Optimizing fire station locations for the Istanbul metropolitan municipality

Copyright @ 2013 INFORMSThe Istanbul Metropolitan Municipality (IMM) seeks to determine locations for additional fire stations to build in Istanbul; its objective is to make residences and historic sites reachable by emergency vehicles within five minutes of a fire station’s receipt of a service request. In this paper, we discuss our development of a mathematical model to aid IMM in determining these locations by using data retrieved from its fire incident records. We use a geographic information system to implement the model on Istanbul’s road network, and solve two location models—set-covering and maximal-covering—as what-if scenarios. We discuss 10 scenarios, including the situation that existed when we initiated the project and the scenario that IMM implemented. The scenario implemented increases the city’s fire station coverage from 58.6 percent to 85.9 percent, based on a five-minute response time, with an implementation plan that spans three years

Common mental disorders and mortality in the West of Scotland Twenty-07 Study: comparing the General Health Questionnaire and the Hospital Anxiety and Depression Scale

Background While various measures of common mental disorders (CMD) have been found to be associated with mortality, a comparison of how different measures predict mortality may improve our understanding of the association. This paper compares how the Hospital Anxiety and Depression Scale (HADS) and the 30-item General Health Questionnaire (GHQ-30) predict all cause and cause-specific mortality. Methods Data on 2547 men and women from two cohorts, aged approximately 39 and 55 years, from the West of Scotland Twenty-07 Study who were followed up for mortality over an average of 18.9 (SD 5.0) years. Scores were calculated for HADS depression (HADS-D), HADS Anxiety (HADS-A) and GHQ-30. Cox Proportional Hazards Models were used to determine how each CMD measure predicted mortality. Results After adjusting for serious physical illness, smoking, social class, alcohol, obesity, pulse rate and living alone, HRs (95% CI) per SD increase in score for all-cause mortality were: 1.15 (1.07 to 1.25) for HADSD; 1.13 (1.04 to 1.23) for GHQ-30 and 1.05 (0.96 to 1.14) for HADS-A. After the same adjustments, cardiovascular disease mortality was also related to HADS-D (HR 1.24 (1.07 to 1.43)), to GHQ-30 (HR 1.24 (1.11 to 1.40)) and to HADS-A (HR 1.15 (1.01 to 1.32)); respiratory mortality to GHQ-30 (HR 1.33 (1.13 to 1.55)) and mortality from other causes, excluding injuries, to HADS-D (HR 1.28 (1.05 to 1.55)). Conclusions There were associations between CMD and both all-cause and cause-specific mortality which were broadly similar for GHQ-30 and HADS-D and were still present after adjustment for important confounders and mediators

Association between psychosomatic health symptoms and common mental illness in Ghanaian adolescents: Age and gender as potential moderators

Little is known about the role of age and gender in the association between psychosomatic symptoms and common mental illness in Ghanaian adolescents. This cross-sectional study examined age and gender as moderators between psychosomatic symptoms and common mental illness using data from a school-based survey ( N = 770). Males reported higher psychosomatic symptoms and common mental illness, while younger adolescents reported higher common mental illness only. Psychosomatic symptoms were positively associated with common mental illness, but age and gender did not moderate this association. Interventions aimed at reducing the prevalence rate in psychosomatic symptoms are crucial in decreasing common mental illness in Ghanaian adolescents. </jats:p

Maverick dark matter at colliders

Assuming that dark matter is a weakly interacting massive particle (WIMP) species X produced in the early Universe as a cold thermal relic, we study the collider signal of pp or ppbar -> XXbar + jets and its distinguishability from standard-model background processes associated with jets and missing energy. We assume that the WIMP is the sole particle related to dark matter within reach of the LHC--a "maverick" particle--and that it couples to quarks through a higher dimensional contact interaction. We simulate the WIMP final-state signal XXbar + jet and dominant standard-model (SM) background processes and find that the dark-matter production process results in higher energies for the colored final state partons than do the standard-model background processes, resulting in more QCD radiation and a higher jet multiplicity. As a consequence, the detectable signature of maverick dark matter is an excess over standard-model expectations of events consisting of large missing transverse energy, together with large leading jet transverse momentum and scalar sum of the transverse momenta of the jets. Existing Tevatron data and forthcoming LHC data can constrain (or discover!) maverick dark matter.Comment: 11 pages, 7 figure

Casting Light on Dark Matter

The prospects for detecting a candidate supersymmetric dark matter particle at the LHC are reviewed, and compared with the prospects for direct and indirect searches for astrophysical dark matter. The discussion is based on a frequentist analysis of the preferred regions of the Minimal supersymmetric extension of the Standard Model with universal soft supersymmetry breaking (the CMSSM). LHC searches may have good chances to observe supersymmetry in the near future - and so may direct searches for astrophysical dark matter particles, whereas indirect searches may require greater sensitivity, at least within the CMSSM.Comment: 16 pages, 13 figures, contribution to the proceedings of the LEAP 2011 Conferenc

Reasons for and consequences of missed appointments in general practice in the UK: questionnaire survey and prospective review of medical records

Background Missed appointments are a common occurrence in primary care in the UK, yet little is known about the reasons for them, or the consequences of missing an appointment. This paper aims to determine the reasons for missed appointments and whether patients who miss an appointment subsequently consult their general practitioner (GP). Secondary aims are to compare psychological morbidity, and the previous appointments with GPs between subjects and a comparison group. Methods Postal questionnaire survey and prospective medical notes review of adult patients missing an appointment and the comparison group who attended appointments over a three week period in seven general practices in West Yorkshire. Results Of the 386 who missed appointments 122 (32%) responded. Of the 386 in the comparison group 223 (58%) responded, resulting in 23 case-control matched pairs with complete data collection. Over 40% of individuals who missed an appointment and participated said that they forgot the appointment and a quarter said that they tried very hard to cancel the appointment or that it was at an inconvenient time. A fifth reported family commitments or being too ill to attend. Over 90% of the patients who missed an appointment subsequently consulted within three months and of these nearly 60% consulted for the stated problem that was going to be presented in the missed consultation. The odds of missing an appointment decreased with increasing age and were greater among those who had missed at least one appointment in the previous 12 months. However, estimates for comparisons between those who missed appointments and the comparison group were imprecise due to the low response rate. Conclusion Patients who miss appointments tend to cite practice factors and their own forgetfulness as the main reasons for doing so, and most attend within three months of a missed appointment. This study highlights a number of implications for future research. More work needs to be done to engage people who miss appointments into research in a meaningful way

A Submodular Approach for Reference Recommendation

© 2020, Springer Nature Singapore Pte Ltd. Choosing appropriate references for a given topic is an important, yet challenging task. The pool of potential candidates is typically very large, in the order of tens of thousands, and growing by the day. For this reason, this paper proposes an approach for automatically providing a reference list for a given manuscript. The approach is based on an original submodular inference function which balances relevance, coverage and diversity in the reference list. Experiments are carried out using an ACL corpus as a source for the references and evaluated by MAP, MRR and precision-recall. The results show the remarkable comparative performance of the proposed approach

Gender Differences in Emergency Department (ED) Patient Mechanical Fall Risk and Openness to Communication with Providers

Gender Differences in Emergency Department (ED) Patient Mechanical Fall Risk and Openness to Communication with Providers Bryan G Kane, MD, Michael C Nguyen MD, Robert D Barraco, MD MPH, Brian Stello MD, Arnold Goldberg MD, Clare M Lenhart, PhD MPH, Bernadette G Porter BA ,Anita Kurt PhD, RN, Marna Rayl Greenberg DO, MPH Objectives: The CDC reports that among older adults (≥65), falls are the leading cause of injury-related death and rates of fall-related fractures among older women are more than twice those for men. We set out to determine ED patient perceptions (analyzed by gender) about their personal fall risk compared to their actual risk and their comfort level in discussing their fall history or a home safety plan with their healthcare provider. Methods: After IRB approval, a convenience sample of ED patients (50 years or older) was surveyed at a suburban Level 1 Trauma center with an annual ED census of approximately 75,000. The survey included demographics, the Falls Efficacy Scale (FES), and questions about fall risk. The FES is a validated survey measuring concern of falling. Analysis included descriptive statistics and assessment of fall risk and fear of falling by gender using chi-square and t-tests as indicated. Significance was set at 0.05. Results: Of the 150 surveys collected, 149 indicated gender and were included in this analysis. Fifty-five percent of the sample was female (n=82); 45% (n=67) were male. Most (98%) were Caucasian and 22% reported living alone. There was not a difference in the mean age of female participants 69.79 years (SD=12.08) vs. males 68.06 (SD=10.36; p=0.355). See Table 1 for distribution of reported fall risk factors between genders. Collectively, these variables resulted in a mean risk of falling score of 3.37(SD=1.62) out of 9. On average, female participants had a significantly higher objective risk of falling than did male participants (3.65 vs. 3.02 p=0.018). Similarly, females also reported greater fear of falling than did males (FES score 12.33 vs. 9.62; p=0.005). Significantly more females (41.5%) than males (23.9%, p=0.037) reported having fallen in the past year. Of the 50 participants reporting past-year falls, only 19 (12 female and 7 male, p=0.793) sought treatment. The correlation between actual fall risk and fear of falling were greater among females (p The majority of patients (76.4%) were willing to speak to a provider about their fall risk. No significant difference was noted in willingness to discuss this topic with a provider based on gender (p=0.619), objective fall risk (p=0.145) or FES score (p=0.986). Similarly, many respondents indicated a willing to discuss a home safety evaluation with a provider (58.1%) and responses did not vary significantly by gender (p=.140), objective fall risk (p=0.168) or FES score (p=.584). Conclusion: In this study, female ED patients reported a greater fear of falling, had a significantly higher objective risk of falling, and had a higher correlation between their perceived risk and actual risk of falling than did males. The majority of both genders were amenable to discussing their fall risk and a home safety evaluation with their provider

Modified CAGE as a Screening Tool for Mechanical Fall Risk Assessment: A Pilot Survey

Modified CAGE as a Screening Tool for Mechanical Fall Risk Assessment: A Pilot Survey Marna Rayl Greenberg DO, MPH, Michael C Nguyen MD, Bernadette G Porter BA,Robert DBarraco, MD MPH, Brian Stello MD, Arnold Goldberg MD, Clare M Lenhart, PhD MPH,Anita Kurt PhD, RN, Bryan G Kane, MD Background: Falls in the elderly cause serious injury. The literature does not hold answers to patient perceptions about their personal fall risk, their comfort level in discussing their fall history, or a home safety plan with their healthcare provider. Existing risk-assessing tools may be prohibitive in the Emergency Department due to their length and complexity. Objective: We piloted a modified CAGE screen (Fig1) to identify adults at risk for falls. Methods: At a community health event, a convenience sample ofparticipants (50 years or older) was surveyed. The survey included demographics, the Falls Efficacy Scale (FES), the modified CAGEand questions about fall risk.The FES is a validated, but longer, survey metric for comparison. A modified CAGE score greater than or equal to 1 was considered positive. Analysis included descriptive statistics and modified CAGE groups were compared by gender, fall risk and history with chi-square. Results: One hundred sevensubjects (66.4%female, 32.7% male) with a mean age of 66 (SD7.9)participated; 98 (91.6%)were Caucasian. Twenty (18.7%) lived alone,43 (40.2%) had a cat or dog, and 91 (85%) had stairs at home. Six (5.6%) reported using assistive devices, 2 (1.9%) at-risk alcohol use; 9 (8.4%)taking blood thinners, 50 (46.7%) taking blood pressure medications, and 22 (20.6%) one or more medications that could make them drowsy. Thirty-threesubjects(30.8%) reported having fallen in the past year; only13 (39.4% of those fallen)sought treatment. Collectively, these variables resulted in a mean risk of falling score of 2.49 (SD=1.36) out of 9. Eleven (31.4%)femalesand27 (38.0%)malesrecorded ≥1 positive responses on the modified CAGE.A modified CAGE positive responsewas significantly greater among those with past-year falls (51.5%) than those without (29.7%), p=0.031.A positive modified CAGE screen was also associated with a higher mean FES score (10.82 v7.83, p More females than males reported past year falls (36.6% vs. 17.1%, p=0.04) yet no difference in fall risk was noted between genders (4.44 vs. 4.26, p=0.506). The proportion of modified CAGE positive participants did not vary between females and males (38% vs. 31%, p=0.505). Of those whoscreened positive on the modified CAGE, 36 (92.3%) reported comfort in speaking to their healthcare provider about their fall risk and 26 (66.7%) in having a home safety evaluation. Conclusions: In this pilot, a positive modified CAGE is associated with both higher FES scores and a willingness to discuss fall risk with a health care provider. The modifiedCAGE may be a usefulbrief screening tool to detect fall risk in adults. Further studies to determine the extent of its utility in an Emergency Department should be considered