scheduling Heuristics

    Science.gov (United States)

    Morris, Robert

    1996-01-01

    The goal of this research is to improve the performance of automated schedulers by designing and implementing an algorithm by automatically generating heuristics by selecting a schedule. The particular application selected by applying this method solves the problem of scheduling telescope observations, and is called the Associate Principal Astronomer. The input to the APA scheduler is a set of observation requests submitted by one or more astronomers. Each observation request specifies an observation program as well as scheduling constraints and preferences associated with the program. The scheduler employs greedy heuristic search to synthesize a schedule that satisfies all hard constraints of the domain and achieves a good score with respect to soft constraints expressed as an objective function established by an astronomer-user.

  4. Environmental surveillance master sampling schedule

    International Nuclear Information System (INIS)

    Bisping, L.E.

    1994-02-01

    This document contains the planned 1994 schedules for routine collection of samples for the Surface Environmental Surveillance Project (SESP), Drinking Water Project, and Ground-Water Surveillance Project. Samples are routinely collected for the SESP and analyzed to determine the quality of air, surface water, soil, sediment, wildlife, vegetation, foodstuffs, and farm products at Hanford Site and surrounding communities. The responsibility for monitoring the onsite drinking water falls outside the scope of the SESP. The Hanford Environmental Health Foundation is responsible for monitoring the nonradiological parameters as defined in the National Drinking Water Standards while PNL conducts the radiological monitoring of the onsite drinking water. PNL conducts the drinking water monitoring project concurrent with the SESP to promote efficiency and consistency, utilize the expertise developed over the years, and reduce costs associated with management, procedure development, data management, quality control and reporting. The ground-water sampling schedule identifies ground-water sampling events used by PNL for environmental surveillance of the Hanford Site

  5. Broadcast scheduling with data bundles

    Science.gov (United States)

    Chen, Fangfei; Pizzocaro, Diego; Johnson, Matthew P.; Bar-Noy, Amotz; Preece, Alun; La Porta, Thomas

    2011-06-01

    Broadcast scheduling has been extensively studied in wireless environments, where a base station broadcasts data to multiple users. Due to the sole wireless channel's limited bandwidth, only a subset of the needs may be satisfiable, and so maximizing total (weighted) throughput is a popular objective. In many realistic applications, however, data are dependent or correlated in the sense that the joint utility of a set of items is not simply the sum of their individual utilities. On the one hand, substitute data may provide overlapping information, so one piece of data item may have lower value if a second data item has already been delivered; on the other hand, complementary data are more valuable than the sum of their parts, if, for example, one data item is only useful in the presence of a second data item. In this paper, we define a data bundle to be a set of data items with possibly nonadditive joint utility, and we study a resulting broadcast scheduling optimization problem whose objective is to maximize the utility provided by the data delivered.

  6. Environmental surveillance master sampling schedule

    Energy Technology Data Exchange (ETDEWEB)

    Bisping, L.E.

    1994-02-01

    This document contains the planned 1994 schedules for routine collection of samples for the Surface Environmental Surveillance Project (SESP), Drinking Water Project, and Ground-Water Surveillance Project. Samples are routinely collected for the SESP and analyzed to determine the quality of air, surface water, soil, sediment, wildlife, vegetation, foodstuffs, and farm products at Hanford Site and surrounding communities. The responsibility for monitoring the onsite drinking water falls outside the scope of the SESP. The Hanford Environmental Health Foundation is responsible for monitoring the nonradiological parameters as defined in the National Drinking Water Standards while PNL conducts the radiological monitoring of the onsite drinking water. PNL conducts the drinking water monitoring project concurrent with the SESP to promote efficiency and consistency, utilize the expertise developed over the years, and reduce costs associated with management, procedure development, data management, quality control and reporting. The ground-water sampling schedule identifies ground-water sampling events used by PNL for environmental surveillance of the Hanford Site.

  7. White Paper on studying the safety of the childhood immunization schedule in the Vaccine Safety Datalink.

    Science.gov (United States)

    Glanz, Jason M; Newcomer, Sophia R; Jackson, Michael L; Omer, Saad B; Bednarczyk, Robert A; Shoup, Jo Ann; DeStefano, Frank; Daley, Matthew F

    2016-02-15

    While the large majority of parents in the U.S. vaccinate their children according to the recommended immunization schedule, some parents have refused or delayed vaccinating, often citing safety concerns. In response to public concern, the U.S. Institute of Medicine (IOM) evaluated existing research regarding the safety of the recommended immunization schedule. The IOM concluded that although available evidence strongly supported the safety of the currently recommended schedule as a whole, additional observational research was warranted to compare health outcomes between fully vaccinated children and those on a delayed or alternative schedule. In addition, the IOM identified the Vaccine Safety Datalink (VSD) as an important resource for conducting this research. Guided by the IOM findings, the Centers for Disease Control and Prevention (CDC) commissioned a White Paper to assess how the VSD could be used to study the safety of the childhood immunization schedule. Guided by subject matter expert engagement, the resulting White Paper outlines a 4 stage approach for identifying exposure groups of undervaccinated children, presents a list of health outcomes of highest priority to examine in this context, and describes various study designs and statistical methods that could be used to analyze the safety of the schedule. While it appears feasible to study the safety of the recommended immunization schedule in settings such as the VSD, these studies will be inherently complex, and as with all observational studies, will need to carefully address issues of confounding and bias. In light of these considerations, decisions about conducting studies of the safety of the schedule will also need to assess epidemiological evidence of potential adverse events that could be related to the schedule, the biological plausibility of an association between an adverse event and the schedule, and public concern about the safety of the schedule. Copyright © 2015 Elsevier Ltd. All rights

  8. Standardization of Alternative Fuels. Phase 2

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2004-08-15

    March 2003 the Executive Committee of the International Energy Agency's Implementing Agreement on Advanced Motor fuels (IEA/AMF) decided to continue annex XXVII 'Standardization of alternative fuels' with a second phase. The purpose of the second phase was to go further in the contacts with the International Organization for Standardization (ISO) as well as the European Committee for Standardization (CEN) and their technical committees, to better understand their needs and to investigate how IEA/AMF could contribute to their work. It was also scheduled to put forward proposals on how IEA/AMF could cooperate with CEN and ISO and their technical committees (TC: s), primarily ISO/TC 28 'Petroleum Products and Lubricants' and CEN/TC 19 'Petroleum Products, Lubricants and Related Products'. The main part of the work in IEA/AMF annex XXVII phase two has focused on personal contacts within CEN/TC 19 and ISO/TC 28, but also on data and information collection from websites and written information. Together with the analysis of this information, the internal organization of a cooperation between IEA/AMF and ISO/TC 28 and of a cooperation between IEA/AMF and CEN/TC 19 have also been discussed and analysed.

  9. Ear Infection Treatment: Do Alternative Therapies Work?

    Science.gov (United States)

    ... in books and magazines. They include chiropractic adjustments, homeopathy, herbal eardrops and others. Perhaps you're seeking ... infection treatments have been studied with mixed results. Homeopathy. A controversial treatment for ear infection, homeopathy involves ...

  10. Alternative detente

    International Nuclear Information System (INIS)

    Soper, K.; Ryle, M.

    1988-01-01

    The influence of the Chernobyl accident on the disarmament and anti-nuclear movements is discussed. The accident directed attention towards the areas in common rather than the areas of disagreement. It also demonstrated the environmental impact of radioactivity, strengthening the ecological case of the anti-nuclear movement. The issues are discussed for the Western and Eastern bloc countries and the relationship between the two. Sections focus on the Eco-protest, Green politics and economics and on the politics of minority protest and the Green alternative. (U.K.)

  11. Joint optimization of production scheduling and machine group preventive maintenance

    International Nuclear Information System (INIS)

    Xiao, Lei; Song, Sanling; Chen, Xiaohui; Coit, David W.

    2016-01-01

    Joint optimization models were developed combining group preventive maintenance of a series system and production scheduling. In this paper, we propose a joint optimization model to minimize the total cost including production cost, preventive maintenance cost, minimal repair cost for unexpected failures and tardiness cost. The total cost depends on both the production process and the machine maintenance plan associated with reliability. For the problems addressed in this research, any machine unavailability leads to system downtime. Therefore, it is important to optimize the preventive maintenance of machines because their performance impacts the collective production processing associated with all machines. Too lengthy preventive maintenance intervals may be associated with low scheduled machine maintenance cost, but may incur expensive costs for unplanned failure due to low machine reliability. Alternatively, too frequent preventive maintenance activities may achieve the desired high reliability machines, but unacceptably high scheduled maintenance cost. Additionally, product scheduling plans affect tardiness and maintenance cost. Two results are obtained when solving the problem; the optimal group preventive maintenance interval for machines, and the assignment of each job, including the corresponding start time and completion time. To solve this non-deterministic polynomial-time problem, random keys genetic algorithms are used, and a numerical example is solved to illustrate the proposed model. - Highlights: • Group preventive maintenance (PM) planning and production scheduling are jointed. • Maintenance interval and assignment of jobs are decided by minimizing total cost. • Relationships among system age, PM, job processing time are quantified. • Random keys genetic algorithms (GA) are used to solve the NP-hard problem. • Random keys GA and Particle Swarm Optimization (PSO) are compared.

  12. Voltage scheduling for low power/energy

    Science.gov (United States)

    Manzak, Ali

    2001-07-01

    Power considerations have become an increasingly dominant factor in the design of both portable and desk-top systems. An effective way to reduce power consumption is to lower the supply voltage since voltage is quadratically related to power. This dissertation considers the problem of lowering the supply voltage at (i) the system level and at (ii) the behavioral level. At the system level, the voltage of the variable voltage processor is dynamically changed with the work load. Processors with limited sized buffers as well as those with very large buffers are considered. Given the task arrival times, deadline times, execution times, periods and switching activities, task scheduling algorithms that minimize energy or peak power are developed for the processors equipped with very large buffers. A relation between the operating voltages of the tasks for minimum energy/power is determined using the Lagrange multiplier method, and an iterative algorithm that utilizes this relation is developed. Experimental results show that the voltage assignment obtained by the proposed algorithm is very close (0.1% error) to that of the optimal energy assignment and the optimal peak power (1% error) assignment. Next, on-line and off-fine minimum energy task scheduling algorithms are developed for processors with limited sized buffers. These algorithms have polynomial time complexity and present optimal (off-line) and close-to-optimal (on-line) solutions. A procedure to calculate the minimum buffer size given information about the size of the task (maximum, minimum), execution time (best case, worst case) and deadlines is also presented. At the behavioral level, resources operating at multiple voltages are used to minimize power while maintaining the throughput. Such a scheme has the advantage of allowing modules on the critical paths to be assigned to the highest voltage levels (thus meeting the required timing constraints) while allowing modules on non-critical paths to be assigned

  13. A Formal Product-Line Engineering Approach for Schedulers

    NARCIS (Netherlands)

    Orhan, Güner; Aksit, Mehmet; Rensink, Arend; Jololian, Leon; Robbins, David E.; Fernandes, Steven L.

    2017-01-01

    Scheduling techniques have been applied to a large category of software systems, such as, processor scheduling in operating systems, car scheduling in elevator systems, facility scheduling at airports, antenna scheduling in radar systems, scheduling of events, control signals and data in

  14. The CHI 2013 interactive schedule

    DEFF Research Database (Denmark)

    Satyanarayan, Arvind; Strazzulla, Daniel; Klokmose, Clemens Nylandsted

    2013-01-01

    CHI 2013 offers over 500 separate events including paper presentations, panels, courses, case studies and special interest groups. Given the size of the conference, it is no longer practical to host live summaries of these events. Instead, a 30-second Video Preview summary of each event is availa......CHI 2013 offers over 500 separate events including paper presentations, panels, courses, case studies and special interest groups. Given the size of the conference, it is no longer practical to host live summaries of these events. Instead, a 30-second Video Preview summary of each event...... is available. The CHI'13 Interactive Schedule helps attendees navigate this wealth of video content in order to identify events they would like to attend. It consists of a number of large display screens throughout the conference venue which cycle through a video playlist of events. Attendees can interact...

  15. The ASDEX Upgrade discharge schedule

    International Nuclear Information System (INIS)

    Neu, G.; Engelhardt, K.; Raupp, G.; Treutterer, W.; Zasche, D.; Zehetbauer, T.

    2007-01-01

    ASDEX Upgrade's recently commissioned discharge control system (DCS) marks the transition from a traditional programmed system to a highly flexible 'data driven' one. The allocation of application processes (APs) to controllers, the interconnection of APs through uniquely named signals, and AP control parameter values are all defined as data, and can easily be adapted to the requirements of a particular discharge. The data is laid down in a set of XML documents which APs request via HTTP from a configuration server before a discharge. The use of XML allows for easy parsing, and structural validation through (XSD) schemas. The central input to the configuration process is the discharge schedule (DS), which embodies the dynamic behaviour of a planned discharge as reference trajectories grouped in segments, concatenated through transition conditions. Editing, generation and validation tools, and version control through CVS allow for efficient management of DSs

  16. The delivery commitment schedule process

    International Nuclear Information System (INIS)

    Vance, S.A.

    1991-01-01

    The Standard Contract for the Disposal of Spent Nuclear Fuel (SNF) and/or High-Level Radioactive Waste (HLW) (herein referred to as the Contract) tasked the U.S. Department of Energy (DOE) with the development of a transportation system adequate to service both utilities and the waste management system (WMS). Due to the nature of the Contract, this development must take place prior to the utilities' final determination of the specific SNF that they will deliver during each allocation period. The Delivery Commitment Schedule (DCS) process is designed to initiate the identification of the SNF that will be delivered at a given time in order to aid in the development of the transportation system

  17. Environmental surveillance master sampling schedule

    Energy Technology Data Exchange (ETDEWEB)

    Bisping, L E

    1992-01-01

    Environmental surveillance of the Hanford Site and surrounding areas is conducted by the Pacific Northwest Laboratory (PNL) for the US Department of Energy (DOE). This document contains the planned schedule for routine sample collection for the Surface Environmental Surveillance Project (SESP) and Ground-Water Monitoring Project. Samples for radiological analyses include Air-Particulate Filter, gases and vapor; Water/Columbia River, Onsite Pond, Spring, Irrigation, and Drinking; Foodstuffs/Animal Products including Whole Milk, Poultry and Eggs, and Beef; Foodstuffs/Produce including Leafy Vegetables, Vegetables, and Fruit; Foodstuffs/Farm Products including Wine, Wheat and Alfalfa; Wildlife; Soil; Vegetation; and Sediment. Direct Radiation Measurements include Terrestrial Locations, Columbia River Shoreline Locations, and Onsite Roadway, Railway and Aerial, Radiation Surveys.

  18. Optimization of Hierarchically Scheduled Heterogeneous Embedded Systems

    DEFF Research Database (Denmark)

    Pop, Traian; Pop, Paul; Eles, Petru

    2005-01-01

    We present an approach to the analysis and optimization of heterogeneous distributed embedded systems. The systems are heterogeneous not only in terms of hardware components, but also in terms of communication protocols and scheduling policies. When several scheduling policies share a resource......, they are organized in a hierarchy. In this paper, we address design problems that are characteristic to such hierarchically scheduled systems: assignment of scheduling policies to tasks, mapping of tasks to hardware components, and the scheduling of the activities. We present algorithms for solving these problems....... Our heuristics are able to find schedulable implementations under limited resources, achieving an efficient utilization of the system. The developed algorithms are evaluated using extensive experiments and a real-life example....

  19. Planning and Scheduling of Airline Operations

    Directory of Open Access Journals (Sweden)

    İlkay ORHAN

    2010-02-01

    Full Text Available The Turkish Civil Aviation sector has grown at a rate of 53 % between the years 2002-2008 owing to countrywide economical developments and some removed restrictions in the aviation field. Successful international companies in the sector use advanced computer-supported solution methods for their planning and scheduling problems. These methods have been providing significant competitive advantages to those companies. There are four major scheduling and planning problems in the airline sector: flight scheduling, aircraft scheduling, crew scheduling and disruptions management. These aforementioned scheduling and planning problems faced by all airline companies in the airline sector were examined in detail. Studies reveal that companies using the advanced methods might gain significant cost reductions. However, even then, the time required for solving large scale problems may not satisfy the decision quality desired by decision makers. In such cases, using modern decision methods integrated with advanced technologies offer companies an opportunity for significant cost-advantages.

  20. Spent nuclear fuel project integrated schedule plan

    International Nuclear Information System (INIS)

    Squires, K.G.

    1995-01-01

    The Spent Nuclear Fuel Integrated Schedule Plan establishes the organizational responsibilities, rules for developing, maintain and status of the SNF integrated schedule, and an implementation plan for the integrated schedule. The mission of the SNFP on the Hanford site is to provide safe, economic, environmentally sound management of Hanford SNF in a manner which stages it to final disposition. This particularly involves K Basin fuel

  1. A Group Theoretic Tabu Search Methodology for Solving the Theater Distribution Vehicle Routing and Scheduling Problem

    National Research Council Canada - National Science Library

    Crino, John

    2002-01-01

    .... This dissertation applies and extends some of Colletti's (1999) seminal work in group theory and metaheuristics in order to solve the theater distribution vehicle routing and scheduling problem (TDVRSP...

  2. Energy-aware stochastic scheduler for batch of precedence-constrained jobs on heterogeneous computing system

    International Nuclear Information System (INIS)

    Sajid, Mohammad; Raza, Zahid

    2017-01-01

    The problem of optimal scheduling of precedence-constrained jobs as well as finding the Pareto-optimal sets for multi objective scheduling problem have been proven to be nondeterministic polynomial time (NP)-complete. The growing consumption of energy has compelled the researchers to consider energy consumption as an important parameter along with other parameters in multi-objective scheduling problem. Accordingly, many energy-aware precedence-constraints scheduling algorithms have been reported in the literature. Most of the algorithms have a limitation of treating this problem as a single objective optimization problem modelling with deterministic execution times rather than stochastic execution times. This work proposes energy-aware stochastic scheduler to schedule the batch of precedence-constrained jobs on dynamic voltage frequency scaling-enabled processors in order to optimize the energy consumption and the turnaround time. The execution and inter-communication times are stochastic which are drawn from independent probability distributions. A novel encoding for batch of precedence-constrained jobs, stochastic turnaround time and energy models are also proposed. Experimental results show that, compared with other algorithms, the proposed scheduler offers reduced turnaround time and reduced energy consumption. - Highlights: • This paper reports stochastic scheduler for energy management of data centres. • Novel encoding, turnaround time and energy consumption models are proposed. • Clark's equations are used to compute the turnaround time and energy consumption. • The proposed scheduler offers reduced turnaround time as well as energy consumption.

  3. Placental perfusion - a human alternative

    DEFF Research Database (Denmark)

    Mose, Tina; Knudsen, Lisbeth E

    2006-01-01

    and represents a supplement and alternative to animal testing, bypassing the animal to human extrapolation. Placentas are readily obtainable from most births upon informed consent from the mothers and are considered a promising tissue alternative/supplement to animal experiments. The system is validated...... as a part of work package 2 of the integrated project ReProTect....

  4. Taking the lag out of jet lag through model-based schedule design.

    Science.gov (United States)

    Dean, Dennis A; Forger, Daniel B; Klerman, Elizabeth B

    2009-06-01

    Travel across multiple time zones results in desynchronization of environmental time cues and the sleep-wake schedule from their normal phase relationships with the endogenous circadian system. Circadian misalignment can result in poor neurobehavioral performance, decreased sleep efficiency, and inappropriately timed physiological signals including gastrointestinal activity and hormone release. Frequent and repeated transmeridian travel is associated with long-term cognitive deficits, and rodents experimentally exposed to repeated schedule shifts have increased death rates. One approach to reduce the short-term circadian, sleep-wake, and performance problems is to use mathematical models of the circadian pacemaker to design countermeasures that rapidly shift the circadian pacemaker to align with the new schedule. In this paper, the use of mathematical models to design sleep-wake and countermeasure schedules for improved performance is demonstrated. We present an approach to designing interventions that combines an algorithm for optimal placement of countermeasures with a novel mode of schedule representation. With these methods, rapid circadian resynchrony and the resulting improvement in neurobehavioral performance can be quickly achieved even after moderate to large shifts in the sleep-wake schedule. The key schedule design inputs are endogenous circadian period length, desired sleep-wake schedule, length of intervention, background light level, and countermeasure strength. The new schedule representation facilitates schedule design, simulation studies, and experiment design and significantly decreases the amount of time to design an appropriate intervention. The method presented in this paper has direct implications for designing jet lag, shift-work, and non-24-hour schedules, including scheduling for extreme environments, such as in space, undersea, or in polar regions.

  5. Taking the lag out of jet lag through model-based schedule design.

    Directory of Open Access Journals (Sweden)

    Dennis A Dean

    2009-06-01

    Full Text Available Travel across multiple time zones results in desynchronization of environmental time cues and the sleep-wake schedule from their normal phase relationships with the endogenous circadian system. Circadian misalignment can result in poor neurobehavioral performance, decreased sleep efficiency, and inappropriately timed physiological signals including gastrointestinal activity and hormone release. Frequent and repeated transmeridian travel is associated with long-term cognitive deficits, and rodents experimentally exposed to repeated schedule shifts have increased death rates. One approach to reduce the short-term circadian, sleep-wake, and performance problems is to use mathematical models of the circadian pacemaker to design countermeasures that rapidly shift the circadian pacemaker to align with the new schedule. In this paper, the use of mathematical models to design sleep-wake and countermeasure schedules for improved performance is demonstrated. We present an approach to designing interventions that combines an algorithm for optimal placement of countermeasures with a novel mode of schedule representation. With these methods, rapid circadian resynchrony and the resulting improvement in neurobehavioral performance can be quickly achieved even after moderate to large shifts in the sleep-wake schedule. The key schedule design inputs are endogenous circadian period length, desired sleep-wake schedule, length of intervention, background light level, and countermeasure strength. The new schedule representation facilitates schedule design, simulation studies, and experiment design and significantly decreases the amount of time to design an appropriate intervention. The method presented in this paper has direct implications for designing jet lag, shift-work, and non-24-hour schedules, including scheduling for extreme environments, such as in space, undersea, or in polar regions.

  6. A customizable, scalable scheduling and reporting system.

    Science.gov (United States)

    Wood, Jody L; Whitman, Beverly J; Mackley, Lisa A; Armstrong, Robert; Shotto, Robert T

    2014-06-01

    Scheduling is essential for running a facility smoothly and for summarizing activities in use reports. The Penn State Hershey Clinical Simulation Center has developed a scheduling interface that uses off-the-shelf components, with customizations that adapt to each institution's data collection and reporting needs. The system is designed using programs within the Microsoft Office 2010 suite. Outlook provides the scheduling component, while the reporting is performed using Access or Excel. An account with a calendar is created for the main schedule, with separate resource accounts created for each room within the center. The Outlook appointment form's 2 default tabs are used, in addition to a customized third tab. The data are then copied from the calendar into either a database table or a spreadsheet, where the reports are generated.Incorporating this system into an institution-wide structure allows integration of personnel lists and potentially enables all users to check the schedule from their desktop. Outlook also has a Web-based application for viewing the basic schedule from outside the institution, although customized data cannot be accessed. The scheduling and reporting functions have been used for a year at the Penn State Hershey Clinical Simulation Center. The schedule has increased workflow efficiency, improved the quality of recorded information, and provided more accurate reporting. The Penn State Hershey Clinical Simulation Center's scheduling and reporting system can be adapted easily to most simulation centers and can expand and change to meet future growth with little or no expense to the center.

  7. BIM-BASED SCHEDULING OF CONSTRUCTION

    DEFF Research Database (Denmark)

    Andersson, Niclas; Büchmann-Slorup, Rolf

    2010-01-01

    The potential of BIM is generally recognized in the construction industry, but the practical application of BIM for management purposes is, however, still limited among contractors. The objective of this study is to review the current scheduling process of construction in light of BIM...... and communicate. Scheduling on the detailed level, on the other hand, follows a stipulated approach to scheduling, i.e. the Last Planner System (LPS), which is characterized by involvement of all actors in the construction phase. Thus, the major challenge when implementing BIM-based scheduling is to improve...

  8. Energy alternatives

    International Nuclear Information System (INIS)

    1981-01-01

    English. A special committe of the Canadian House of Commons was established on 23 May 1980 to investigate the use of alternative energy sources such as 'gasohol', liquified coal, solar energy, methanol, wind and tidal power, biomass, and propane. In its final report, the committee envisions an energy system for Canada based on hydrogen and electricity, using solar and geothermal energy for low-grade heat. The committe was not able to say which method of generating electricty would dominate in the next century, although it recommends that fossil fuels should not be used. The fission process is not specifically discussed, but the outlook for fusion was investigated, and continued governmental support of fusion research is recommended. The report proposes some improvements in governmental energy organizations and programs

  9. KASS v.2.2. scheduling software for construction

    Directory of Open Access Journals (Sweden)

    Krzemiński Michał

    2016-01-01

    Full Text Available The paper presents fourth version of specialist useful software in scheduling KASS v.2.2 (Algorithm Scheduling Krzeminski System. KASS software is designed for construction scheduling, specially form flow shop models. The program is being dedicated closely for the purposes of the construction. In distinguishing to other used programs in tasks of this type operational research criteria were designed closely with the thought about construction works and about the specificity of the building production. The minimal time, the minimal slack of brigades, the minimal slacks of the chosen working brigade and costs of the transfer operation of working fronts are included in operational research criteria between work centers. It is possible to enter data into the program both by hand as well as to load the Excel from files, similarly is with results, they are presented on-screen as well as a possibility of enrolling them in the file exists Excel. An element is very valid for it since allows for further simple processing of received results. In providing software for performing operational research calculations a technique of the complete review and simulation technology are being exploited. Described algorithms a program is using which will stay in the article as well as shown computational examples will remain.

  10. Project scheduling with resources constraints: application in the equipment production for the oil industry; Scheduling de projetos com restricao de recursos: aplicacao na producao de equipamentos para a industria de petroleo

    Energy Technology Data Exchange (ETDEWEB)

    Cruz, Carolina A.O.; Ferreira Filho, Virgilio J.M. [Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro, RJ (Brazil). Coordenacao dos Programas de Pos-graduacao de Engenharia (COPPE)

    2008-07-01

    One of the essential steps in the main scope Project Management is the Time Management made by the planning and control of the project schedule. In this work is presented the resource constrained scheduling problem beyond its mathematical formulation and a review of papers about this issue. In sequence is presented a practical example of this model considering a simplified model of an engineering project schedule of oil production equipment. The results obtained with the model application are shown and the conclusions about the work with resource constrained scheduling problems. (author)

  11. Alternative agriculture

    National Research Council Canada - National Science Library

    Committee on the Role of Alternative Farming Methods Staff

    1989-01-01

    ... National Research Council National Academy Press Washington, D.C. 1989 Copyrighttrue Please breaks inserted. are Page files. accidentally typesetting been have may original from the errors not typographic original retained, and from the created cannot be files XML from however, formatting, recomposed typesetting-specific has been work other ...

  12. Overlap Algorithms in Flexible Job-shop Scheduling

    Directory of Open Access Journals (Sweden)

    Celia Gutierrez

    2014-06-01

    Full Text Available The flexible Job-shop Scheduling Problem (fJSP considers the execution of jobs by a set of candidate resources while satisfying time and technological constraints. This work, that follows the hierarchical architecture, is based on an algorithm where each objective (resource allocation, start-time assignment is solved by a genetic algorithm (GA that optimizes a particular fitness function, and enhances the results by the execution of a set of heuristics that evaluate and repair each scheduling constraint on each operation. The aim of this work is to analyze the impact of some algorithmic features of the overlap constraint heuristics, in order to achieve the objectives at a highest degree. To demonstrate the efficiency of this approach, experimentation has been performed and compared with similar cases, tuning the GA parameters correctly.

  13. Alternative Fuel News, Vol. 3 No. 2

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1999-09-23

    This special issue of Alternative Fuel News highlights the Fifth National Clean Cities Conference held in Louisville, Kentucky. The momentum for the program is stronger than ever and the coalitions are working to propel the alternative fuel industry forward.

  14. A Multiple Criteria Genetic Algorithm Scheduling Tool for Production Scheduling in the Capital Goods Industry

    Directory of Open Access Journals (Sweden)

    Wenbin Xie

    2014-01-01

    Full Text Available Production planners usually aim to satisfy multiple objectives. This paper describes the development of a genetic algorithm tool that finds optimum trade-offs among delivery performance, resource utilisation, and workin-progress inventory. The tool was specifically developed to meet the requirements of capital goods companies that manufacture products with deep and complex product structures with components that have long and complicated routings. The model takes into account operation and assembly precedence relationships and finite capacity constraints. The tool was tested using various production problems that were obtained from a collaborating company. A series of experiments showed the tool provides a set of non-dominated solutions that enable the planner to choose an optimum trade-off according to their preferences. Previous research had optimised a single objective function. This is the first scheduling tool of its type that has simultaneously optimised delivery performance, resource utilisation and work-in-progress inventory. The quality of the schedules produced was significantly better than the approaches used by the collaborating company.

  15. Electric power scheduling - A distributed problem-solving approach

    Science.gov (United States)

    Mellor, Pamela A.; Dolce, James L.; Krupp, Joseph C.

    1990-01-01

    Space Station Freedom's power system, along with the spacecraft's other subsystems, needs to carefully conserve its resources and yet strive to maximize overall Station productivity. Due to Freedom's distributed design, each subsystem must work cooperatively within the Station community. There is a need for a scheduling tool which will preserve this distributed structure, allow each subsystem the latitude to satisfy its own constraints, and preserve individual value systems while maintaining Station-wide integrity.

  16. On the road to improved scheduling - fitting activities to capacity

    DEFF Research Database (Denmark)

    Lindhard, Søren Munch; Wandahl, Søren

    2012-01-01

    Last Planner System has through the sounding process increased the reliability of the schedule. The sound activities are moved to a buffer and afterwards selected to the Weekly Work Plans to match capacity. Therefore, in order to maximise productivity it is essential to ensure that the sounding...... solutions to the problem are suggested and discussed. It is proposed to simplify the production by decreasing the number of trades and tasks completed at site. This can be achieved by increasing...

  17. Updating Linear Schedules with Lowest Cost: a Linear Programming Model

    Science.gov (United States)

    Biruk, Sławomir; Jaśkowski, Piotr; Czarnigowska, Agata

    2017-10-01

    Many civil engineering projects involve sets of tasks repeated in a predefined sequence in a number of work areas along a particular route. A useful graphical representation of schedules of such projects is time-distance diagrams that clearly show what process is conducted at a particular point of time and in particular location. With repetitive tasks, the quality of project performance is conditioned by the ability of the planner to optimize workflow by synchronizing the works and resources, which usually means that resources are planned to be continuously utilized. However, construction processes are prone to risks, and a fully synchronized schedule may expire if a disturbance (bad weather, machine failure etc.) affects even one task. In such cases, works need to be rescheduled, and another optimal schedule should be built for the changed circumstances. This typically means that, to meet the fixed completion date, durations of operations have to be reduced. A number of measures are possible to achieve such reduction: working overtime, employing more resources or relocating resources from less to more critical tasks, but they all come at a considerable cost and affect the whole project. The paper investigates the problem of selecting the measures that reduce durations of tasks of a linear project so that the cost of these measures is kept to the minimum and proposes an algorithm that could be applied to find optimal solutions as the need to reschedule arises. Considering that civil engineering projects, such as road building, usually involve less process types than construction projects, the complexity of scheduling problems is lower, and precise optimization algorithms can be applied. Therefore, the authors put forward a linear programming model of the problem and illustrate its principle of operation with an example.

  18. Nurse scheduling using integer linear programming and constraint programming

    OpenAIRE

    Trilling , Lorraine; Guinet , Alain; Le Magny , Dominique

    2007-01-01

    6 pages; International audience; In order to reduce cost and to optimize the use of resources, hospitals are prompted to regroup facilities and human resources, especially in the surgical suite. This paper focuses on the anaesthesiology nurse scheduling problem (ANSP) of a French public hospital, where the anaesthesiology nurses constitute one of the most shared resources. They work in a cross way over surgical specialities and assume various activities. Two methods are proposed to solve the ...

  19. Scheduling in Sensor Grid Middleware for Telemedicine Using ABC Algorithm

    Directory of Open Access Journals (Sweden)

    T. Vigneswari

    2014-01-01

    Full Text Available Advances in microelectromechanical systems (MEMS and nanotechnology have enabled design of low power wireless sensor nodes capable of sensing different vital signs in our body. These nodes can communicate with each other to aggregate data and transmit vital parameters to a base station (BS. The data collected in the base station can be used to monitor health in real time. The patient wearing sensors may be mobile leading to aggregation of data from different BS for processing. Processing real time data is compute-intensive and telemedicine facilities may not have appropriate hardware to process the real time data effectively. To overcome this, sensor grid has been proposed in literature wherein sensor data is integrated to the grid for processing. This work proposes a scheduling algorithm to efficiently process telemedicine data in the grid. The proposed algorithm uses the popular swarm intelligence algorithm for scheduling to overcome the NP complete problem of grid scheduling. Results compared with other heuristic scheduling algorithms show the effectiveness of the proposed algorithm.

  20. 29 CFR 825.203 - Scheduling of intermittent or reduced schedule leave.

    Science.gov (United States)

    2010-07-01

    ... leave intermittently or on a reduced leave schedule for planned medical treatment, then the employee... 29 Labor 3 2010-07-01 2010-07-01 false Scheduling of intermittent or reduced schedule leave. 825... OF LABOR OTHER LAWS THE FAMILY AND MEDICAL LEAVE ACT OF 1993 Employee Leave Entitlements Under the...

  1. Designing cyclic appointment schedules for outpatient clinics with scheduled and unscheduled patient arrivals

    NARCIS (Netherlands)

    Kortbeek, Nikky; Zonderland, Maartje Elisabeth; Braaksma, Aleida; Vliegen, Ingrid M.H.; Boucherie, Richardus J.; Litvak, Nelli; Hans, Elias W.

    2014-01-01

    We present a methodology to design appointment systems for outpatient clinics and diagnostic facilities that offer both walk-in and scheduled service. The developed blueprint for the appointment schedule prescribes the number of appointments to plan per day and the moment on the day to schedule the

  2. Incremental Scheduling Engines: Cost Savings through Automation

    Science.gov (United States)

    Jaap, John; Phillips, Shaun

    2005-01-01

    As humankind embarks on longer space missions farther from home, the requirements and environments for scheduling the activities performed on these missions are changing. As we begin to prepare for these missions it is appropriate to evaluate the merits and applicability of the different types of scheduling engines. Scheduling engines temporally arrange tasks onto a timeline so that all constraints and ob.jectives are met and resources are not over-booked. Scheduling engines used to schedule space missions fall into three general categories: batch, mixed-initiative, and incremental. This paper, presents an assessment of the engine types, a discussion of the impact of human exploration of the moon and Mars on planning and scheduling, and the applicability of the different types of scheduling engines. This paper will pursue the hypothesis that incremental scheduling engines may have a place in the new environment; they have the potential to reduce cost, to improve the satisfaction of those who execute or benefit from a particular timeline (the customers), and to allow astronauts to plan their own tasks and those of their companion robots.

  3. Appointment scheduling with unscheduled arrivals and reprioritization

    NARCIS (Netherlands)

    Borgman, Nardo J.; Vliegen, Ingrid M.H.; Boucherie, Richard J.; Hans, Erwin W.

    2017-01-01

    Inspired by the real life problem of a radiology department in a Dutch hospital, we study the problem of scheduling appointments, taking into account unscheduled arrivals and reprioritization. The radiology department offers CT diagnostics to both scheduled and unscheduled patients. Of these

  4. A question of matching rather than scheduling

    NARCIS (Netherlands)

    van de Velde, S.L.

    1995-01-01

    Proper scheduling maintenance for Air Force C-130 aircraft involves the prevention of mismatches concerning the availability of the aircraft and a new wing kit which would prolong its use. Scheduling maintenance problems include the designation of wing kits in the production sequence to match for a

  5. Scheduling parameters in flexible manufacturing cells

    NARCIS (Netherlands)

    Slomp, J.; Gaalman, G.J.C.; Ahmad, M.M.; Sullivan, W.G.; Migliore, H.; Randhawa, S.

    1998-01-01

    The existence of a well-designed scheduling procedure is a major condition for an effective integration of a flexible manufacturing cell (FMC) in the material flow of a firm. This paper shows the presence and relative importance of three parameter types in the scheduling of operations on a flexible

  6. State Teacher Salary Schedules. Policy Analysis

    Science.gov (United States)

    Griffith, Michael

    2016-01-01

    In the United States most teacher compensation issues are decided at the school district level. However, a group of states have chosen to play a role in teacher pay decisions by instituting statewide teacher salary schedules. Education Commission of the States has found that 17 states currently make use of teacher salary schedules. This education…

  7. A Case Against Periodic Jukebox Scheduling

    NARCIS (Netherlands)

    Lijding, M.E.M.; Hanssen, F.T.Y.; Jansen, P.G.

    This paper presents the jukebox early quantum scheduler (JEQS). JEQS is a periodic jukebox scheduler for a Video-on-Demand system. JEQS uses the jukebox robots in a cyclic way and the time is divided in constant units called quanta. A quantum is the maximum time needed to unload and load all the

  8. Crew Scheduling for Netherlands Railways: "destination: customer"

    NARCIS (Netherlands)

    L.G. Kroon (Leo); M. Fischetti (Matteo)

    2000-01-01

    textabstract: In this paper we describe the use of a set covering model with additional constraints for scheduling train drivers and conductors for the Dutch railway operator NS Reizigers. The schedules were generated according to new rules originating from the project "Destination: Customer"

  9. DEVELOPMENT OF A MAINTENANCE SCHEDULING MODEL FOR ...

    African Journals Online (AJOL)

    The method is capable of stating the overhaul frequency of each machine within this time period. For convenience in the formulation of the model, maintenance schedule was divided into two parts, namely minor and major maintenance schedules. During a minor maintenance, an individual machine is checked and reset, ...

  10. Quarterly report on program cost and schedule

    International Nuclear Information System (INIS)

    1989-01-01

    This report is intended to provide a summary of the cost and schedule performance for the Civilian Radioactive Waste Management Program. Performance data are presented for each of the major program elements. Also included in this report is the status of the Nuclear Waste Fund revenues and disbursements. This report includes cost and schedule data through June 1989

  11. A Heuristic Approach to Scheduling University Timetables.

    Science.gov (United States)

    Loo, E. H.; And Others

    1986-01-01

    Categories of facilities utilization and scheduling requirements to be considered when using a heuristic approach to timetabling are described together with a nine-step algorithm and the computerized timetabling system, Timetable Schedules System (TTS); TTS utilizes heuristic approach. An example demonstrating use of TTS and a program flowchart…

  12. 5 CFR 950.801 - Campaign schedule.

    Science.gov (United States)

    2010-01-01

    ... 5 Administrative Personnel 2 2010-01-01 2010-01-01 false Campaign schedule. 950.801 Section 950... VOLUNTARY ORGANIZATIONS CFC Timetable § 950.801 Campaign schedule. (a) The Combined Federal Campaign will be.../International and International parts of the Charity List to all local campaigns by a date to be determined by...

  13. Unrelated Machine Scheduling with Stochastic Processing Times

    NARCIS (Netherlands)

    Skutella, Martin; Sviridenko, Maxim; Uetz, Marc Jochen

    Two important characteristics encountered in many real-world scheduling problems are heterogeneous processors and a certain degree of uncertainty about the processing times of jobs. In this paper we address both, and study for the first time a scheduling problem that combines the classical unrelated

  14. Machine scheduling with resource dependent processing times

    NARCIS (Netherlands)

    Grigoriev, A.; Sviridenko, M.; Uetz, Marc Jochen

    We consider machine scheduling on unrelated parallel machines with the objective to minimize the schedule makespan. We assume that, in addition to its machine dependence, the processing time of any job is dependent on the usage of a discrete renewable resource, e.g. workers. A given amount of that

  15. Agent-based scheduling for aircraft deicing

    NARCIS (Netherlands)

    Mao, X.; Ter Mors, A.W.; Roos, N.; Witteveen, C.

    2006-01-01

    The planning and scheduling of the deicing and anti-icing activities is an important and challenging part of airport departure planning. Deicing planning has to be done in a highly dynamic environment involving several autonomous and self-interested parties. Traditional centralized scheduling

  16. Energy alternative

    International Nuclear Information System (INIS)

    Suarez Antola, R.

    2010-01-01

    The present work is about primary sources the conventional fossil fuels (petroleum, coal and natural gas) and not conventional (nuclear fuels), as well as the solar light that reaches the floor, the winds, the rivers, the oceanic currents including the seas, and the biomass, among others. In the present technological era the primary sources are used for the most part to transform their energy into electric power.

  17. TECHNICAL COORDINATION, SCHEDULE AND INTEGRATION

    CERN Document Server

    A. Ball

    Introduction Since the lowering of YB0 in February, less spectacular but nonetheless crucial progress has been made along the critical path to CMS completion. The YB0 has been aligned with the beamline to a fraction of a mm, and the HCAL has been fully installed. Cabling scaffolding for YB0 services has been built and one half (-z end) of the ECAL barrel has been installed. The YB0 services installation has begun, with two of the major technical challenges delaying bulk installation, namely PP1 detailed design, manufacture and installation plus Tracker cooling pipe insulation, now apparently solved. Significant difficulties in detailed design, integration and procurement of cable ducts remain. Despite this, the design of the +end is close to complete, and Tracker power cable installation on two sectors of the +end is well advanced. A new master schedule, v36.0, is being prepared to account for the updated actual situation at point 5 and for the revised LHC machine planning. Safety The enormous amount of...

  18. Scheduling mammograms for asymptomatic women

    International Nuclear Information System (INIS)

    Gohagan, J.K.; Darby, W.P.; Spitznagel, E.L.; Tome, A.E.

    1988-01-01

    A decision theoretic model was used to investigate the relative importance of risk level, radiation hazard, mammographic accuracy, and cost in mammographic screening decision. The model uses woman-specific medical and family history facts and clinic-specific information regarding mammographic accuracy and practice to profile both woman and clinic, and to formulate periodic screening recommendations. Model parameters were varied extensively to investigate the sensitivity of screening schedules to input values. Multivariate risk was estimated within the program using published data from the Breast Cancer Detection Demonstration Project 5-year follow-up study. Radiation hazard estimates were developed from published radiation physics and radioepidemiologic risk data. Benchmark values for mammographic sensitivity and specificity under screening conditions were calculated from Breast Cancer Detection Demonstration Project data. Procedural costs used in the analysis were varied around values reflecting conditions at the Washington University Medical Center. Mortality advantages of early versus late breast cancer detection were accounted for using Health Insurance Plan of New York case survival rates. Results are compared with published screening policies to provide insight into implicit assumptions behind those policies. This analysis emphasizes the importance of accounting for variations in clinical accuracy under screening circumstances, in costs, in radiation exposure, and in woman-specific risk when recommending mammographic screening

  19. Improved utilization and responsiveness with gang scheduling

    Energy Technology Data Exchange (ETDEWEB)

    Feitelson, D.G., [Institute of Computer Science, The Hebrew University of Jerusalem (IsraelL); Jette, M.A. [Lawrence Livermore National Lab., CA (United States)

    1996-10-01

    Most commercial multicomputers use space-slicing schemes in which each scheduling decision has an unknown impact on the future: should a job be scheduled, risking that it will block other larger jobs later, or should the processors be left idle for now in anticipation of future arrivals? This dilemma is solved by using gang scheduling, because then the impact of each decision is limited to its time slice, and future arrivals can be accommodated in other time slices. This added flexibility is shown to improve overall system utilization and responsiveness. Empirical evidence from using gang scheduling on a Cray T3D installed at Lawrence Livermore National Lab corroborates these results, and shows conclusively that gang scheduling can be very effective with current technology. 29 refs., 10 figs., 6 tabs.

  20. IOPS advisor: Research in progress on knowledge-intensive methods for irregular operations airline scheduling

    Science.gov (United States)

    Borse, John E.; Owens, Christopher C.

    1992-01-01

    Our research focuses on the problem of recovering from perturbations in large-scale schedules, specifically on the ability of a human-machine partnership to dynamically modify an airline schedule in response to unanticipated disruptions. This task is characterized by massive interdependencies and a large space of possible actions. Our approach is to apply the following: qualitative, knowledge-intensive techniques relying on a memory of stereotypical failures and appropriate recoveries; and quantitative techniques drawn from the Operations Research community's work on scheduling. Our main scientific challenge is to represent schedules, failures, and repairs so as to make both sets of techniques applicable to the same data. This paper outlines ongoing research in which we are cooperating with United Airlines to develop our understanding of the scientific issues underlying the practicalities of dynamic, real-time schedule repair.

  1. Schedule Control and Nursing Home Quality: Exploratory Evidence of a Psychosocial Predictor of Resident Care.

    Science.gov (United States)

    Hurtado, David A; Berkman, Lisa F; Buxton, Orfeu M; Okechukwu, Cassandra A

    2016-02-01

    To examine whether nursing homes' quality of care was predicted by schedule control (workers' ability to decide work hours), independently of other staffing characteristics. Prospective ecological study of 30 nursing homes in New England. Schedule control was self-reported via survey in 2011-2012 (N = 1,045). Quality measures included the prevalence of decline in activities of daily living, residents' weight loss, and pressure ulcers, indicators systematically linked with staffing characteristics. Outcomes data for 2012 were retrieved from Medicare.gov. Robust Linear Regressions showed that higher schedule control predicted lower prevalence of pressure ulcers (β = -0.51, p job satisfaction, and turnover intentions. Higher schedule control might enhance the planning and delivery of strategies to prevent or cure pressure ulcers. Further research is needed to identify potential causal mechanisms by which schedule control could improve quality of care. © The Author(s) 2014.

  2. Routine environmental monitoring schedule, calendar year 1997

    Energy Technology Data Exchange (ETDEWEB)

    Markes, B.M., Westinghouse Hanford

    1996-12-10

    This document provides the Environmental Restorations Contractor (ERC) and the Project Hanford Management Contractor.(PHMC) a schedule in accordance with the WHC-CM-7-5, Environmental Compliance` and BHI- EE-02, Environmental Requirements, of monitoring and sampling routines for the Near-Field Monitoring (NFM) program during calendar year (CY) 1997. Every attempt will be made to consistently follow this schedule; any deviation from this schedule will be documented by an internal memorandum (DSI) explaining the reason for the deviation. The DSI will be issued by the scheduled performing organization and directed to Near-Field Monitoring. The survey frequencies for particular sites are determined by the technical judgment of Near- Field Monitoring and may depend on the site history, radiological status, use, and general conditions. Additional surveys may be requested at irregular frequencies if conditions warrant. All radioactive wastes sites are scheduled to be surveyed at least annually. Any newly discovered wastes sites not documented by this schedule will be included in the revised schedule for CY 1998. The outside perimeter road surveys of 200 East and West Area and the rail survey from the 300 Area to Columbia Center will be performed in the year 2000 per agreement with Department of Energy. Richland Field Office. This schedule does not discuss staffing needs, nor does it list the monitoring equipment to be used in completing specific routines. Personnel performing routines to meet this schedule shall communicate any need for assistance in completing these routines to Radiological Control management and Near-Field Monitoring. After each routine survey is completed, a copy of the survey record, maps, and data sheets will be forwarded to Near-Field Monitoring. These routine surveys will not be considered complete until this documentation is received. At the end of each month, the ERC and PHMC radiological control organizations shall forward a copy of the Routine

  3. Identifying and evaluating environmental impacts associated with timber harvest scheduling policies.

    Science.gov (United States)

    Robert M. Randall; Robert W. Sassaman

    1979-01-01

    Expected impacts on the ecosystem and nontimber benefits (that is, people's use of the resources—recreation, hunting, fishing, swimming, etc.) resulting from alternative timber harvest scheduling policies are identified and evaluated for the Mount Hood National Forest. Environmental criteria are established and used in evaluations of timber harvest and...

  4. Functional Communication Training without Extinction Using Concurrent Schedules of Differing Magnitudes of Reinforcement in Classrooms

    Science.gov (United States)

    Davis, Dawn H.; Fredrick, Laura D.; Alberto, Paul A.; Gama, Roberto

    2012-01-01

    This study investigated the effects of functional communication training (FCT) implemented with concurrent schedules of differing magnitudes of reinforcement in lieu of extinction to reduce inappropriate behaviors and increase alternative mands. Participants were four adolescent students diagnosed with severe emotional and behavior disorders…

  5. Simulation of a Novel Schedule for Intensivist Staffing to Improve Continuity of Patient Care and Reduce Physician Burnout.

    Science.gov (United States)

    Geva, Alon; Landrigan, Christopher P; van der Velden, Meredith G; Randolph, Adrienne G

    2017-07-01

    Despite widespread adoption of in-house call for ICU attendings, there is a paucity of research on optimal scheduling of intensivists to provide continuous on-site coverage. Overnight call duties have traditionally been added onto 7 days of continuous daytime clinical service. We designed an alternative ICU staffing model to increase continuity of attending physician care for patients while also decreasing interruptions to attendings' nonclinical weeks. Computer-based simulation of a 1-year schedule. A simulated ICU divided into two daytime teams each covered by a different attending and both covered by one overnight on-call attending. Simulated patients were randomly admitted on different service days to assess continuity of care. A "shared service schedule" was compared to a standard "7 days on schedule." For the 7 days on schedule, an attending covered a team for 7 consecutive days and off-service attendings cross-covered each night. For the shared schedule, four attendings shared the majority of daytime and nighttime service for two teams over 2 weeks, with recovery periods built into the scheduled service time. Continuity of care as measured by the Continuity of Attending Physician Index increased by 9% with the shared schedule. Annually, the shared service schedule was predicted to increase free weekends by 3.4 full weekends and 1.3 weekends with either Saturday or Sunday off. Full weeks without clinical obligations increased by 4 weeks. Mean time between clinical obligations increased by 5.8 days. A shared service schedule is predicted to improve continuity of care while increasing free weekends and continuity of uninterrupted nonclinical weeks for attendings. Computer-based simulation allows assessment of benefits and tradeoffs of the alternative schedule without disturbing existing clinical systems.

  6. Idaho National Engineering Laboratory Environmental Restoration Program Schedule Contingency Evaluation Report

    International Nuclear Information System (INIS)

    1993-09-01

    This report represents the schedule contingency evaluation done on the FY-93 Major System Acquisition (MSA) Baseline for the Idaho National Engineering Laboratory's (INEL) Environmental Restoration Program (EPP). A Schedule Contingency Evaluation Team (SCET) was established to evaluate schedule contingency on the MSA Baseline for the INEL ERP associated with completing work within milestones established in the baseline. Baseline schedules had been established considering enforceable deadlines contained in the Federal Facilities Agreement/Consent Order (FFA/CO), the agreement signed in 1992, by the State of Idaho, Department of Health ampersand Welfare, the U.S. Environmental Protection Agency, Region 10, and the U.S. Department of Energy, Idaho Operations Office. The evaluation was based upon the application of standard schedule risk management techniques to the specific problems of the INEL ERP. The schedule contingency evaluation was designed to provided early visibility for potential schedule delays impacting enforceable deadlines. The focus of the analysis was on the duration of time needed to accomplish all required activities to achieve completion of the milestones in the baseline corresponding to the enforceable deadlines. Additionally, the analysis was designed to identify control of high-probability, high-impact schedule risk factors

  7. The role of the production scheduling system in rescheduling

    Science.gov (United States)

    Kalinowski, K.; Grabowik, C.; Kempa, W.; Paprocka, I.

    2015-11-01

    The paper presents the rescheduling problem in the context of cooperation between production scheduling system (PSS) and other units in an integrated manufacturing environment - decision makers and software systems. The main aim is to discuss the PSS functionality for maximizing automation of the rescheduling process, reducing the response time and improving the quality of generated solutions. PSSs operate in the meeting of tactical and operational level of planning and control, and play an important role in the production preparation and control. On the basis of information about orders, technology and production system state (e.g. resources availability) they prepare and/or update a detailed plan of production flow - a schedule. All necessary data for scheduling and rescheduling are usually collected in other systems both from organizational and technical production preparation, e.g. ERP, PLM, MES, CAPP or others, as well as they are entered directly by the decision- makers/operators. Data acquired in this way are often incomplete and inconsistent. Therefore the existing rescheduling software works according to interactive method - rather support but does not replace the human decision maker in tasks planning. When rescheduling, due to the limited amount of time to make a decision this interaction is particularly important. An additional problem arises in data acquisition, in the process of data exchanging between systems or in the identification of new data sources and their processing. Different approaches to rescheduling were characterized, including those solutions, where all these operations are carried out by an autonomous system and those in which scheduling is performed only upon request from the outside, for the newly created scheduling data representing the current state of the production system.

  8. Optimal Residential Load Scheduling Under Utility and Rooftop Photovoltaic Units

    Directory of Open Access Journals (Sweden)

    Ghulam Hafeez

    2018-03-01

    Full Text Available With the rapid advancement in technology, electrical energy consumption is increasing rapidly. Especially, in the residential sector, more than 80% of electrical energy is being consumed because of consumer negligence. This brings the challenging task of maintaining the balance between the demand and supply of electric power. In this paper, we focus on the problem of load balancing via load scheduling under utility and rooftop photovoltaic (PV units to reduce electricity cost and peak to average ratio (PAR in demand-side management. For this purpose, we adopted genetic algorithm (GA, binary particle swarm optimization (BPSO, wind-driven optimization (WDO, and our proposed genetic WDO (GWDO algorithm, which is a hybrid of GA and WDO, to schedule the household load. For energy cost estimation, combined real-time pricing (RTP and inclined block rate (IBR were used. The proposed algorithm shifts load from peak consumption hours to off-peak hours based on combined pricing scheme and generation from rooftop PV units. Simulation results validate our proposed GWDO algorithm in terms of electricity cost and PAR reduction while considering all three scenarios which we have considered in this work: (1 load scheduling without renewable energy sources (RESs and energy storage system (ESS, (2 load scheduling with RESs, and (3 load scheduling with RESs and ESS. Furthermore, our proposed scheme reduced electricity cost and PAR by 22.5% and 29.1% in scenario 1, 47.7% and 30% in scenario 2, and 49.2% and 35.4% in scenario 3, respectively, as compared to unscheduled electricity consumption.

  9. Overcoming barriers to scheduling embedded generation to support distribution networks

    Energy Technology Data Exchange (ETDEWEB)

    Wright, A.J.; Formby, J.R.

    2000-07-01

    Current scheduling of embedded generation for distribution in the UK is limited and patchy. Some DNOs actively schedule while others do none. The literature on the subject is mainly about accommodating volatile wind output, and optimising island systems, for both cost of supply and network stability. The forthcoming NETA will lower prices, expose unpredictable generation to imbalance markets and could introduce punitive constraint payments on DNOs, but at the same time create a dynamic market for both power and ancillary services from embedded generators. Most renewable generators either run as base load (e.g. waste ) or according to the vagaries of the weather (e.g. wind, hydro), so offer little scope for scheduling other than 'off'. CHP plant is normally heat- led for industrial processes or building needs, but supplementary firing or thermal storage often allow considerable scope for scheduling. Micro-CHP with thermal storage could provide short-term scheduling, but tends to be running anyway during the evening peak. Standby generation appears to be ideal for scheduling, but in practice operators may be unwilling to run parallel with the network, and noise and pollution problems may preclude frequent operation. Statistical analysis can be applied to calculate the reliability of several generators compared to one; with a large number of generators such as micro-CHP reliability of a proportion of load is close to unity. The type of communication for generation used will depend on requirements for bandwidth, cost, reliability and whether it is bundled with other services. With high levels of deeply embedded, small-scale generation using induction machines, voltage control and black start capability will become important concerns on 11 kV and LV networks. This will require increased generation monitoring and remote control of switchgear. Examples of cost benefits from scheduling are given, including deferred reinforcement, increased exports on non

  10. NRC comprehensive records disposition schedule. Revision 3

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1998-02-01

    Title 44 US Code, ``Public Printing and Documents,`` regulations issued by the General Service Administration (GSA) in 41 CFR Chapter 101, Subchapter B, ``Management and Use of Information and Records,`` and regulations issued by the National Archives and Records Administration (NARA) in 36 CFR Chapter 12, Subchapter B, ``Records Management,`` require each agency to prepare and issue a comprehensive records disposition schedule that contains the NARA approved records disposition schedules for records unique to the agency and contains the NARA`s General Records Schedules for records common to several or all agencies. The approved records disposition schedules specify the appropriate duration of retention and the final disposition for records created or maintained by the NRC. NUREG-0910, Rev. 3, contains ``NRC`s Comprehensive Records Disposition Schedule,`` and the original authorized approved citation numbers issued by NARA. Rev. 3 incorporates NARA approved changes and additions to the NRC schedules that have been implemented since the last revision dated March, 1992, reflects recent organizational changes implemented at the NRC, and includes the latest version of NARA`s General Records Schedule (dated August 1995).

  11. NRC comprehensive records disposition schedule. Revision 3

    International Nuclear Information System (INIS)

    1998-02-01

    Title 44 US Code, ''Public Printing and Documents,'' regulations issued by the General Service Administration (GSA) in 41 CFR Chapter 101, Subchapter B, ''Management and Use of Information and Records,'' and regulations issued by the National Archives and Records Administration (NARA) in 36 CFR Chapter 12, Subchapter B, ''Records Management,'' require each agency to prepare and issue a comprehensive records disposition schedule that contains the NARA approved records disposition schedules for records unique to the agency and contains the NARA's General Records Schedules for records common to several or all agencies. The approved records disposition schedules specify the appropriate duration of retention and the final disposition for records created or maintained by the NRC. NUREG-0910, Rev. 3, contains ''NRC's Comprehensive Records Disposition Schedule,'' and the original authorized approved citation numbers issued by NARA. Rev. 3 incorporates NARA approved changes and additions to the NRC schedules that have been implemented since the last revision dated March, 1992, reflects recent organizational changes implemented at the NRC, and includes the latest version of NARA's General Records Schedule (dated August 1995)

  12. Using icons to convey medication schedule information.

    Science.gov (United States)

    Morrow, D G; Leirer, V O; Andrassy, J M

    1996-08-01

    We examined older adult comprehension and memory for medication schedules conveyed by different types of visual icons as well as text. Three icons were compared: a timeline, a pair of 12 h clocks (one for AM and one for PM hours) and a 24 h clock. In Experiment 1, older and younger participants paraphrased and then recalled schedules that were conveyed by the three icons or by text. Text and timeline schedules were paraphrased more accurately than either clock icon. Paraphrase errors suggested that subjects had trouble integrating schedule information across the two 12 h clocks. Analysis of paraphrase times showed that the text schedule was paraphrased most quickly, followed by the timeline, the 24 h clock and the 12 h clock. No differences were found for the accuracy of recalling the icon and text schedules. Experiment 2 examined free and cued recall after limited study time by older adults. Because text superiority in Experiment 1 may have reflected greater familiarity with text than with icons, recall was examined across four trials in Experiment 2. Text was recalled most accurately, followed by the timeline, the 24 h clock and the 12 h clock. Study-test trials did not influence recall. Text schedules may have been generally more effective than the icons because of their greater familiarity. The timeline may have been the most effective icon because it was more compact and familiar than the clock icons used in the study. The findings suggest that including such icons in medication instructions requires training.

  13. NEWS OF THE NATIONAL IMMUNIZATION SCHEDULE

    Directory of Open Access Journals (Sweden)

    O. V. Shamsheva

    2014-01-01

    Full Text Available The article presents the changes Immunization Schedule Russia introduced in 2014. In new Schedule now is the vaccination against pneumococcal disease for all children of 2 months with revaccination at 4 and 15 months old; excluded from the Schedule second revaccination against tuberculosis. At risk groups to be vaccinated against the flu, entered pregnant women and persons subject to military conscription. Recommendations on use of vaccines containing relevant antigens for the Russian Federation, to provide maximum effectiveness of immunization and vaccines that do not contain preservatives in children under 1 year of age. Offered to create a council of experts in the field of vaccinology and vaccine prevention

  14. Simultaneous scheduling of machines and mobile robots

    DEFF Research Database (Denmark)

    Dang, Vinh Quang; Nielsen, Izabela Ewa

    2013-01-01

    This paper deals with the problem of simultaneously scheduling machines and a number of autonomous mobile robots in a flexible manufacturing system (FMS). Besides capability of transporting materials between machines, the considered mobile robots are different from other material handling devices...... in terms of their advanced ability to perform tasks at machines by using their manipulation arms. The mobile robots thus have to be scheduled in relation to scheduling of machines so as to increase the efficiency of the overall system. The performance criterion is to minimize time required to complete all...

  15. Design Evolution of a Fighter Training Scheduling Decision Support System.

    Science.gov (United States)

    1987-03-01

    classes of about 25 - 30 students each, the schedulers work with a confusing maze of syllabus and squadron rules. The 435󈧭 works with seven different... evA 4 A#04 he d7I11/4yed( ,,ec so A; qiwe CIRCUMSTANCE: 6lcA $1’ ie’,’ Maskf AcCVy- Isl ,rS ,t ,lS evos,-.r 7a ctri+st" Pr Je. (20) Figure I.l...proficiency. Two types of check rides are given. The instrument check eva ’,ates the Instructor Pilots instrument flying ability. The qualification

  16. Implementation Learning and Forgetting Curve to Scheduling in Garment Industry

    Science.gov (United States)

    Muhamad Badri, Huda; Deros, Baba Md; Syahri, M.; Saleh, Chairul; Fitria, Aninda

    2016-02-01

    The learning curve shows the relationship between time and the cumulative number of units produced which using the mathematical description on the performance of workers in performing repetitive works. The problems of this study is level differences in the labors performance before and after the break which affects the company's production scheduling. The study was conducted in the garment industry, which the aims is to predict the company production scheduling using the learning curve and forgetting curve. By implementing the learning curve and forgetting curve, this paper contributes in improving the labors performance that is in line with the increase in maximum output 3 hours productive before the break are 15 unit product with learning curve percentage in the company is 93.24%. Meanwhile, the forgetting curve improving maximum output 3 hours productive after the break are 11 unit product with the percentage of forgetting curve in the company is 92.96%. Then, the obtained 26 units product on the productive hours one working day is used as the basic for production scheduling.

  17. A stochastic optimization model for shift scheduling in emergency departments.

    Science.gov (United States)

    El-Rifai, Omar; Garaix, Thierry; Augusto, Vincent; Xie, Xiaolan

    2015-09-01

    Excessive waiting time in Emergency Departments (ED) can be both a cause of frustration and more importantly, a health concern for patients. Waiting time arises when the demand for work goes beyond the facility's service capacity. ED service capacity mainly depends on human resources and on beds available for patients. In this paper, we focus on human resources organization in an ED and seek to best balance between service quality and working conditions. More specifically, we address the personnel scheduling problem in order to optimize the shift distribution among employees and minimize the total expected patients' waiting time. The problem is also characterized by a multi-stage re-entrant service process. With an appropriate approximation of patients' waiting times, we first propose a stochastic mixed-integer programming model that is solved by a sample average approximation (SAA) approach. The resulting personnel schedules are then evaluated using a discrete-event simulation model. Numerical experiments are then performed with data from a French hospital to compare different personnel scheduling strategies.

  18. Effects of activity-rest schedules on physiological strain and spinal load in hospital-based porters.

    Science.gov (United States)

    Beynon, C; Burke, J; Doran, D; Nevill, A

    2000-10-01

    Workers in physically demanding occupations require rest breaks to recover from physiological stress and biomechanical loading. Physiological stress can increase the risk of developing musculoskeletal disorders and repeated loading of the spine may increase the potential for incurring back pain. The aim of the study was to assess the impact of an altered activity-rest schedule on physiological and spinal loading in hospital-based porters. An existing 4-h activity-rest schedule was obtained from observations on eight male porters. This schedule formed the normal trial, which included two 5- and one 15-min breaks. An alternative 4-h schedule was proposed (experimental condition) that had two breaks each of 12.5 min. It was hypothesized that the experimental trial is more effective in promoting recovery from physiological strain and spinal shrinkage than the normal trial, due to the 5-min breaks being insufficient to allow physiological variables to return to resting levels or the intervertebral discs to reabsorb fluid. Ten males performed both test conditions and oxygen uptake VO2, heart rate, minute ventilation VE, perceived exertion and spinal shrinkage were recorded. There were no significant differences in any of the measured variables between the two trials (p > 0.05). Median heart rates were 78 (range 71-93) and 82 (71-90) beats.min(-1) for the normal trial and the experimental trial respectively, indicating that the activity was of low intensity. The light intensity was corroborated by the oxygen uptakes (0.75, range 0.65-0.94 1.min(-1)). Spinal shrinkage occurred to the same extent in the two trials (2.12 +/- 3.16 mm and 2.88 +/- 2.92 mm in the normal trial and the experimental trial respectively). Varying the length and positioning of the rest breaks did not significantly affect the physiological responses or magnitude of spinal shrinkage between the two trials. More physically demanding work than the porters' schedule should induce greater physiological

  19. Practical Experiences With Torque Meta-Scheduling In The Czech National Grid

    Directory of Open Access Journals (Sweden)

    Simon Toth

    2012-01-01

    Full Text Available The Czech National Grid Infrastructure went through a complex transition inthe last year. The production environment has been switched from a commercialbatch system PBSPro, which was replaced by an open source alternative Torquebatch system.This paper concentrates on two aspects of this transition. First, we will presentour practical experience with Torque being used as a production ready batchsystem. Our modified version of Torque, with all the necessary PBSPro ex-clusive features re-implemented and further extended with new features likecloud-like behaviour, was deployed across the entire production environment,covering the entire Czech Republic for almost a full year.In the second part, we will present our work on meta-scheduling. This in-volves our work on distributed architecture and cloud-grid convergence. Thedistributed architecture was designed to overcome the limitations of a centralserver setup, which was originally used and presented stability and performanceissues. While this paper does not discuss the inclusion of cloud interfaces intogrids, it does present the dynamic infrastructure, which is a requirement forsharing the grid infrastructure between a batch system and a cloud gateway.We are also inviting everyone to try out our fork of the Torque batch system,which is now publicly available.

  20. Effects of Port Congestion in the Gate Control List Scheduling of Time Sensitive Networks

    DEFF Research Database (Denmark)

    Kentis, Angelos Mimidis; Berger, Michael Stübert; Soler, José

    2017-01-01

    Time Sensitive Networking (TSN) can provide deterministic traffic behavior over Ethernet networks, for time sensitive traffic, whilst also bound the delay/jitter. To do so, the IEEE TSN working group introduced a network-wide transmission port scheduling mechanism. The duration of this schedule......, the same set of experiments was repeated, with and without considering port congestion during path allocation. The computed paths were given as input to an implementation of the shifting bottleneck heuristic algorithm. The shifting bottleneck heuristic, computed the network-wide gating schedule...

  1. A novel discrete PSO algorithm for solving job shop scheduling problem to minimize makespan

    Science.gov (United States)

    Rameshkumar, K.; Rajendran, C.

    2018-02-01

    In this work, a discrete version of PSO algorithm is proposed to minimize the makespan of a job-shop. A novel schedule builder has been utilized to generate active schedules. The discrete PSO is tested using well known benchmark problems available in the literature. The solution produced by the proposed algorithms is compared with best known solution published in the literature and also compared with hybrid particle swarm algorithm and variable neighborhood search PSO algorithm. The solution construction methodology adopted in this study is found to be effective in producing good quality solutions for the various benchmark job-shop scheduling problems.

  2. Transmission Scheduling and Routing Algorithms for Delay Tolerant Networks

    Science.gov (United States)

    Dudukovich, Rachel; Raible, Daniel E.

    2016-01-01

    The challenges of data processing, transmission scheduling and routing within a space network present a multi-criteria optimization problem. Long delays, intermittent connectivity, asymmetric data rates and potentially high error rates make traditional networking approaches unsuitable. The delay tolerant networking architecture and protocols attempt to mitigate many of these issues, yet transmission scheduling is largely manually configured and routes are determined by a static contact routing graph. A high level of variability exists among the requirements and environmental characteristics of different missions, some of which may allow for the use of more opportunistic routing methods. In all cases, resource allocation and constraints must be balanced with the optimization of data throughput and quality of service. Much work has been done researching routing techniques for terrestrial-based challenged networks in an attempt to optimize contact opportunities and resource usage. This paper examines several popular methods to determine their potential applicability to space networks.

  3. Organization of the construction and schedule of realization

    International Nuclear Information System (INIS)

    Szerovay, Antal; Vogel, Oszkar

    1988-01-01

    The four units of the Paks nuclear power plant with all the auxiliary and service facilities were constructed between 1974 and 1987. Major features of building activities, types of buildings classified according to the connection between the facility and the technology are listed. Processes and structures applied to the construction of the main reactor building are mentioned emphasizing the importance of up-to-date building methods. To move the large equipment into the reactor building Potain cranes of 400 Mp were used. As a result of adequate schedule the auxiliary buildings could be used as preparatory buildings during the construction of the plant. The energy and material supply, the schedule of the construction works are discussed. (V.N.) 6 refs.; 5 figs

  4. Scheduling at the Los Alamos Neutron Science Center (LANSCE)

    International Nuclear Information System (INIS)

    Gallegos, F.R.

    1999-01-01

    The centerpieces of the Los Alamos Neutron Science Center (LANSCE) are a half-mile long 800-MeV proton linear accelerator and proton storage ring. The accelerator, storage ring, and target stations provide the protons and spallation neutrons that are used in the numerous basic research and applications experimental programs supported by the US Department of Energy. Experimental users, facility maintenance personnel, and operations personnel must work together to achieve the most program benefit within defined budget and resource constraints. In order to satisfy the experimental users programs, operations must provide reliable and high quality beam delivery. Effective and efficient scheduling is a critical component to achieve this goal. This paper will detail how operations scheduling is presently executed at the LANSCE accelerator facility

  5. Scheduling at the Los Alamos Neutron Science Center (LANSCE)

    Energy Technology Data Exchange (ETDEWEB)

    Gallegos, F.R.

    1999-02-01

    The centerpieces of the Los Alamos Neutron Science Center (LANSCE) are a half-mile long 800-MeV proton linear accelerator and proton storage ring. The accelerator, storage ring, and target stations provide the protons and spallation neutrons that are used in the numerous basic research and applications experimental programs supported by the US Department of Energy. Experimental users, facility maintenance personnel, and operations personnel must work together to achieve the most program benefit within defined budget and resource constraints. In order to satisfy the experimental users programs, operations must provide reliable and high quality beam delivery. Effective and efficient scheduling is a critical component to achieve this goal. This paper will detail how operations scheduling is presently executed at the LANSCE accelerator facility.

  6. Double-shell tank waste system assessment status and schedule

    International Nuclear Information System (INIS)

    Walter, E.J.

    1995-01-01

    The integrated program for completing the integrity assessments of the dangerous waste tank systems managed by the Tank Waste Remediation System (TWRS) Division of Westinghouse Hanford Company is presented in the Tank Waste Remediation System Tank System Integrity Assessments Program Plan, WHC-SD-AP017, Rev. 1. The program plan identified the assessment requirements and the general scope to which these requirements applied. Some of these assessment requirements have been met and others are either in process of completion or scheduled to be worked. To define the boundary of the double-shell tank (DST) system and the boundaries of the DST system components (or system parts) for the purpose of performing integrity assessment activities; To identify the planned activities to meet the assessment requirements for each component; Provide the status of the assessment activities; and Project a five year assessment activity schedule

  7. Evolutionary based system for production scheduling in foundry

    Directory of Open Access Journals (Sweden)

    A. Stawowy

    2008-10-01

    Full Text Available This work presents a development of a capable-to-promise system for companies that operate under the hybrid make-to-order and maketo-stock strategy in a lot-sizing and flowshop environment. Proposed system simultaneously considers planning and scheduling processesin order to achieve the optimality. Optimisation engine is based on an advanced evolutionary algorithm. Information available in ERPsystem from different production units and stages, the optimization module, and customer requests are integrated via Internet using XMLlanguage as a data exchange standard.The details on key elements of the system and a software architecture are given. Practical application of the system is illustrated on the example of production scheduling for an iron castings foundry.

  8. Schedule Optimization Study, Hanford RI/FS Program

    Energy Technology Data Exchange (ETDEWEB)

    1992-12-01

    A Schedule Optimization Study (SOS) of the US Department of Energy (DOE) Hanford Site Remedial Investigation/Feasibility Study (RI/FS) Program was conducted by an independent team of professionals from other federal agencies and the private sector experienced in environmental restoration. This team spent two weeks at Hanford in September 1992 examining the reasons for the lengthy RI/FS process at Hanford and developing recommendations to expedite the process. The need for the study arose out of a schedule dispute regarding the submission of the 1100-EM-1 Operable Unit RI/FS Work Plan. This report documents the study called for in the August 29, 1991, Dispute Resolution Committee Decision Statement. Battelle's Environmental Management Operations (EMO) coordinated the effort for DOE's Richland Field Office (RL).

  9. Machine scheduling to minimize weighted completion times the use of the α-point

    CERN Document Server

    Gusmeroli, Nicoló

    2018-01-01

    This work reviews the most important results regarding the use of the α-point in Scheduling Theory. It provides a number of different LP-relaxations for scheduling problems and seeks to explain their polyhedral consequences. It also explains the concept of the α-point and how the conversion algorithm works, pointing out the relations to the sum of the weighted completion times. Lastly, the book explores the latest techniques used for many scheduling problems with different constraints, such as release dates, precedences, and parallel machines. This reference book is intended for advanced undergraduate and postgraduate students who are interested in scheduling theory. It is also inspiring for researchers wanting to learn about sophisticated techniques and open problems of the field.

  10. Development of a new genetic algorithm to solve the feedstock scheduling problem in an anaerobic digester

    Science.gov (United States)

    Cram, Ana Catalina

    As worldwide environmental awareness grow, alternative sources of energy have become important to mitigate climate change. Biogas in particular reduces greenhouse gas emissions that contribute to global warming and has the potential of providing 25% of the annual demand for natural gas in the U.S. In 2011, 55,000 metric tons of methane emissions were reduced and 301 metric tons of carbon dioxide emissions were avoided through the use of biogas alone. Biogas is produced by anaerobic digestion through the fermentation of organic material. It is mainly composed of methane with a rage of 50 to 80% in its concentration. Carbon dioxide covers 20 to 50% and small amounts of hydrogen, carbon monoxide and nitrogen. The biogas production systems are anaerobic digestion facilities and the optimal operation of an anaerobic digester requires the scheduling of all batches from multiple feedstocks during a specific time horizon. The availability times, biomass quantities, biogas production rates and storage decay rates must all be taken into account for maximal biogas production to be achieved during the planning horizon. Little work has been done to optimize the scheduling of different types of feedstock in anaerobic digestion facilities to maximize the total biogas produced by these systems. Therefore, in the present thesis, a new genetic algorithm is developed with the main objective of obtaining the optimal sequence in which different feedstocks will be processed and the optimal time to allocate to each feedstock in the digester with the main objective of maximizing the production of biogas considering different types of feedstocks, arrival times and decay rates. Moreover, all batches need to be processed in the digester in a specified time with the restriction that only one batch can be processed at a time. The developed algorithm is applied to 3 different examples and a comparison with results obtained in previous studies is presented.

  11. Efficient Academic Scheduling at the U.S. Naval Academy

    National Research Council Canada - National Science Library

    Zane, David

    2003-01-01

    This research project examined academic scheduling problems at the U.S. Naval Academy. The focus was on devising methods to construct good final exam schedules and improve existing course schedules by facilitation course changes...

  12. Proposing New Heuristic Approaches for Preventive Maintenance Scheduling

    Directory of Open Access Journals (Sweden)

    majid Esmailian

    2013-08-01

    Full Text Available The purpose of preventive maintenance management is to perform a series of tasks that prevent or minimize production breakdowns and improve reliability of production facilities. An important objective of preventive maintenance management is to minimize downtime of production facilities. In order to accomplish this objective, personnel should efficiently allocate resources and determine an effective maintenance schedule. Gopalakrishnan (1997 developed a mathematical model and four heuristic approaches to solve the preventive maintenance scheduling problem of assigning skilled personnel to work with tasks that require a set of corresponding skills. However, there are several limitations in the prior work in this area of research. The craft combination problem has not been solved because the craft combination is assumed as given. The craft combination problem concerns the computation of all combinations of assigning multi skilled workers to accomplishment of a particular task. In fact, determining craft combinations is difficult because of the exponential number of craft combinations that are possible. This research provides a heuristic approach for determining the craft combination and four new heuristic approach solution for the preventive maintenance scheduling problem with multi skilled workforce constraints. In order to examine the new heuristic approach and to compare the new heuristic approach with heuristic approach of Gopalakrishnan (1997, 81 standard problems have been generated based on the criterion suggested by from Gopalakrishnan (1997. The average solution quality (SQ of the new heuristic approaches is 1.86% and in old heuristic approaches is 8.32%. The solution time of new heuristic approaches are shorter than old heuristic approaches. The solution time of new heuristic approaches is 0.78 second and old heuristic approaches is 6.43 second, but the solution time of mathematical model provided by Gopalakrishnan (1997 is 152 second.

  13. Economic and psychological burden of scheduled surgery ...

    African Journals Online (AJOL)

    Background: Cancellation of scheduled surgery creates a financial burden for hospitals, caregivers and patients. Cancellation ... management. High cancellation rates may indicate that rare health resources are being used ineffectively, thereby increasing costs. There are many reasons for surgery cancellation including.

  14. Dynamical model for retrieval of tram schedule

    Science.gov (United States)

    Nagatani, Takashi

    2007-04-01

    We present the dynamical model for retrieval of a tram schedule when trams arrive at stops slower or faster than the schedule. Trams speed up or stop shorter to retrieve the delay. The dynamics of the trams is expressed in terms of the nonlinear maps. We study the dynamical behavior of trams when they control the speed and stopping time to retrieve the schedule. The arrival times of trams exhibit the complex behavior with varying trips. The trams show the periodic and irregular (chaotic) motions even if there are no noises. The tram chaos is controlled by varying both stopping time and degree of speedup. The tram schedule is connected with the complex motions of trams. The region map (phase diagram) is shown to control the complex motions of trams.

  15. Home Appliance Load Scheduling with SEMIAH

    DEFF Research Database (Denmark)

    Jacobsen, Rune Hylsberg; Ghasem Azar, Armin; Zhang, Qi

    2015-01-01

    The European research project SEMIAH aims at designing a scalable infrastructure for residential demand response. This paper presents the progress towards a centralized load scheduling algorithm for controlling home appliances taking power grid constraints and satisfaction of consumers into account....

  16. Efficient Load Scheduling Method For Power Management

    Directory of Open Access Journals (Sweden)

    Vijo M Joy

    2015-08-01

    Full Text Available An efficient load scheduling method to meet varying power supply needs is presented in this paper. At peak load times the power generation system fails due to its instability. Traditionally we use load shedding process. In load shedding process disconnect the unnecessary and extra loads. The proposed method overcomes this problem by scheduling the load based on the requirement. Artificial neural networks are used for this optimal load scheduling process. For generate economic scheduling artificial neural network has been used because generation of power from each source is economically different. In this the total load required is the inputs of this network and the power generation from each source and power losses at the time of transmission are the output of the neural network. Training and programming of the artificial neural networks are done using MATLAB.

  17. Strategic Gang Scheduling for Railroad Maintenance

    Science.gov (United States)

    2012-08-14

    We address the railway track maintenance scheduling problem. The problem stems from the : significant percentage of the annual budget invested by the railway industry for maintaining its railway : tracks. The process requires consideration of human r...

  18. Schedule Sales Query Report Generation System

    Data.gov (United States)

    General Services Administration — Schedule Sales Query presents sales volume figures as reported to GSA by contractors. The reports are generated as quarterly reports for the current year and the...

  19. Quantify Risk to Manage Cost and Schedule

    National Research Council Canada - National Science Library

    Raymond, Fred

    1999-01-01

    Too many projects suffer from unachievable budget and schedule goals, caused by unrealistic estimates and the failure to quantify and communicate the uncertainty of these estimates to managers and sponsoring executives...

  20. 40 CFR 52.626 - Compliance schedules.

    Science.gov (United States)

    2010-07-01

    ...) APPROVAL AND PROMULGATION OF IMPLEMENTATION PLANS Hawaii § 52.626 Compliance schedules. (a) (b) The.... Source Location Regulation sections involved Date of adoption Nanakuli Paving & Rock Co., Ltd Molokai 8...