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Sample records for factors multivariate logistic

  1. MULTIVARIATE STEPWISE LOGISTIC REGRESSION ANALYSIS ON RISK FACTORS OF VENTILATOR-ASSOCIATED PNEUMONIA IN COMPREHENSIVE ICU

    Institute of Scientific and Technical Information of China (English)

    管军; 杨兴易; 赵良; 林兆奋; 郭昌星; 李文放

    2003-01-01

    Objective To investigate the incidence, crude mortality and independent risk factors of ventilator-associated pneumonia (VAP) in comprehensive ICU in China.Methods The clinical and microbiological data were retrospectively collected and analysed of all the 97 patients receiving mechanical ventilation (>48hr) in our comprehensive ICU during 1999. 1 - 2000. 12. Firstly several statistically significant risk factors were screened out with univariate analysis, then independent risk factors were determined with multivariate stepwise logistic regression analysis.Results The incidence of VAP was 54. 64% (15. 60 cases per 1000 ventilation days), the crude mortality 47.42% . Interval between the establishment of artificial airway and diagnosis of VAP was 6.9 ± 4.3 d. Univariate analysis suggested that indwelling naso-gastric tube, corticosteroid, acid inhibitor, third-generation cephalosporin/ imipenem, non - infection lung disease, and extrapulmonary infection were the statistically significant risk factors of

  2. Study of risk factors affecting both hypertension and obesity outcome by using multivariate multilevel logistic regression models

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    Sepedeh Gholizadeh

    2016-07-01

    Full Text Available Background:Obesity and hypertension are the most important non-communicable diseases thatin many studies, the prevalence and their risk factors have been performedin each geographic region univariately.Study of factors affecting both obesity and hypertension may have an important role which to be adrressed in this study. Materials &Methods:This cross-sectional study was conducted on 1000 men aged 20-70 living in Bushehr province. Blood pressure was measured three times and the average of them was considered as one of the response variables. Hypertension was defined as systolic blood pressure ≥140 (and-or diastolic blood pressure ≥90 and obesity was defined as body mass index ≥25. Data was analyzed by using multilevel, multivariate logistic regression model by MlwiNsoftware. Results:Intra class correlations in cluster level obtained 33% for high blood pressure and 37% for obesity, so two level model was fitted to data. The prevalence of obesity and hypertension obtained 43.6% (0.95%CI; 40.6-46.5, 29.4% (0.95%CI; 26.6-32.1 respectively. Age, gender, smoking, hyperlipidemia, diabetes, fruit and vegetable consumption and physical activity were the factors affecting blood pressure (p≤0.05. Age, gender, hyperlipidemia, diabetes, fruit and vegetable consumption, physical activity and place of residence are effective on obesity (p≤0.05. Conclusion: The multilevel models with considering levels distribution provide more precise estimates. As regards obesity and hypertension are the major risk factors for cardiovascular disease, by knowing the high-risk groups we can d careful planning to prevention of non-communicable diseases and promotion of society health.

  3. Factors related to clinical pregnancy after vitrified-warmed embryo transfer: a retrospective and multivariate logistic regression analysis of 2313 transfer cycles.

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    Shi, Wenhao; Zhang, Silin; Zhao, Wanqiu; Xia, Xue; Wang, Min; Wang, Hui; Bai, Haiyan; Shi, Juanzi

    2013-07-01

    What factors does multivariate logistic regression show to be significantly associated with the likelihood of clinical pregnancy in vitrified-warmed embryo transfer (VET) cycles? Assisted hatching (AH) and if the reason to freeze embryos was to avoid the risk of ovarian hyperstimulation syndrome (OHSS) were significantly positively associated with a greater likelihood of clinical pregnancy. Single factor analysis has shown AH, number of embryos transferred and the reason of freezing for OHSS to be positively and damaged blastomere to be negatively significantly associated with the chance of clinical pregnancy after VET. It remains unclear what factors would be significant after multivariate analysis. The study was a retrospective analysis of 2313 VET cycles from 1481 patients performed between January 2008 and April 2012. A multivariate logistic regression analysis was performed to identify the factors to affect clinical pregnancy outcome of VET. There were 22 candidate variables selected based on clinical experiences and the literature. With the thresholds of α entry = α removal= 0.05 for both variable entry and variable removal, eight variables were chosen to contribute the multivariable model by the bootstrap stepwise variable selection algorithm (n = 1000). Eight variables were age at controlled ovarian hyperstimulation (COH), reason for freezing, AH, endometrial thickness, damaged blastomere, number of embryos transferred, number of good-quality embryos, and blood presence on transfer catheter. A descriptive comparison of the relative importance was accomplished by the proportion of explained variation (PEV). Among the reasons for freezing, the OHSS group showed a higher OR than the surplus embryo group when compared with other reasons for VET groups (OHSS versus Other, OR: 2.145; CI: 1.4-3.286; Surplus embryos versus Other, OR: 1.152; CI: 0.761-1.743) and high PEV (marginal 2.77%, P = 0.2911; partial 1.68%; CI of area under receptor operator characteristic

  4. Multivariate Logistic Model to estimate Effective Rainfall for an Event

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    Singh, S. K.; Patil, Sachin; Bárdossy, A.

    2009-04-01

    Multivariate logistic models are widely used in biological, medical, and social sciences but logistic models are seldom applied to hydrological problems. A logistic function behaves linear in the mid range and tends to be non-linear as it approaches to the extremes, hence it is more flexible than a linear function and capable of dealing with skew-distributed variables. They seem to bear good potential to handle asymmetrically distributed hydrological variables of extreme occurrence. In this study, logistic regression approach is implemented to derive a multivariate logistic function for effective rainfall; in the process runoff coefficient is assumed to be a Bernoulli-distributed dependent variable. A backward stepwise logistic regression procedure was performed to derive the logistic transfer function between runoff coefficient and catchment as well as event variables (e.g. drainage density, soil moisture etc). The investigation was carried out using data base for 244 rainfall-runoff events from 42 mesoscale catchments located in south-west Germany. The performance of the derived logistic transfer function was compared with that of SCS method for estimation of effective rainfall.

  5. Factor analysis of multivariate data

    Digital Repository Service at National Institute of Oceanography (India)

    Fernandes, A.A.; Mahadevan, R.

    A brief introduction to factor analysis is presented. A FORTRAN program, which can perform the Q-mode and R-mode factor analysis and the singular value decomposition of a given data matrix is presented in Appendix B. This computer program, uses...

  6. Logistical Factors in Teachers' Motivation

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    Daniels, Erika

    2016-01-01

    Research in education and psychology contributes to an understanding of how educators create contexts for learning that encourage intrinsic motivation and increase academic achievement. In this article, the researcher investigated how teachers themselves define effectiveness and identified what factors influence their motivation, both positively…

  7. Logistical Factors in Teachers' Motivation

    Science.gov (United States)

    Daniels, Erika

    2016-01-01

    Research in education and psychology contributes to an understanding of how educators create contexts for learning that encourage intrinsic motivation and increase academic achievement. In this article, the researcher investigated how teachers themselves define effectiveness and identified what factors influence their motivation, both positively…

  8. Multivariate logistic regression analysis of the risk factors of respiratory distress syndrome in neonates%新生儿呼吸窘迫综合征高危因素的多变量 Logistic回归分析

    Institute of Scientific and Technical Information of China (English)

    任颖; 马磊; 刘述

    2014-01-01

    目的:对新生儿呼吸窘迫综合征( RDS)进行流行病学调查,分析其高危因素。方法:2011年2月-2013年1月间调查10104个新生儿,包括监护病房收治的122例RDS患儿。应用Logistic回归分析计算优势比( OR)及其95%置信区间。结果:胎龄<32周,新生儿性别,低出生体重,产妇年龄,选择性剖宫产是RDS的高危因素;而产妇妊娠期疾病不能作为RDS独立的危险因素。结论:新生儿出现RDS及预后受多种因素影响。应防止新生儿出现RDS的各种高危因素,采取措施有效降低新生儿RDS的发生率,并改善患儿预后。%Objective:To investigate the risk factors of respiratory distress syndrome ( RDS) in neonates via an epidemiologic survey. Methods:A total of 10104 neonates, including 122 neonates with RDS in the intensive care unit, were surveyed between February 2011 and January 2013. Multivariate regression analyses, including the odds ratios and 95% confidence intervals, of the risk factors of RDS were performed. Results:The gestational age of 32 weeks or less, gender, low birth weight, maternal age, caesarean section, but not the maternal diseases during pregnancy, were risk factors of RDS in neonates. Conclusion:The incidence and prognosis of RDS could be influenced by multiple factors. This warrants effective measures to reduce the incidence of neonatal RDS and improve the prognosis.

  9. Information and Covariance Matrices for Multivariate Burr III and Logistic distributions

    CERN Document Server

    Yari, G; Yari, Gholamhossein; Mohammad-Djafari, Ali

    2004-01-01

    Main result of this paper is to derive the exact analytical expressions of information and covariance matrices for multivariate Burr III and logistic distributions. These distributions arise as tractable parametric models in price and income distributions, reliability, economics, populations growth and survival data. We showed that all the calculations can be obtained from one main moment multi dimensional integral whose expression is obtained through some particular change of variables. Indeed, we consider that this calculus technique for improper integral has its own importance in applied probability calculus.

  10. Multivariate Analysis of Clinical Factors in Restenosis after Coronary Stenting

    Institute of Scientific and Technical Information of China (English)

    Wen Shangyu; Mao Jieming; Guo Liiun; Zhao Yiming; Zhang Fuchun; Guo Jingxlan; Cheng Mingzhe

    2000-01-01

    Ojbective To find the independent predictors for restenosis after coronary stenting.Methods Quantitative angiography was performed on 60 cases (67 successfully dilated lesions) after angioplasty over 6-months follow-up, and both univariate and multivariate logistic regression analysis were done to identify the correlations of restenosis with clinical factors. Results The total restenosis rate was 31.3%(21 of 67 lesions), and according to univariate analysis the patients who underwent coronary stenting ≥3.5mm had a lower rate of restenosis ( P < 0. 01).Collateral circulation to the obstruction site, high maximal inflation pressure, smoking and the less minimal lumen diameter after PTCA made the rate of restenosis higherower ( P < 0.05) . Multivariate logistic regression analysis showed that coronary stenting ≥ 3.5mm had a low rate of restenosis, but high maximal inflation pressure and smoking made the restenosis rate higher. Conclusion Coronary stent size, maximal inflation pressure and. smoking were independent predictors for restenosis.

  11. Model for Building a Distribution Network Based on the Multivariate Analysis of the Industrial and Logistical Potential of Regions

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    Alexander Vladimirovich Kirillov

    2015-12-01

    Full Text Available The international integration of the Russian economy is connected to the need of the realization of the competitive advantages of the geopolitical position of Russia, the industrial potential of regions, the logistic infrastructure of transport corridors. This article discusses the design model of the supply chain (distribution network based on the multivariate analysis and the methodology of the substantiation of its configuration based on the cost factors and the level of the logistics infrastructure development. For solving the problem of placing one or more logistics centers in the service area, a two-stage algorithm is used. At the first stage, the decisions on the reasonability of the choice of one or another version of the development are made with А. В. Кириллов, В. Е. Целин 345 ЭКОНОМИКА РЕГИОНА №4 (2015 the use of the “Make or Buy” standard model. The criterion of decision making is the guaranteed overcoming of the threshold of “indifference” taking into account the statistical characteristics of costs for options of “buy” and “make” depending on the volume of consumption of goods or services. At the second stage, the Ardalan’s heuristic method is used for the evaluation of the choice of placing one or more logistics centers in the service area. The model parameters are based on the assessment of the development prospects of the region and its investment potential (existence and composition of employment, production, natural resources, financial and consumer opportunities, institutional, innovation, infrastructure capacity. Furthermore, such criteria as a regional financial appeal, professionally trained specialists, the competitive advantages of the promoted company and others are analyzed. An additional criterion is the development of the priority matrix, which considers such factors as difficulties of customs registration and certification, a level of regional transport

  12. Remote sensing and GIS-based landslide hazard analysis and cross-validation using multivariate logistic regression model on three test areas in Malaysia

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    Pradhan, Biswajeet

    2010-05-01

    This paper presents the results of the cross-validation of a multivariate logistic regression model using remote sensing data and GIS for landslide hazard analysis on the Penang, Cameron, and Selangor areas in Malaysia. Landslide locations in the study areas were identified by interpreting aerial photographs and satellite images, supported by field surveys. SPOT 5 and Landsat TM satellite imagery were used to map landcover and vegetation index, respectively. Maps of topography, soil type, lineaments and land cover were constructed from the spatial datasets. Ten factors which influence landslide occurrence, i.e., slope, aspect, curvature, distance from drainage, lithology, distance from lineaments, soil type, landcover, rainfall precipitation, and normalized difference vegetation index (ndvi), were extracted from the spatial database and the logistic regression coefficient of each factor was computed. Then the landslide hazard was analysed using the multivariate logistic regression coefficients derived not only from the data for the respective area but also using the logistic regression coefficients calculated from each of the other two areas (nine hazard maps in all) as a cross-validation of the model. For verification of the model, the results of the analyses were then compared with the field-verified landslide locations. Among the three cases of the application of logistic regression coefficient in the same study area, the case of Selangor based on the Selangor logistic regression coefficients showed the highest accuracy (94%), where as Penang based on the Penang coefficients showed the lowest accuracy (86%). Similarly, among the six cases from the cross application of logistic regression coefficient in other two areas, the case of Selangor based on logistic coefficient of Cameron showed highest (90%) prediction accuracy where as the case of Penang based on the Selangor logistic regression coefficients showed the lowest accuracy (79%). Qualitatively, the cross

  13. Multivariate logistic regression analysis of postoperative complications and risk model establishment of gastrectomy for gastric cancer: A single-center cohort report.

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    Zhou, Jinzhe; Zhou, Yanbing; Cao, Shougen; Li, Shikuan; Wang, Hao; Niu, Zhaojian; Chen, Dong; Wang, Dongsheng; Lv, Liang; Zhang, Jian; Li, Yu; Jiao, Xuelong; Tan, Xiaojie; Zhang, Jianli; Wang, Haibo; Zhang, Bingyuan; Lu, Yun; Sun, Zhenqing

    2016-01-01

    Reporting of surgical complications is common, but few provide information about the severity and estimate risk factors of complications. If have, but lack of specificity. We retrospectively analyzed data on 2795 gastric cancer patients underwent surgical procedure at the Affiliated Hospital of Qingdao University between June 2007 and June 2012, established multivariate logistic regression model to predictive risk factors related to the postoperative complications according to the Clavien-Dindo classification system. Twenty-four out of 86 variables were identified statistically significant in univariate logistic regression analysis, 11 significant variables entered multivariate analysis were employed to produce the risk model. Liver cirrhosis, diabetes mellitus, Child classification, invasion of neighboring organs, combined resection, introperative transfusion, Billroth II anastomosis of reconstruction, malnutrition, surgical volume of surgeons, operating time and age were independent risk factors for postoperative complications after gastrectomy. Based on logistic regression equation, p=Exp∑BiXi / (1+Exp∑BiXi), multivariate logistic regression predictive model that calculated the risk of postoperative morbidity was developed, p = 1/(1 + e((4.810-1.287X1-0.504X2-0.500X3-0.474X4-0.405X5-0.318X6-0.316X7-0.305X8-0.278X9-0.255X10-0.138X11))). The accuracy, sensitivity and specificity of the model to predict the postoperative complications were 86.7%, 76.2% and 88.6%, respectively. This risk model based on Clavien-Dindo grading severity of complications system and logistic regression analysis can predict severe morbidity specific to an individual patient's risk factors, estimate patients' risks and benefits of gastric surgery as an accurate decision-making tool and may serve as a template for the development of risk models for other surgical groups.

  14. Exploratory Tobit factor analysis for multivariate censored data

    NARCIS (Netherlands)

    Kamakura, WA; Wedel, M

    2001-01-01

    We propose Multivariate Tobit models with a factor structure on the covariance matrix. Such models are particularly useful in the exploratory analysis of multivariate censored data and the identification of latent variables from behavioral data. The factor structure provides a parsimonious

  15. 影响狼疮性肾炎患者并发股骨头坏死危险因素的多元Logistic回归分析%Effect of lupus nephritis multivariate Logistic regression analysis of risk factors in patients with avascular necrosis of the femoral head

    Institute of Scientific and Technical Information of China (English)

    赵晔

    2015-01-01

    目的:探讨影响狼疮性肾炎( LN)患者并发股骨头坏死危险因素。方法将2009年8月至2013年8月收治的50例LN患者并发股骨头坏死患者作为观察组,另外选择同期收治的50例LN未并发股骨头坏死患者作为对照组。分别采用Pearson单因素与多元Logistic回归分析的方法,对影响LN患者并发股骨头坏死的危险因素进行分析。结果经Pearson单因素分析,两组患者在口腔溃疡、雷诺现象、血管炎、纤维蛋白原( Fib)升高、总胆固醇( TC)、三酰甘油(TG)水平方面的差异均具有统计学意义( P <0.05~0.01);经多元Logistic回归分析,口腔溃疡、雷诺现象、血管炎、Fib升高、TC及TG水平为影响LN并发股骨头坏死的危险因素。结论影响LN患者并发股骨头坏死的危险因素包括口腔溃疡、雷诺氏现象、血管炎、Fib升高、TC及TG水平,在实际治疗过程中应注意针对这些因素采取措施。%Objective To study the effect of lupus nephritis( LN)patients complicated with femoral head necrosis factor risk. Methods Between 2009 August to 2013 August in our hospital,50 cases of LN patients complicated with avascular necrosis of the femoral head of patients were included as the observation group,in addition to selecting 50 cases of avascular necrosis of femoral head without LN patients as control group. Using univariate Pearson and multivariate Logistic regression analysis to analyze the influence on the risk of LN patients with femoral head necrosis. Results The single factor analysis by Pearson,two groups of patients with oral ulcer,Raynaud′s phenomenon,vasculitis,elevated Fib,TC and TG level in terms of the differences were statistically significant( P <0. 05 ~0. 01). By multivariate Logistic regression analysis,oral ulcer, Raynaud′s phenomenon,vasculitis,increased Fib,TC and the level of TG( P <0. 05)are the risk factors for the effect of LN complicated with femoral head

  16. Classification and regression tree analysis vs. multivariable linear and logistic regression methods as statistical tools for studying haemophilia.

    Science.gov (United States)

    Henrard, S; Speybroeck, N; Hermans, C

    2015-11-01

    Haemophilia is a rare genetic haemorrhagic disease characterized by partial or complete deficiency of coagulation factor VIII, for haemophilia A, or IX, for haemophilia B. As in any other medical research domain, the field of haemophilia research is increasingly concerned with finding factors associated with binary or continuous outcomes through multivariable models. Traditional models include multiple logistic regressions, for binary outcomes, and multiple linear regressions for continuous outcomes. Yet these regression models are at times difficult to implement, especially for non-statisticians, and can be difficult to interpret. The present paper sought to didactically explain how, why, and when to use classification and regression tree (CART) analysis for haemophilia research. The CART method is non-parametric and non-linear, based on the repeated partitioning of a sample into subgroups based on a certain criterion. Breiman developed this method in 1984. Classification trees (CTs) are used to analyse categorical outcomes and regression trees (RTs) to analyse continuous ones. The CART methodology has become increasingly popular in the medical field, yet only a few examples of studies using this methodology specifically in haemophilia have to date been published. Two examples using CART analysis and previously published in this field are didactically explained in details. There is increasing interest in using CART analysis in the health domain, primarily due to its ease of implementation, use, and interpretation, thus facilitating medical decision-making. This method should be promoted for analysing continuous or categorical outcomes in haemophilia, when applicable. © 2015 John Wiley & Sons Ltd.

  17. Using Logistic Regression and Random Forests multivariate statistical methods for landslide spatial probability assessment in North-Est Sicily, Italy

    Science.gov (United States)

    Trigila, Alessandro; Iadanza, Carla; Esposito, Carlo; Scarascia-Mugnozza, Gabriele

    2015-04-01

    first phase of the work addressed to identify the spatial relationships between the landslides location and the 13 related factors by using the Frequency Ratio bivariate statistical method. The analysis was then carried out by adopting a multivariate statistical approach, according to the Logistic Regression technique and Random Forests technique that gave best results in terms of AUC. The models were performed and evaluated with different sample sizes and also taking into account the temporal variation of input variables such as burned areas by wildfire. The most significant outcome of this work are: the relevant influence of the sample size on the model results and the strong importance of some environmental factors (e.g. land use and wildfires) for the identification of the depletion zones of extremely rapid shallow landslides.

  18. A Multivariate Analysis of Risk Factors for Diabetic Nephropathy

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    Anthony Shannon

    2007-03-01

    Full Text Available This paper uses multivariate methods on actual data from 267 patients with noninsulin- dependent (Type 2 diabetes mellitus in order to see how the various risk factors can affect the progression of diabetic nephropathy. The approach succeeds in identifying preliminary risk factors such as smoking for males, although the females had higher fasting blood glucose at diagnosis. Not surprisingly, hypertension is common among patients of both sexes and it has an association with proteinuria in female patients in the sample.

  19. Logistic regression for risk factor modelling in stuttering research.

    Science.gov (United States)

    Reed, Phil; Wu, Yaqionq

    2013-06-01

    To outline the uses of logistic regression and other statistical methods for risk factor analysis in the context of research on stuttering. The principles underlying the application of a logistic regression are illustrated, and the types of questions to which such a technique has been applied in the stuttering field are outlined. The assumptions and limitations of the technique are discussed with respect to existing stuttering research, and with respect to formulating appropriate research strategies to accommodate these considerations. Finally, some alternatives to the approach are briefly discussed. The way the statistical procedures are employed are demonstrated with some hypothetical data. Research into several practical issues concerning stuttering could benefit if risk factor modelling were used. Important examples are early diagnosis, prognosis (whether a child will recover or persist) and assessment of treatment outcome. After reading this article you will: (a) Summarize the situations in which logistic regression can be applied to a range of issues about stuttering; (b) Follow the steps in performing a logistic regression analysis; (c) Describe the assumptions of the logistic regression technique and the precautions that need to be checked when it is employed; (d) Be able to summarize its advantages over other techniques like estimation of group differences and simple regression. Copyright © 2012 Elsevier Inc. All rights reserved.

  20. Severe pneumonia in the elderly: a multivariate analysis of risk factors.

    Science.gov (United States)

    Li, Wei; Ding, Cheng; Yin, Shaojun

    2015-01-01

    Pneumonia is the second leading reason for hospitalization of medicare beneficiaries. The mortality rate is high, especially in the elderly. In this study, we aimed to determine the risk factors associated with severe pneumonia in the elderly. Retrospective study was conducted and data of old patients with severe pneumonia were collected. They were divided into two groups: the experiment group (death group) and the control (living group). The general situation, underlying diseases, laboratory tests, types of etiology, imaging analysis and treatment situation of patients were analyzed and compared. Univariate analysis and logistic multivariate regression analysis were used to screen the related and independent risk factors for the diagnosis of severe pneumonia in the elderly. In univariate analysis, there were many factors had statistical significance including chronic kidney disease, electrolyte disturbance, low phosphorus and so on. Result of logistic multivariate regression analysis showed pro-BNP level and serum prealbumin were independent risk factors. In sputum culture, the relevance ratio of acinetobacter baumannii was the highest in gram negative bacteria followed by klebsiella pneumoniae. In gram positive bacteria, the relevance ratio of staphylococcus aureus was the highest. In conclusion, the analysis on risk factors for severe pneumonia has great clinical significance on improving the prognosis.

  1. Some properties on multivariate filter banks with a matrix factorization

    Institute of Scientific and Technical Information of China (English)

    LIAN Qiaofang; XIAO Hongying; CHEN Qiuhui

    2005-01-01

    A class of multivariate filter banks with a matrix factorization has been developed by Chen et al. The main purpose of this paper is to discuss some further properties of this kind of filter bank, such as the completeness, accuracy of the corresponding scaling functions and the relationships with Daubechies' wavelets and the multi-wavelets provided by Chui and Lian. Moreover, some examples are given to show that this kind of filter bank has a higher accuracy for the scaling functions.

  2. Environmental Performance in Countries Worldwide: Determinant Factors and Multivariate Analysis

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    Isabel Gallego-Alvarez

    2014-11-01

    Full Text Available The aim of this study is to analyze the environmental performance of countries and the variables that can influence it. At the same time, we performed a multivariate analysis using the HJ-biplot, an exploratory method that looks for hidden patterns in the data, obtained from the usual singular value decomposition (SVD of the data matrix, to contextualize the countries grouped by geographical areas and the variables relating to environmental indicators included in the environmental performance index. The sample used comprises 149 countries of different geographic areas. The findings obtained from the empirical analysis emphasize that socioeconomic factors, such as economic wealth and education, as well as institutional factors represented by the style of public administration, in particular control of corruption, are determinant factors of environmental performance in the countries analyzed. In contrast, no effect on environmental performance was found for factors relating to the internal characteristics of a country or political factors.

  3. Risk factors for baclofen pump infection in children: a multivariate analysis.

    Science.gov (United States)

    Spader, Heather S; Bollo, Robert J; Bowers, Christian A; Riva-Cambrin, Jay

    2016-06-01

    OBJECTIVE Intrathecal baclofen infusion systems to manage severe spasticity and dystonia are associated with higher infection rates in children than in adults. Factors unique to this population, such as poor nutrition and physical limitations for pump placement, have been hypothesized as the reasons for this disparity. The authors assessed potential risk factors for infection in a multivariate analysis. METHODS Patients who underwent implantation of a programmable pump and intrathecal catheter for baclofen infusion at a single center between January 1, 2000, and March 1, 2012, were identified in this retrospective cohort study. The primary end point was infection. Potential risk factors investigated included preoperative (i.e., demographics, body mass index [BMI], gastrostomy tube, tracheostomy, previous spinal fusion), intraoperative (i.e., surgeon, antibiotics, pump size, catheter location), and postoperative (i.e., wound dehiscence, CSF leak, and number of revisions) factors. Univariate analysis was performed, and a multivariate logistic regression model was created to identify independent risk factors for infection. RESULTS A total of 254 patients were evaluated. The overall infection rate was 9.8%. Univariate analysis identified young age, shorter height, lower weight, dehiscence, CSF leak, and number of revisions within 6 months of pump placement as significantly associated with infection. Multivariate analysis identified young age, dehiscence, and number of revisions as independent risk factors for infection. CONCLUSIONS Young age, wound dehiscence, and number of revisions were independent risk factors for infection in this pediatric cohort. A low BMI and the presence of either a gastrostomy or tracheostomy were not associated with infection and may not be contraindications for this procedure.

  4. Multivariate factor analysis of Girgentana goat milk composition

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    Pietro Giaccone

    2010-01-01

    Full Text Available The interpretation of the several variables that contribute to defining milk quality is difficult due to the high degree of  correlation among them. In this case, one of the best methods of statistical processing is factor analysis, which belongs  to the multivariate groups; for our study this particular statistical approach was employed.  A total of 1485 individual goat milk samples from 117 Girgentana goats, were collected fortnightly from January to July,  and analysed for physical and chemical composition, and clotting properties. Milk pH and tritable acidity were within the  normal range for fresh goat milk. Morning milk yield resulted 704 ± 323 g with 3.93 ± 1.23% and 3.48±0.38% for fat  and protein percentages, respectively. The milk urea content was 43.70 ± 8.28 mg/dl. The clotting ability of Girgentana  milk was quite good, with a renneting time equal to 16.96 ± 3.08 minutes, a rate of curd formation of 2.01 ± 1.63 min-  utes and a curd firmness of 25.08 ± 7.67 millimetres.  Factor analysis was performed by applying axis orthogonal rotation (rotation type VARIMAX; the analysis grouped the  milk components into three latent or common factors. The first, which explained 51.2% of the total covariance, was  defined as “slow milks”, because it was linked to r and pH. The second latent factor, which explained 36.2% of the total  covariance, was defined as “milk yield”, because it is positively correlated to the morning milk yield and to the urea con-  tent, whilst negatively correlated to the fat percentage. The third latent factor, which explained 12.6% of the total covari-  ance, was defined as “curd firmness,” because it is linked to protein percentage, a30 and titatrable acidity. With the aim  of evaluating the influence of environmental effects (stage of kidding, parity and type of kidding, factor scores were anal-  ysed with the mixed linear model. Results showed significant effects of the season of

  5. Factors associated with preterm birth in Cardiff, Wales. I. Univariable and multivariable analysis.

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    Meis, P J; Michielutte, R; Peters, T J; Wells, H B; Sands, R E; Coles, E C; Johns, K A

    1995-08-01

    Our purpose was to examine the associations of demographic, social, and medical factors with risk of preterm birth. By use of the Cardiff Births Survey, a large database of largely homogeneous (white) births in Wales, multivariable analysis by logistic regression examined the relative importance of risk variables associated with preterm birth. Significant independent associations with preterm birth were found (in decreasing order of magnitude) for late pregnancy bleeding, preeclampsia-proteinuria, low maternal weight, low maternal age, early pregnancy bleeding, history of previous stillbirth, smoking, high parity, low or high hemoglobin concentration, history of previous abortion, low social class, bacteriuria, and nulliparity. In this population demographic, social, and medical characteristics of the pregnancies showed significant associations with preterm birth.

  6. Multivariate analysis of risk factors for postoperative complications after laparoscopic liver resection.

    Science.gov (United States)

    Tranchart, Hadrien; Gaillard, Martin; Chirica, Mircea; Ferretti, Stefano; Perlemuter, Gabriel; Naveau, Sylvie; Dagher, Ibrahim

    2015-09-01

    The identification of modifiable perioperative risk factors in patients undergoing laparoscopic liver resection (LLR) should aid the selection of appropriate surgical procedures and thus improve further the outcomes associated with LLR. The aim of this retrospective study was to determine the risk factors for postoperative morbidity associated with laparoscopic liver surgery. All patients who underwent elective LLR between January 1999 and December 2012 were included. Demographic data, preoperative risk factors, operative variables, histological analysis, and postoperative course were recorded. Multivariate analysis was carried out using an unconditional logistic regression model. Between January 1999 and December 2012, 140 patients underwent LLR. There were 56 male patients (40%) and mean age was 57.8 ± 17 years. Postoperative complications were recorded in 30 patients (21.4%). Postoperative morbidity was significantly higher after LLR of malignant tumors [n = 26 (41.3%)] when compared to LLR of benign lesions [n = 4 (5.2%) (P multivariate analysis, operative time [OR = 1.008 (1.003-1.01), P = 0.001] and LLR performed for malignancy [OR = 9.8 (2.5-37.6); P = 0.01] were independent predictors of postoperative morbidity. In the subgroup of patients that underwent LLR for malignancy using the same multivariate model, operative time was the sole independent predictor of postoperative morbidity [OR = 1.008 (1.002-1.013); P = 0.004]. Postoperative complication rate increases by 60% with each additional operative hour during LLR. Therefore, expected operative time should be assessed before and during LLR, especially when dealing with malignant tumor.

  7. Risk Factors for Hypertension After Living Donor Kidney Transplantation in Korea: A Multivariate Analysis.

    Science.gov (United States)

    Yu, H; Kim, H S; Baek, C H; Shin, E H; Cho, H J; Han, D J; Park, S K

    2016-01-01

    Post-transplantation hypertension is very common and is associated with cardiovascular complications and poor graft survival in kidney transplant recipients. This study aimed to identify risk factors for hypertension after living donor kidney transplantation. We retrospectively analyzed patients who underwent renal transplantation between January 2009 and April 2012. Hypertension was defined as the use of antihypertensive medications at 12 months post-transplantation. Student t test and chi-squared test were performed for univariate analysis. Logistic regression analysis was performed for multivariate analysis. Five-hundred thirty-nine patients were enrolled in the analyses. The rate of antihypertensive medication use was 67% at 12 months. In multivariate analysis, male gender (odds ratio [OR], 2.68; 95% confidence interval [CI], 1.55-4.61), pretransplantation hypertension (OR, 4.65; 95% CI, 2.14-10.11), donor hypertension (OR, 3.23; 95% CI, 1.05-9.96), high body mass index (BMI; OR, 1.21; 95% CI, 1.12-1.29), and use of cyclosporine (OR, 2.05; 95% CI, 1.28-3.27) were associated with post-transplantation hypertension. These data show that male recipient, hypertension before transplantation, donor hypertension, high BMI, and cyclosporine use were independent factors associated with hypertension. It would be useful to predict and prevention the hypertension after kidney transplantation. Copyright © 2016 Elsevier Inc. All rights reserved.

  8. Multivariate Analysis of Risk Factors of Cerebral Infarction in 439 Patients Undergoing Thoracic Endovascular Aneurysm Repair.

    Science.gov (United States)

    Kanaoka, Yuji; Ohki, Takao; Maeda, Koji; Baba, Takeshi; Fujita, Tetsuji

    2016-04-01

    The aim of the study is to identify the potential risk factors of cerebral infarction associated with thoracic endovascular aneurysm repair (TEVAR). TEVAR was developed as a less invasive surgical alternative to conventional open repair for thoracic aortic aneurysm treatment. However, outcomes following TEVAR of aortic and distal arch aneurysms remain suboptimal. Cerebral infarction is a major concern during the perioperative period. We included 439 patients who underwent TEVAR of aortic aneurysms at a high-volume teaching hospital between July 2006 and June 2013. Univariate and multivariate logistic regression analyses were performed to identify perioperative cerebral infarction risk factors. Four patients (0.9%) died within 30 days of TEVAR; 17 (3.9%) developed cerebral infarction. In univariate analysis, history of ischemic heart disease and cerebral infarction and concomitant cerebrovascular disease were significantly associated with cerebral infarction. "Shaggy aorta" presence, left subclavian artery coverage, carotid artery debranching, and pull-through wire use were identified as independent risk factors of cerebral infarction. In multivariate analysis, history of ischemic heart disease (odds ratio [OR] 6.49, P = 0.046) and cerebral infarction (OR 43.74, P = 0.031), "shaggy aorta" (OR 30.32, P < 0.001), pull-through wire use during surgery (OR 7.196, P = 0.014), and intraoperative blood loss ≥800 mL (OR 24.31, P = 0.017) were found to be independent risk factors of cerebral infarction. This study identified patient- and procedure-related risk factors of cerebral infarction following TEVAR. These results indicate that patient outcomes could be improved through the identification and management of procedure-related risk factors.

  9. Risk factors for non-alcoholic fatty liver disease: a multivariate analysis

    Directory of Open Access Journals (Sweden)

    PANG Xueqin

    2014-09-01

    Full Text Available ObjectiveTo investigate the risk factors for non-alcoholic fatty liver disease (NAFLD and to provide a basis for the prevention of NAFLD. MethodsA total of 190 patients with NAFLD who visited the First Affiliated Hospital of Soochow University from January 2011 to January 2013 were included in the study. The investigated factors included sex, age, height, weight, dietary habit, smoking and alcohol consumption, educational level, occupation, intensity and duration of physical exercise, bedtime, previous history, and family history. Univariate and multivariate analyses were performed using SPSS 18.0 to determine the risk factors for NAFLD. ResultsThe univariate analysis showed that sex, age, dietary habit, occupation, body mass index (BMI, and educational level were associated with NAFLD (P<0.05. The logistic regression analysis showed that the risk factors for NAFLD were sex (OR=5.692, P=0.029, age (OR=0.423, P=0.041, occupation (OR=0.698, P=0.008, BMI (OR=3.939, P=0.003, educational level (OR=5.463, P=0.030, and dietary habit (OR=9.235, P=0.039. ConclusionNAFLD may be related to many factors, and corresponding preventive measures may reduce the development of NAFLD.

  10. Using Logistic Regression to Identify Risk Factors Causing Rollover Collisions

    Directory of Open Access Journals (Sweden)

    Essam Dabbour

    2012-12-01

    Full Text Available Rollover collisions are among the most serious collisions that usually result in severe injuries or fatalities. In 2009, there were 8,732 fatal rollover collisions in the United States of America that resulted in the death of 9,833 persons. Those numbers represent approximately 28% and 29% of the total numbers of fatal collisions and fatalities, respectively. The main objective of this paper is to examine the impact of different risk factors that may contribute to this type of serious collisions to help develop countermeasures that limit them. To avoid the bias that may be caused by interactions among different drivers, this analysis focuses on rollover related to single-vehicle collisions so that the behavior of the driver of the collided vehicle can be analyzed more effectively. Logistic regression technique is utilized to analyze single-vehicle rollover collisions that occurred on state and interstate highways in the states of Ohio and Washington in 2009. The results obtained from this analysis have the potential to help decision makers identify different strategies to limit the severity of this type of collisions.

  11. Logistic regression.

    Science.gov (United States)

    Nick, Todd G; Campbell, Kathleen M

    2007-01-01

    The Medical Subject Headings (MeSH) thesaurus used by the National Library of Medicine defines logistic regression models as "statistical models which describe the relationship between a qualitative dependent variable (that is, one which can take only certain discrete values, such as the presence or absence of a disease) and an independent variable." Logistic regression models are used to study effects of predictor variables on categorical outcomes and normally the outcome is binary, such as presence or absence of disease (e.g., non-Hodgkin's lymphoma), in which case the model is called a binary logistic model. When there are multiple predictors (e.g., risk factors and treatments) the model is referred to as a multiple or multivariable logistic regression model and is one of the most frequently used statistical model in medical journals. In this chapter, we examine both simple and multiple binary logistic regression models and present related issues, including interaction, categorical predictor variables, continuous predictor variables, and goodness of fit.

  12. Multivariate analysis with LISREL

    CERN Document Server

    Jöreskog, Karl G; Y Wallentin, Fan

    2016-01-01

    This book traces the theory and methodology of multivariate statistical analysis and shows how it can be conducted in practice using the LISREL computer program. It presents not only the typical uses of LISREL, such as confirmatory factor analysis and structural equation models, but also several other multivariate analysis topics, including regression (univariate, multivariate, censored, logistic, and probit), generalized linear models, multilevel analysis, and principal component analysis. It provides numerous examples from several disciplines and discusses and interprets the results, illustrated with sections of output from the LISREL program, in the context of the example. The book is intended for masters and PhD students and researchers in the social, behavioral, economic and many other sciences who require a basic understanding of multivariate statistical theory and methods for their analysis of multivariate data. It can also be used as a textbook on various topics of multivariate statistical analysis.

  13. Research on the influencing factors of reverse logistics carbon footprint under sustainable development.

    Science.gov (United States)

    Sun, Qiang

    2016-12-09

    With the concerns of ecological and circular economy along with sustainable development, reverse logistics has attracted the attention of enterprise. How to achieve sustainable development of reverse logistics has important practical significance of enhancing low carbon competitiveness. In this paper, the system boundary of reverse logistics carbon footprint is presented. Following the measurement of reverse logistics carbon footprint and reverse logistics carbon capacity is provided. The influencing factors of reverse logistics carbon footprint are classified into five parts such as intensity of reverse logistics, energy structure, energy efficiency, reverse logistics output, and product remanufacturing rate. The quantitative research methodology using ADF test, Johansen co-integration test, and impulse response is utilized to interpret the relationship between reverse logistics carbon footprint and the influencing factors more accurately. This research finds that energy efficiency, energy structure, and product remanufacturing rate are more capable of inhibiting reverse logistics carbon footprint. The statistical approaches will help practitioners in this field to structure their reverse logistics activities and also help academics in developing better decision models to reduce reverse logistics carbon footprint.

  14. Critical success factors for reverse logistics in Indian industries

    DEFF Research Database (Denmark)

    Mangla, Sachin Kumar; Govindan, Kannan; Luthra, Sunil

    2016-01-01

    Industries face significant pressures to enact eco-friendly practices in their supply chain due to the constraints of natural resources and growing ecological awareness among customers. Reverse logistics (RL) has been considered as a systematic approach for industries to improve their environment...

  15. An Alternative Flight Software Trigger Paradigm: Applying Multivariate Logistic Regression to Sense Trigger Conditions Using Inaccurate or Scarce Information

    Science.gov (United States)

    Smith, Kelly M.; Gay, Robert S.; Stachowiak, Susan J.

    2013-01-01

    In late 2014, NASA will fly the Orion capsule on a Delta IV-Heavy rocket for the Exploration Flight Test-1 (EFT-1) mission. For EFT-1, the Orion capsule will be flying with a new GPS receiver and new navigation software. Given the experimental nature of the flight, the flight software must be robust to the loss of GPS measurements. Once the high-speed entry is complete, the drogue parachutes must be deployed within the proper conditions to stabilize the vehicle prior to deploying the main parachutes. When GPS is available in nominal operations, the vehicle will deploy the drogue parachutes based on an altitude trigger. However, when GPS is unavailable, the navigated altitude errors become excessively large, driving the need for a backup barometric altimeter to improve altitude knowledge. In order to increase overall robustness, the vehicle also has an alternate method of triggering the parachute deployment sequence based on planet-relative velocity if both the GPS and the barometric altimeter fail. However, this backup trigger results in large altitude errors relative to the targeted altitude. Motivated by this challenge, this paper demonstrates how logistic regression may be employed to semi-automatically generate robust triggers based on statistical analysis. Logistic regression is used as a ground processor pre-flight to develop a statistical classifier. The classifier would then be implemented in flight software and executed in real-time. This technique offers improved performance even in the face of highly inaccurate measurements. Although the logistic regression-based trigger approach will not be implemented within EFT-1 flight software, the methodology can be carried forward for future missions and vehicles.

  16. An Alternative Flight Software Paradigm: Applying Multivariate Logistic Regression to Sense Trigger Conditions using Inaccurate or Scarce Information

    Science.gov (United States)

    Smith, Kelly; Gay, Robert; Stachowiak, Susan

    2013-01-01

    In late 2014, NASA will fly the Orion capsule on a Delta IV-Heavy rocket for the Exploration Flight Test-1 (EFT-1) mission. For EFT-1, the Orion capsule will be flying with a new GPS receiver and new navigation software. Given the experimental nature of the flight, the flight software must be robust to the loss of GPS measurements. Once the high-speed entry is complete, the drogue parachutes must be deployed within the proper conditions to stabilize the vehicle prior to deploying the main parachutes. When GPS is available in nominal operations, the vehicle will deploy the drogue parachutes based on an altitude trigger. However, when GPS is unavailable, the navigated altitude errors become excessively large, driving the need for a backup barometric altimeter to improve altitude knowledge. In order to increase overall robustness, the vehicle also has an alternate method of triggering the parachute deployment sequence based on planet-relative velocity if both the GPS and the barometric altimeter fail. However, this backup trigger results in large altitude errors relative to the targeted altitude. Motivated by this challenge, this paper demonstrates how logistic regression may be employed to semi-automatically generate robust triggers based on statistical analysis. Logistic regression is used as a ground processor pre-flight to develop a statistical classifier. The classifier would then be implemented in flight software and executed in real-time. This technique offers improved performance even in the face of highly inaccurate measurements. Although the logistic regression-based trigger approach will not be implemented within EFT-1 flight software, the methodology can be carried forward for future missions and vehicles

  17. Logistic Regression Analysis of Risk Factors for Stroke%脑卒中危险因素的Logistic分析

    Institute of Scientific and Technical Information of China (English)

    黄炜

    2014-01-01

    Objective To analyze risk factors for stroke of patients in our hospital,in order to prevent and control the occurrence of stroke.Methods Statistical analysis of single-factor and multivariate non-conditional Logistic regression were performed to analyze 133 cases of stroke patients and 87 cases of healthy people.Results Multivariate logistic regression analysis showed that risk factors for stroke of patients was associated with hypertension,diabetes,TIA,lipid abnormality and BMI in our hospital.Conclusion To do primary prevention of risk factors for stroke,which can reduce the incidence rate of stroke.%目的分析来我院就诊的脑卒中患者的危险因素,为有效预防脑卒中的发生提供临床经验。方法通过非条件Logistic回归对133例脑卒中患者和87例健康者进行分析比较。结果多因素Logistic回归分析(前进法)显示院我院脑卒中患者的危险因素与高血压、糖尿病、TIA史、异常血脂和BMI等有相关。结论积极做好脑卒中危险因素的一级预防,能够降低其发生率。

  18. The Fuzzy Grey Relational Analysis of the Factors Influencing Farm Produce Logistics

    Institute of Scientific and Technical Information of China (English)

    Yan; LI; Hongmei; SHAN

    2014-01-01

    The farm produce logistics plays an important role in promoting the agricultural production and prosperity of the rural economy,so grasping the main factors influencing the development of farm produce logistics,is of important significance to accelerating the development of farm produce logistics. The values of identification coefficient in the grey relational analysis are taken based on the experience,so the accuracy of the results is affected. This article uses the improved fuzzy grey relational analysis to analyze the main factors influencing farm produce logistics. The results show that the number of storage companies has a great impact on the development of farm produce logistics,followed by the farm produce processing machinery capacity,rural transport infrastructure,farm produce market conditions and government financial support for agriculture,while the total number of Internet users in rural areas has an limited impact on the development of farm produce logistics.

  19. Factors Associated with Sexual Behavior among Adolescents: A Multivariate Analysis.

    Science.gov (United States)

    Harvey, S. Marie; Spigner, Clarence

    1995-01-01

    A self-administered survey examining multiple factors associated with engaging in sexual intercourse was completed by 1,026 high school students in a classroom setting. Findings suggest that effective interventions to address teenage pregnancy need to utilize a multifaceted approach to the prevention of high-risk behaviors. (JPS)

  20. Phantom pain and risk factors : A multivariate analysis

    NARCIS (Netherlands)

    Dijkstra, PU; Geertzen, JHB; Stewart, R; van der Schans, CP

    2002-01-01

    Phantom pain has been given considerable attention in literature. Phantom Pain reduces quality of life, and patients suffering from phantom pain make heavy use of the medical system. Many risk factors have been identified for phantom Pain in univariate analyses, including phantom sensations, stump P

  1. Phantom pain and risk factors : A multivariate analysis

    NARCIS (Netherlands)

    Dijkstra, PU; Geertzen, JHB; Stewart, R; van der Schans, CP

    2002-01-01

    Phantom pain has been given considerable attention in literature. Phantom Pain reduces quality of life, and patients suffering from phantom pain make heavy use of the medical system. Many risk factors have been identified for phantom Pain in univariate analyses, including phantom sensations, stump P

  2. Risk factors for ventilator-associated events: a case-control multivariable analysis.

    Science.gov (United States)

    Lewis, Sarah C; Li, Lingling; Murphy, Michael V; Klompas, Michael

    2014-08-01

    The Centers for Disease Control and Prevention recently released new surveillance definitions for ventilator-associated events, including the new entities of ventilator-associated conditions and infection-related ventilator-associated complications. Both ventilator-associated conditions and infection-related ventilator-associated complications are associated with prolonged mechanical ventilation and hospital death, but little is known about their risk factors and how best to prevent them. We sought to identify risk factors for ventilator-associated conditions and infection-related ventilator-associated complications. Retrospective case-control study. Medical, surgical, cardiac, and neuroscience units of a tertiary care teaching hospital. Hundred ten patients with ventilator-associated conditions matched to 110 controls without ventilator-associated conditions on the basis of age, sex, ICU type, comorbidities, and duration of mechanical ventilation prior to ventilator-associated conditions. None. We compared cases with controls with regard to demographics, comorbidities, ventilator bundle adherence rates, sedative exposures, routes of nutrition, blood products, fluid balance, and modes of ventilatory support. We repeated the analysis for the subset of patients with infection-related ventilator-associated complications and their controls. Case and control patients were well matched on baseline characteristics. On multivariable logistic regression, significant risk factors for ventilator-associated conditions were mandatory modes of ventilation (odds ratio, 3.4; 95% CI, 1.6-8.0) and positive fluid balances (odds ratio, 1.2 per L positive; 95% CI, 1.0-1.4). Possible risk factors for infection-related ventilator-associated complications were starting benzodiazepines prior to intubation (odds ratio, 5.0; 95% CI, 1.3-29), total opioid exposures (odds ratio, 3.3 per 100 μg fentanyl equivalent/kg; 95% CI, 0.90-16), and paralytic medications (odds ratio, 2.3; 95% CI, 0

  3. Logistic regression models of factors influencing the location of bioenergy and biofuels plants

    Science.gov (United States)

    T.M. Young; R.L. Zaretzki; J.H. Perdue; F.M. Guess; X. Liu

    2011-01-01

    Logistic regression models were developed to identify significant factors that influence the location of existing wood-using bioenergy/biofuels plants and traditional wood-using facilities. Logistic models provided quantitative insight for variables influencing the location of woody biomass-using facilities. Availability of "thinnings to a basal area of 31.7m2/ha...

  4. Preoperative factors predicting poor outcomes following laparoscopic choledochotomy: a multivariate analysis study

    Science.gov (United States)

    Ye, Xiaoming; Hong, Xiaoming; Ni, Kaiyuan; Teng, Xiaoping; Xie, Kaigang

    2013-01-01

    Background Laparoscopic surgery for common bile duct stones varies procedurally from a transcystic approach to laparoscopic choledochotomy (LC) with or without biliary drainage. However, LC is a difficult procedure with higher documented morbidity than the transcystic approach. We retrospectively investigated risk factors for adverse outcomes of LC. Methods We used logistic regression models to assess 4 categories of adverse outcomes: overall, complications, conversion to open operation and failed surgical clearance. We calculated the area under the receiver operating characteristic curve to evaluate diagnostic accuracy. Results We included 201 patients who underwent LC in our analysis. Adverse outcomes occurred in 48 (23.9%) patients, complications occurred in 43 (21.4%), retained stones were observed in 8 (4%), and conversion to laparotomy occurred in 7 (3.5%). Multivariate analysis showed that total bilirubin (BIL) and the presence of medical risk factors (MRFs) were significant predictors of adverse outcomes and complications. We calculated the probability of adverse outcomes (p) using the following formula: logit(p) = 0.977 (MRFs) + 0.014 (BIL) − 2.919. p = EXP (logit(p)) ÷ [1+EXP (logit(p))]. According to their logit(p), all patients were divided into a low-risk group (logit(p) ≤ −1.32, n = 130) and a high-risk group (logit(p) > −1.32, n = 71). Patients in the low-risk group had about a 1 in 10 chance (12 of 130) of adverse outcomes developing. Of the 71 patients in the high-risk group, 36 (50.7%) experienced adverse outcomes. Conclusion High BIL and the presence of MRFs could predict adverse outcomes in patients undergoing LC. PMID:23883491

  5. FACTORS OF LOGISTICS AND FORWARDING SERVICE FORMATION AND DEVELOPMENT

    Directory of Open Access Journals (Sweden)

    Galina Kucheruk

    2016-06-01

    Full Text Available Purpose: Forwarding service is a key part of the system of goods movement and as such it provides realization of numerous services. Providing of new additional and unconventional services to cargo owners by haulers will extend the range of their clients, increase profits from sales, facilitate and accelerate the introduction of new transport technologies, increase stability and strength of relations in the transport market. Methods: We formulated requirements to be met by modern forwarding service. Carriage management should be based on logistics concept and its methods; comprehensive resource optimization of haulers and owners of cargo and other supply chain participants (insurance, financial ones, etc.. Optimization of the space-time chain, even involving freight forwarders (transport intermediaries, is a complex scientific and practical task. Results: We offer directions for development of forwarding additional and non-conventional service for forwarding system of cargo haulage service, which would also provide an opportunity to reduce transport time and increase service level. Discussion: A general scheme of products delivery to consumers contains a significant number of units-particular entities. It is important to analyze not only the position of economic entities in the market, but the features and capabilities of their interaction in major systemic tasks of forwarding service, quality and effective promotion of freight flows

  6. Generalized Dynamic Factor Model + GARCH Exploiting Multivariate Information for Univariate Prediction

    OpenAIRE

    Alessi, Lucia; Barigozzi, Matteo; Capasso, Marco

    2006-01-01

    We propose a new model for multivariate forecasting which combines the Generalized Dynamic Factor Model (GDFM)and the GARCH model. The GDFM, applied to a huge number of series, captures the multivariate information and disentangles the common and the idiosyncratic part of each series of returns. In this financial analysis, both these components are modeled as a GARCH. We compare GDFM+GARCH and standard GARCH performance on samples up to 475 series, predicting both levels and volatility of ret...

  7. Multivariate analysis of factors affecting presence and/or agenesis of third molar tooth.

    Directory of Open Access Journals (Sweden)

    Mohammad Khursheed Alam

    Full Text Available To investigate the presence and/or agenesis of third molar (M3 tooth germs in orthodontics patients in Malaysian Malay and Chinese population and evaluate the relationship between presence and/or agenesis of M3 with different skeletal malocclusion patterns and sagittal maxillomandibular jaw dimensions. Pretreatment records of 300 orthodontic patients (140 males and 160 females, 219 Malaysian Malay and 81 Chinese, average age was 16.27±4.59 were used. Third-molar agenesis was calculated with respect to race, genders, number of missing teeth, jaws, skeletal malocclusion patterns and sagittal maxillomandibular jaw dimensions. The Pearson chi-square test and ANOVA was performed to determine potential differences. Associations between various factors and M3 presence/agenesis groups were assessed using logistic regression analysis. The percentages of subjects with 1 or more M3 agenesis were 30%, 33% and 31% in the Malaysian Malay, Chinese and total population, respectively. Overall prevalence of M3 agenesis in male and female was equal (P>0.05. The frequency of the agenesis of M3s is greater in maxilla as well in the right side (P>0.05. The prevalence of M3 agenesis in those with a Class III and Class II malocclusion was relatively higher in Malaysian Malay and Malaysian Chinese population respectively. Using stepwise regression analyses, significant associations were found between Mx (P<0.05 and ANB (P<0.05 and M3 agenesis. This multivariate analysis suggested that Mx and ANB were significantly correlated with the M3 presence/agenesis.

  8. Personal, social, and game-related correlates of active and non-active gaming among dutch gaming adolescents: survey-based multivariable, multilevel logistic regression analyses.

    Science.gov (United States)

    Simons, Monique; de Vet, Emely; Chinapaw, Mai Jm; de Boer, Michiel; Seidell, Jacob C; Brug, Johannes

    2014-04-04

    Playing video games contributes substantially to sedentary behavior in youth. A new generation of video games-active games-seems to be a promising alternative to sedentary games to promote physical activity and reduce sedentary behavior. At this time, little is known about correlates of active and non-active gaming among adolescents. The objective of this study was to examine potential personal, social, and game-related correlates of both active and non-active gaming in adolescents. A survey assessing game behavior and potential personal, social, and game-related correlates was conducted among adolescents (12-16 years, N=353) recruited via schools. Multivariable, multilevel logistic regression analyses, adjusted for demographics (age, sex and educational level of adolescents), were conducted to examine personal, social, and game-related correlates of active gaming ≥1 hour per week (h/wk) and non-active gaming >7 h/wk. Active gaming ≥1 h/wk was significantly associated with a more positive attitude toward active gaming (OR 5.3, CI 2.4-11.8; Pgames (OR 0.30, CI 0.1-0.6; P=.002), a higher score on habit strength regarding gaming (OR 1.9, CI 1.2-3.2; P=.008) and having brothers/sisters (OR 6.7, CI 2.6-17.1; Pgaming and a little bit lower score on game engagement (OR 0.95, CI 0.91-0.997; P=.04). Non-active gaming >7 h/wk was significantly associated with a more positive attitude toward non-active gaming (OR 2.6, CI 1.1-6.3; P=.035), a stronger habit regarding gaming (OR 3.0, CI 1.7-5.3; Pgaming (OR 3.3, CI 1.46-7.53; P=.004), and a more positive image of a non-active gamer (OR 2, CI 1.07-3.75; P=.03). Various factors were significantly associated with active gaming ≥1 h/wk and non-active gaming >7 h/wk. Active gaming is most strongly (negatively) associated with attitude with respect to non-active games, followed by observed active game behavior of brothers and sisters and attitude with respect to active gaming (positive associations). On the other hand, non

  9. Dynamic factor analysis in the frequency domain: causal modeling of multivariate psychophysiological time series

    NARCIS (Netherlands)

    Molenaar, P.C.M.

    1987-01-01

    Outlines a frequency domain analysis of the dynamic factor model and proposes a solution to the problem of constructing a causal filter of lagged factor loadings. The method is illustrated with applications to simulated and real multivariate time series. The latter applications involve topographic a

  10. Dissection of genomic correlation matrices of US Holsteins using multivariate factor analysis

    Science.gov (United States)

    Aim of the study was to compare correlation matrices between direct genomic predictions for 31 production, fitness and conformation traits both at genomic and chromosomal level in US Holstein bulls. Multivariate factor analysis was used to quantify basic features of correlation matrices. Factor extr...

  11. Factors Influencing ICT Adoption in Halal Transportations: A Case Study of Malaysian Halal Logistics Service Providers

    Directory of Open Access Journals (Sweden)

    Mohd Iskandar Illyas Tan

    2012-01-01

    Full Text Available The purpose of this study is i to investigate the factors that influence the adoption of Information and Communication Technology (ICT in Halal transportations and logistics and ii to develop an ICT adoption framework for Halal logistic service providers (LSPs. The Halal LSPs selected for the study currently used ICT service platforms, such as accounting and management system for Halal logistic business. The study categorizes the factors influencing the adoption decision and process by LSPs into four groups: technological related factors, Halal assurance related factors, organizational and environmental related factors. The major contribution in this study is the discovery that technological related factors (ICT compatibility with Halal requirement and Halal assurance related factors are the most affecting factors among the Halal LSPs applying ICT for Halal performances control in transportations operation. Among the environmental related factors, ICT requirement for monitoring Halal included in Halal Logistic Standard on Transportation (MS2400:2010 are the most influencing factors in the adoption of ICT with the support of the government. In addition, the government related factors are very important in the reducing the main barriers and the creation of the atmosphere of ICT adoption in Halal LSP sector.

  12. Risk Factors of Falls in Community-Dwelling Older Adults: Logistic Regression Tree Analysis

    Science.gov (United States)

    Yamashita, Takashi; Noe, Douglas A.; Bailer, A. John

    2012-01-01

    Purpose of the Study: A novel logistic regression tree-based method was applied to identify fall risk factors and possible interaction effects of those risk factors. Design and Methods: A nationally representative sample of American older adults aged 65 years and older (N = 9,592) in the Health and Retirement Study 2004 and 2006 modules was used.…

  13. Risk Factors of Falls in Community-Dwelling Older Adults: Logistic Regression Tree Analysis

    Science.gov (United States)

    Yamashita, Takashi; Noe, Douglas A.; Bailer, A. John

    2012-01-01

    Purpose of the Study: A novel logistic regression tree-based method was applied to identify fall risk factors and possible interaction effects of those risk factors. Design and Methods: A nationally representative sample of American older adults aged 65 years and older (N = 9,592) in the Health and Retirement Study 2004 and 2006 modules was used.…

  14. Risk Factors for Birth Defects:A Conditional Logistic Regression Analysis of a Case-Control Study in Guang-dong Province of China

    Institute of Scientific and Technical Information of China (English)

    王志瑾; 穆荔

    1999-01-01

    In order to study risk factors and their association with birth defects,data were collected from 329 cases and 329 controls in 38 hospitals in Guangdong Province of China in 1988.Information was obtained from the same questionnaire(23 risk factors listed)of cases and controls.We used a multivariate logistic model,which described variables significantly increased risk of birth defects.The risk factors included maternal educa-tional levels,medicine taken during pregnancy and antenatal care.It was suggested to strengthen antenatal care was the main preventive measure against birth defects.

  15. Multivariate Analysis of Factors Associated With Axial Symptoms in Unilateral Expansive Open-Door Cervical Laminoplasty With Miniplate Fixation.

    Science.gov (United States)

    Chen, Hua; Liu, Hao; Deng, Yuxiao; Gong, Quan; Li, Tao; Song, Yueming

    2016-01-01

    Retrospective case-control study.Unilateral expansive open-door cervical laminoplasty with miniplate fixation is an efficient and increasing popular surgery for multilevel cervical spondylotic myelopathy. Axial symptoms are the most frequent complaints after cervical laminoplasty. But the mechanisms have not been fully clarified yet.The objective of this study is to compare the clinical and radiologic data between patients with or without axial symptoms and to investigate the factors associated with axial symptoms by multivariate analysis in cervical laminoplasty with miniplate fixation.A total of 129 patients who underwent cervical laminoplasty with miniplate fixation were comprised from August 2009 to March 2014. Patients were grouped according to whether they suffered from postoperative axial symptoms (PA) or not (NA). The clinical data including gender, age, duration of symptoms, diagnosis type, medical comorbidity, operative level, blood loss, operative time, pre- and post-Japanese Orthopedic Association (JOA) score, JOA recovery rates, and other complications were recorded. The radiologic data including cervical canal diameter, C2-7 Cobb angle, cervical range of motion (ROM), cross-sectional area, open angle, hinge union, and facet joint destroyed would be measured according to X-ray plain and CT scan images. The univariate analysis and multivariate logistic regression analysis were performed.There were 39 patients in PA group and 90 patients in NA group. Both groups gained significant JOA improvement postoperatively (P  0.05). The multivariate analysis showed that the negative change of cervical ROM (OR = 1.062, P = 0.047) and facet joints destroyed (OR = 0.661, P = 0.024) were related to axial symptoms.The change of cervical ROM and facet joints destroyed by miniscrews might be associated with axial symptoms after cervical laminoplasty with miniplate fixation. Cervical spine surgeons should carefully operate to decrease the injury of

  16. Risk factors for incidental durotomy during lumbar surgery: a retrospective study by multivariate analysis.

    Science.gov (United States)

    Chen, Zhixiang; Shao, Peng; Sun, Qizhao; Zhao, Dong

    2015-03-01

    The purpose of the present study was to use a prospectively collected data to evaluate the rate of incidental durotomy (ID) during lumbar surgery and determine the associated risk factors by using univariate and multivariate analysis. We retrospectively reviewed 2184 patients who underwent lumbar surgery from January 1, 2009 to December 31, 2011 at a single hospital. Patients with ID (n=97) were compared with the patients without ID (n=2019). The influences of several potential risk factors that might affect the occurrence of ID were assessed using univariate and multivariate analyses. The overall incidence of ID was 4.62%. Univariate analysis demonstrated that older age, diabetes, lumbar central stenosis, posterior approach, revision surgery, prior lumber surgery and minimal invasive surgery are risk factors for ID during lumbar surgery. However, multivariate analysis identified older age, prior lumber surgery, revision surgery, and minimally invasive surgery as independent risk factors. Older age, prior lumber surgery, revision surgery, and minimal invasive surgery were independent risk factors for ID during lumbar surgery. These findings may guide clinicians making future surgical decisions regarding ID and aid in the patient counseling process to alleviate risks and complications. Copyright © 2015 Elsevier B.V. All rights reserved.

  17. Analyzing Multiple Multivariate Time Series Data Using Multilevel Dynamic Factor Models.

    Science.gov (United States)

    Song, Hairong; Zhang, Zhiyong

    2014-01-01

    Multivariate time series data offer researchers opportunities to study dynamics of various systems in social and behavioral sciences. Dynamic factor model (DFM), as an idiographic approach for studying intraindividual variability and dynamics, has typically been applied to time series data obtained from a single unit. When multivariate time series data are collected from multiple units, how to synchronize dynamical information becomes a silent issue. To address this issue, the current study presented a multilevel dynamic factor model (MDFM) that analyzes multiple multivariate time series in multilevel SEM frameworks. MDFM not only disentangles within- and between-person variability but also models dynamics of the intraindividual processes. To illustrate the uses of MDFMs, we applied lag0, lag1, and lag2 MDFMs to empirical data on affect collected from 205 dating couples who had at least 50 consecutive days of observations. We also considered a model extension where the dynamical coefficients were allowed to be randomly varying in the population. The empirical analysis yielded interesting findings regarding affect regulation and coregulation within couples, demonstrating promising uses of MDFMs in analyzing multiple multivariate time series. In the end, we discussed a number of methodological issues in the applications of MDFMs and pointed out possible directions for future research.

  18. Recognition and Empirical Research on Key Influencing Factors of Low Carbon Development for Logistics Company

    Directory of Open Access Journals (Sweden)

    Xiang-Yun Duan

    2015-01-01

    Full Text Available The questionnaire paper used was work out by modifying the existing mature research scale and interviewing the experts and enterprises. The purpose of this study is to explore the key influencing factors of low carbon development for logistics companies by using the data from the questionnaire, which might contribute to further investigation of low carbon development pathway. Through correlation and stepwise regression analysis, differences between influencing factors and impact-degree were found since specific environmental behaviors of low carbon logistics might vary significantly. The driving factor of low carbon input comes from external points such as government and public external pressure, so the low carbon input is driven by an outside force. Yet, low carbon operation is significantly affected by internal factors such as low carbon behavior capacity, which is driven by an inside force.

  19. Forecasting Multivariate Volatility using the VARFIMA Model on Realized Covariance Cholesky Factors

    DEFF Research Database (Denmark)

    Halbleib, Roxana; Voev, Valeri

    2011-01-01

    This paper analyzes the forecast accuracy of the multivariate realized volatility model introduced by Chiriac and Voev (2010), subject to different degrees of model parametrization and economic evaluation criteria. Bymodelling the Cholesky factors of the covariancematrices, the model generates...... positive definite, but biased covariance forecasts. In this paper, we provide empirical evidence that parsimonious versions of the model generate the best covariance forecasts in the absence of bias correction. Moreover, we show by means of stochastic dominance tests that any risk averse investor...

  20. Controller synthesis for flexible spacecraft using multivariable loop-shaping and factorization methods

    Science.gov (United States)

    Joshi, Suresh M.

    1987-01-01

    The problem of designing fine-pointing controllers is considered for large, flexible space structures using modern multivariable synthesis methods. The first method is an iterative procedure which utilizes frequency-domain singular-value techniques, and is found to yield satisfactory performance and robustness. For the second method, which is based on coprime factorizations, a particular bicoprime is obtained, and the steps in the design process are described. This method is still under development.

  1. Multivariate analysis of prognostic factors for idiopathic sudden sensorineural hearing loss in children.

    Science.gov (United States)

    Chung, Jae Ho; Cho, Seok Hyun; Jeong, Jin Hyeok; Park, Chul Won; Lee, Seung Hwan

    2015-09-01

    To evaluate clinical characteristics and possible associated factors of idiopathic sudden sensorineural hearing loss (ISSNHL) in children using univariate and multivariate analyses. A retrospective case series with comparisons. From January 2007 to December 2013, medical records of 37 pediatric ISSNHL patients were reviewed to assess hearing recovery rate and examine factors associated with prognosis (gender; side of hearing loss; opposite side hearing loss; treatment onset; presence of vertigo, tinnitus, and ear fullness; initial hearing threshold), using univariate and multivariate analysis, and compare them with 276 adult ISSNHL patients. Pediatric patients comprised only 6.6% of pediatric/adult cases of ISSNHL, and those below 10 years old were only 0.7%. The overall recovery rates (complete and partial) of the pediatric and adult patients were 57.4% and 47.2%, respectively. The complete recovery rate of the pediatric group (46.6%) was higher than that of the adult group (30.8%, P = .040). According to multivariate analysis, absence of tinnitus, later onset of treatment, and higher hearing threshold at initial presentation were associated with a poor prognosis in pediatric ISSNHL. The recovery rate of ISSNHL in pediatric patients is higher than in adults, and the presence of tinnitus and earlier treatment onset is associated with favorable outcomes. 4. © 2015 The American Laryngological, Rhinological and Otological Society, Inc.

  2. A Novel Multivariate Model Based on Dominant Factor for Laser-induced Breakdown Spectroscopy Measurements

    CERN Document Server

    Wang, Zhe; Li, Lizhi; Ni, Weidou; Li, Zheng

    2010-01-01

    This paper presents a new approach of applying partial least squares method combined with a physical principle based dominant factor. The characteristic line intensity of the specific element was taken to build up the dominant factor to reflect the major elemental concentration and partial least squares (PLS) approach was then applied to further improve the model accuracy. The deviation evolution of characteristic line intensity from the ideal condition was depicted and according to the deviation understanding, efforts were taken to model the non-linear self-absorption and inter-element interference effects to improve the accuracy of dominant factor model. With a dominant factor to carry the main quantitative information, the novel multivariate model combines advantages of both the conventional univariate and PLS models and partially avoids the overuse of the unrelated noise in the spectrum for PLS application. The dominant factor makes the combination model more robust over a wide concentration range and PLS...

  3. Multinomial Logistic Regression Predicted Probability Map To Visualize The Influence Of Socio-Economic Factors On Breast Cancer Occurrence in Southern Karnataka

    Science.gov (United States)

    Madhu, B.; Ashok, N. C.; Balasubramanian, S.

    2014-11-01

    Multinomial logistic regression analysis was used to develop statistical model that can predict the probability of breast cancer in Southern Karnataka using the breast cancer occurrence data during 2007-2011. Independent socio-economic variables describing the breast cancer occurrence like age, education, occupation, parity, type of family, health insurance coverage, residential locality and socioeconomic status of each case was obtained. The models were developed as follows: i) Spatial visualization of the Urban- rural distribution of breast cancer cases that were obtained from the Bharat Hospital and Institute of Oncology. ii) Socio-economic risk factors describing the breast cancer occurrences were complied for each case. These data were then analysed using multinomial logistic regression analysis in a SPSS statistical software and relations between the occurrence of breast cancer across the socio-economic status and the influence of other socio-economic variables were evaluated and multinomial logistic regression models were constructed. iii) the model that best predicted the occurrence of breast cancer were identified. This multivariate logistic regression model has been entered into a geographic information system and maps showing the predicted probability of breast cancer occurrence in Southern Karnataka was created. This study demonstrates that Multinomial logistic regression is a valuable tool for developing models that predict the probability of breast cancer Occurrence in Southern Karnataka.

  4. Graft-versus-host disease after orthotopic liver transplantation: multivariate analysis of risk factors.

    Science.gov (United States)

    Elfeki, Mohamed A; Pungpapong, Surakit; Genco, Petrina V; Nakhleh, Raouf E; Nguyen, Justin H; Harnois, Denise M

    2015-12-01

    Graft-versus-host disease (GVHD) is a rare, fatal complication following orthotopic liver transplantation (OLT). To date, several risk factors have been proposed, but reports on these factors have been inconclusive. This is a retrospective, case-control study of prospectively collected data from 2775 OLTs performed at our institution. Eight cases of GVHD after OLT were diagnosed on the basis of the patient's clinical characteristics, and the findings were confirmed with skin and colonic biopsies. Each case was matched to three controls based on the diagnosis of liver disease, recipient's age, and blood group. Univariate and multivariate analyses were performed to identify risk factors associated with the development of GVHD after OLT. The univariate and multivariate analyses identified two main risk factors associated with development of GVHD in OLT recipients, a difference between recipient and donor age of >20 yr, and any human leukocyte antigen class I matches. Taking these two risk factors into consideration while matching prospective donors and recipients may reduce further incidence of GVHD in OLT patients. However, further studies are recommended to validate these findings. © 2015 John Wiley & Sons A/S. Published by John Wiley & Sons Ltd.

  5. MULTIPLE LOGISTIC REGRESSION MODEL TO PREDICT RISK FACTORS OF ORAL HEALTH DISEASES

    Directory of Open Access Journals (Sweden)

    Parameshwar V. Pandit

    2012-06-01

    Full Text Available Purpose: To analysis the dependence of oral health diseases i.e. dental caries and periodontal disease on considering the number of risk factors through the applications of logistic regression model. Method: The cross sectional study involves a systematic random sample of 1760 permanent dentition aged between 18-40 years in Dharwad, Karnataka, India. Dharwad is situated in North Karnataka. The mean age was 34.26±7.28. The risk factors of dental caries and periodontal disease were established by multiple logistic regression model using SPSS statistical software. Results: The factors like frequency of brushing, timings of cleaning teeth and type of toothpastes are significant persistent predictors of dental caries and periodontal disease. The log likelihood value of full model is –1013.1364 and Akaike’s Information Criterion (AIC is 1.1752 as compared to reduced regression model are -1019.8106 and 1.1748 respectively for dental caries. But, the log likelihood value of full model is –1085.7876 and AIC is 1.2577 followed by reduced regression model are -1019.8106 and 1.1748 respectively for periodontal disease. The area under Receiver Operating Characteristic (ROC curve for the dental caries is 0.7509 (full model and 0.7447 (reduced model; the ROC for the periodontal disease is 0.6128 (full model and 0.5821 (reduced model. Conclusions: The frequency of brushing, timings of cleaning teeth and type of toothpastes are main signifi cant risk factors of dental caries and periodontal disease. The fitting performance of reduced logistic regression model is slightly a better fit as compared to full logistic regression model in identifying the these risk factors for both dichotomous dental caries and periodontal disease.

  6. Identifying Key Factors for Introducing GPS-Based Fleet Management Systems to the Logistics Industry

    Directory of Open Access Journals (Sweden)

    Yi-Chung Hu

    2015-01-01

    Full Text Available The rise of e-commerce and globalization has changed consumption patterns. Different industries have different logistical needs. In meeting needs with different schedules logistics play a key role. Delivering a seamless service becomes a source of competitive advantage for the logistics industry. Global positioning system-based fleet management system technology provides synergy to transport companies and achieves many management goals such as monitoring and tracking commodity distribution, energy saving, safety, and quality. A case company, which is a subsidiary of a very famous food and retail conglomerate and operates the largest shipping line in Taiwan, has suffered from the nonsmooth introduction of GPS-based fleet management systems in recent years. Therefore, this study aims to identify key factors for introducing related systems to the case company. By using DEMATEL and ANP, we can find not only key factors but also causes and effects among key factors. The results showed that support from executives was the most important criterion but it has the worst performance among key factors. It is found that adequate annual budget planning, enhancement of user intention, and collaboration with consultants with high specialty could be helpful to enhance the faith of top executives for successfully introducing the systems to the case company.

  7. Logistical Factors Influencing Cold Ischemia Times in Deceased Donor Kidney Transplants.

    Science.gov (United States)

    Shrestha, Sussie; Bradbury, Lisa; Boal, Matthew; Blackmur, James P; Watson, Christopher J E; Taylor, Craig J; Forsythe, John L R; Johnson, Rachel; Marson, Lorna P

    2016-02-01

    Prolonged cold ischemia time (CIT) is associated with a significant risk of short- and long-term graft failure in deceased donor kidney transplants across the world. The aim of this prospective longitudinal study was to determine the importance of logistical factors on CIT. Data on 1763 transplants were collected prospectively over 14 months from personnel in 16 transplant centers, 19 histocompatibility and immunogenetics laboratories, transport providers, and National Health Service Blood and Transplant. The overall mean CIT was 13.8 hours, with significant center variation (P theater access contributes significantly to increased CIT. This study identifies logistical factors relating to donor, transport, crossmatching, recipient, and theater that impact significantly on CIT in deceased donor renal transplantation, some of which are modifiable; attention should be focussed on addressing all of these.

  8. An order insertion scheduling model of logistics service supply chain considering capacity and time factors.

    Science.gov (United States)

    Liu, Weihua; Yang, Yi; Wang, Shuqing; Liu, Yang

    2014-01-01

    Order insertion often occurs in the scheduling process of logistics service supply chain (LSSC), which disturbs normal time scheduling especially in the environment of mass customization logistics service. This study analyses order similarity coefficient and order insertion operation process and then establishes an order insertion scheduling model of LSSC with service capacity and time factors considered. This model aims to minimize the average unit volume operation cost of logistics service integrator and maximize the average satisfaction degree of functional logistics service providers. In order to verify the viability and effectiveness of our model, a specific example is numerically analyzed. Some interesting conclusions are obtained. First, along with the increase of completion time delay coefficient permitted by customers, the possible inserting order volume first increases and then trends to be stable. Second, supply chain performance reaches the best when the volume of inserting order is equal to the surplus volume of the normal operation capacity in mass service process. Third, the larger the normal operation capacity in mass service process is, the bigger the possible inserting order's volume will be. Moreover, compared to increasing the completion time delay coefficient, improving the normal operation capacity of mass service process is more useful.

  9. An Order Insertion Scheduling Model of Logistics Service Supply Chain Considering Capacity and Time Factors

    Directory of Open Access Journals (Sweden)

    Weihua Liu

    2014-01-01

    Full Text Available Order insertion often occurs in the scheduling process of logistics service supply chain (LSSC, which disturbs normal time scheduling especially in the environment of mass customization logistics service. This study analyses order similarity coefficient and order insertion operation process and then establishes an order insertion scheduling model of LSSC with service capacity and time factors considered. This model aims to minimize the average unit volume operation cost of logistics service integrator and maximize the average satisfaction degree of functional logistics service providers. In order to verify the viability and effectiveness of our model, a specific example is numerically analyzed. Some interesting conclusions are obtained. First, along with the increase of completion time delay coefficient permitted by customers, the possible inserting order volume first increases and then trends to be stable. Second, supply chain performance reaches the best when the volume of inserting order is equal to the surplus volume of the normal operation capacity in mass service process. Third, the larger the normal operation capacity in mass service process is, the bigger the possible inserting order’s volume will be. Moreover, compared to increasing the completion time delay coefficient, improving the normal operation capacity of mass service process is more useful.

  10. An Order Insertion Scheduling Model of Logistics Service Supply Chain Considering Capacity and Time Factors

    Science.gov (United States)

    Yang, Yi; Wang, Shuqing; Liu, Yang

    2014-01-01

    Order insertion often occurs in the scheduling process of logistics service supply chain (LSSC), which disturbs normal time scheduling especially in the environment of mass customization logistics service. This study analyses order similarity coefficient and order insertion operation process and then establishes an order insertion scheduling model of LSSC with service capacity and time factors considered. This model aims to minimize the average unit volume operation cost of logistics service integrator and maximize the average satisfaction degree of functional logistics service providers. In order to verify the viability and effectiveness of our model, a specific example is numerically analyzed. Some interesting conclusions are obtained. First, along with the increase of completion time delay coefficient permitted by customers, the possible inserting order volume first increases and then trends to be stable. Second, supply chain performance reaches the best when the volume of inserting order is equal to the surplus volume of the normal operation capacity in mass service process. Third, the larger the normal operation capacity in mass service process is, the bigger the possible inserting order's volume will be. Moreover, compared to increasing the completion time delay coefficient, improving the normal operation capacity of mass service process is more useful. PMID:25276851

  11. Meteorological Factor Analysis of Freezing Injury to Overwintering Tea Based on Logistic Regression%基于 Logistic 回归的茶树越冬期冻害气象因素分析

    Institute of Scientific and Technical Information of China (English)

    段永春

    2015-01-01

    Thirty -one meteorological factors were chosed as dependent variable from 45 years of meteor-ological data in 3 major tea producing areas of Qingdao,Rizhao and Linyi in Shandong Provingce.Occurrence or not of the freezing injury during overwintering was chosed as independent variable.The single -factor logis-tic regression analysis was conducted,and 9 meteorological factors with statistical significance were chosed for multivariate logistic regression analysis.Then the logistic model for the heavy freezing injury occurrence of o-verwintering tea trees was established and evaluated.The results showed that the average air temperature in January,average air temperature in July of last year,rainfall in November of last year,average air temperature in November of last year,relative air humidity in February were the main determinants that caused the heavy freezing injury to the overwintering tea tree.%从山东日照、青岛、临沂三个主茶区45年的气象资料中,选择可能导致茶树越冬期大冻害形成的31个气象因子作为自变量,以越冬期大冻害发生有无作为因变量,进行单因素 Logistic 回归分析,从中选出9个有统计学意义的气象因子进行多因素 Logistic 回归分析,建立茶树越冬期大冻害发生的 Logistic 回归模型,并对模型进行评价。结果显示,1月平均气温、上年7月平均气温、上年11月降水量、上年11月平均气温、2月空气相对湿度五个气象因子决定了茶树越冬期大冻害的发生,其中1月平均气温是主要因子。

  12. Risk Factors for Medical Complication after Cervical Spine Surgery: a multivariate analysis of 582 patients

    Science.gov (United States)

    Lee, Michael J.; Konodi, Mark A.; Cizik, Amy M.; Weinreich, Mark A.; Bransford, Richard J.; Bellabarba, Carlo; Chapman, Jens

    2012-01-01

    Study Design Multivariate analysis of prospectively collected registry data Objective Using multivariate analysis, to determine significant risk factors for medical complication after cervical spine surgery. Summary of Background Data Several studies have examined the occurrence of medical complication after spine surgery. However many of these studies have been done utilizing large national databases. While these allow for analysis of thousands of patients, potentially influential co-variates are not accounted for in these retrospective studies. Furthermore, the accuracy of these retrospective data collection in these databases has been called into question. Methods The Spine End Results Registry (2003–2004) is a collection prospectively collected data on all patients who underwent spine surgery at our two institutions. Extensive demographic and medical information were prospectively recorded as described previously by Mirza et al. Complications were defined in detail a priori and were prospectively recorded for at least 2 years after surgery. We analyzed risk factors for medical complication after lumbar spine surgery using univariate and multivariate analysis. Results We analayzed data from 582 patients who met out inclusion criteria. The cumulative incidences of complication after cervical spine surgery per organ system are as follows: cardiac – 8.4%, pulmonary – 13%, gastrointestinal – 3.9%, neurological – 7.4%, hematological – 10.8% and urologic complications – 9.2%. The occurrence of cardiac or respiratory complication after cervical spine surgery was significantly associated with death within 2 years (RR 4.32, 6.43 respectively). Relative risk values with 95% confidence intervals and p values are listed individually in Tables 2 and 3. Conclusion Risk factors identified in this study can be beneficial to clinicians and patients alike when considering surgical treatment of the cervical spine. Future analyses and models that predict the

  13. Multivariate analysis of perioperative risk factors associated with postoperative pulmonary complications in elder patients undergoing upper abdominal surgery

    Directory of Open Access Journals (Sweden)

    Wen-bing LI

    2011-06-01

    Full Text Available Objective To explore the correlation between the perioperative risk factors and postoperative pulmonary complications(POPC in elder patients undergoing upper abdominal surgery.Methods A retrospective survey of 169 elder patients(age over 60 years,received elective upper abdominal surgery under general anesthesia from Jan.1,2006 to Jan.1,2010 was conducted.The perioperative factors influencing respiratory function were evaluated,including clinical manifestations,chest X-ray,pulmonary function,arterial blood gas analysis,duration of anesthesia,incision type,duration of nasogastric tube and ambulation time.Meanwhile,the relationship between POPC and the factors mentioned above was analyzed.Results POPC were seen to occur in 77 of the 169 patients(45.6%,and the most common complication was pneumonia(20 cases,followed by atelectasis(18 cases,tracheobronchitis or acute exacerbations of chronic bronchitis(17 cases,bronchospasm(15 cases,acute respiratory failure(5 cases and pulmonary embolism(2 cases.Multivariate logistic analysis showed that the postoperative nasogastric intubation,preoperative respiratory symptoms,decreased forced expiratory volume in 1st second/forced vital capacity(FEV1/FVC and longer duration of anesthesia were the valuable risk factors for prediction of POPC.Conclusions It is recommend that a detailed preoperative pulmonary examination and pulmonary function test in elder patients who are going to have upper abdominal surgery should be done to identify the risk for POPC.Preoperative intervention therapy may be helpful to improve pulmonary function,decrease the incidence of POPC and lower mortality of the patients.

  14. Reverse logistics

    NARCIS (Netherlands)

    M.P. de Brito (Marisa); S.D.P. Flapper; R. Dekker (Rommert)

    2002-01-01

    textabstractThis paper gives an overview of scientific literature that describes and discusses cases of reverse logistics activities in practice. Over sixty case studies are considered. Based on these studies we are able to indicate critical factors for the practice of reverse logistics. In addi

  15. Forecasting Multivariate Volatility using the VARFIMA Model on Realized Covariance Cholesky Factors

    DEFF Research Database (Denmark)

    Halbleib, Roxana; Voev, Valeri

    2011-01-01

    This paper analyzes the forecast accuracy of the multivariate realized volatility model introduced by Chiriac and Voev (2010), subject to different degrees of model parametrization and economic evaluation criteria. Bymodelling the Cholesky factors of the covariancematrices, the model generates...... positive definite, but biased covariance forecasts. In this paper, we provide empirical evidence that parsimonious versions of the model generate the best covariance forecasts in the absence of bias correction. Moreover, we show by means of stochastic dominance tests that any risk averse investor......, regardless of the type of utility function or return distribution, would be better-off from using this model than from using some standard approaches....

  16. Comparing the importance of prognostic factors in Cox and logistic regression using SAS.

    Science.gov (United States)

    Heinze, Georg; Schemper, Michael

    2003-06-01

    Two SAS macro programs are presented that evaluate the relative importance of prognostic factors in the proportional hazards regression model and in the logistic regression model. The importance of a prognostic factor is quantified by the proportion of variation in the outcome attributable to this factor. For proportional hazards regression, the program %RELIMPCR uses the recently proposed measure V to calculate the proportion of explained variation (PEV). For the logistic model, the R(2) measure based on squared raw residuals is used by the program %RELIMPLR. Both programs are able to compute marginal and partial PEV, to compare PEVs of factors, of groups of factors, and even to compare PEVs of different models. The programs use a bootstrap resampling scheme to test differences of the PEVs of different factors. Confidence limits for P-values are provided. The programs further allow to base the computation of PEV on models with shrinked or bias-corrected parameter estimates. The SAS macros are freely available at www.akh-wien.ac.at/imc/biometrie/relimp

  17. Multivariate analysis of prognostic factors for salvage nasopharyngectomy via the maxillary swing approach.

    Science.gov (United States)

    Chan, Jimmy Yu Wai; To, Victor Shing Howe; Chow, Velda Ling Yu; Wong, Stanley Thian Sze; Wei, William Ignace

    2014-07-01

    The purpose of this study was to investigate the prognostic factors for salvage nasopharyngectomy. A retrospective review was conducted on maxillary swing nasopharyngectomy performed between 1998 and 2010. Univariate and multivariate analyses identified prognostic factors affecting actuarial local tumor control and overall survival. The median follow-up duration was 52 months. Among the 268 patients, 79.1% had clear resection margins. The 5-year actuarial local tumor control and overall survival was 74% and 62.1%, respectively. On multivariate analysis, tumor size, resection margin status, and gross tumor in the sphenoid sinus were independent prognostic factors for local tumor control. For overall survival, resection margin status, synchronous cervical nodal recurrence, and cavernous sinus invasion had a negative influence on overall survival after surgery. Extent of nasopharyngectomy should be tailored to the individual tumor to achieve clear resection margins. Cavernous sinus invasion is associated with poor survival outcome, and detailed counseling and meticulous surgical planning is crucial in such circumstances. Copyright © 2014 Wiley Periodicals, Inc.

  18. Multivariate analysis of risk factors for QT prolongation following subarachnoid hemorrhage

    Science.gov (United States)

    Fukui, Shinji; Katoh, Hiroshi; Tsuzuki, Nobusuke; Ishihara, Shoichiro; Otani, Naoki; Ooigawa, Hidetoshi; Toyooka, Terushige; Ohnuki, Akira; Miyazawa, Takahito; Nawashiro, Hiroshi; Shima, Katsuji

    2003-01-01

    Background Subarachnoid hemorrhage (SAH) often causes a prolongation of the corrected QT (QTc) interval during the acute phase. The aim of the present study was to examine independent risk factors for QTc prolongation in patients with SAH by means of multivariate analysis. Method We studied 100 patients who were admitted within 24 hours after onset of SAH. Standard 12-lead electrocardiography (ECG) was performed immediately after admission. QT intervals were measured from the ECG and were corrected for heart rate using the Bazett formula. We measured serum levels of sodium, potassium, calcium, adrenaline (epinephrine), noradrenaline (norepinephrine), dopamine, antidiuretic hormone, and glucose. Results The average QTc interval was 466 ± 46 ms. Patients were categorized into two groups based on the QTc interval, with a cutoff line of 470 ms. Univariate analyses showed significant relations between categories of QTc interval, and sex and serum concentrations of potassium, calcium, or glucose. Multivariate analyses showed that female sex and hypokalemia were independent risk factors for severe QTc prolongation. Hypokalemia (<3.5 mmol/l) was associated with a relative risk of 4.53 for severe QTc prolongation as compared with normokalemia, while the relative risk associated with female sex was 4.45 as compared with male sex. There was a significant inverse correlation between serum potassium levels and QTc intervals among female patients. Conclusion These findings suggest that female sex and hypokalemia are independent risk factors for severe QTc prolongation in patients with SAH. PMID:12793884

  19. Factors associated with a more rapid recovery after anterior cruciate ligament reconstruction using multivariate analysis.

    Science.gov (United States)

    Scherer, Job E; Moen, Maarten H; Weir, Adam; Schmikli, Sandor L; Tamminga, Rob; van der Hoeven, Henk

    2016-01-01

    In the past, several studies investigated factors that are prognostic or associated with outcome after anterior cruciate ligament (ACL) reconstruction. A recent review showed that only limited evidence is available for most studied factors, and that insufficient analysis methods were used commonly. Therefore, the aim of this study was to add more weight to the existing evidence, about factors that are associated with a more rapid outcome after ACL reconstruction. The second aim was to use multivariate analysis to study the possible factors independently. A cohort study was conducted with a follow-up of six months. Before surgery, patient variables were scored. Surgical variables were scored during arthroscopic ACL reconstructions with a single-bundle technique and hamstring autograft. The Lysholm score and subscales of the Knee Injury Osteoarthritis Outcome Score (KOOS) were assessed six months post surgery. A multiple analysis of variance (ANOVA) model was used to identify prognostic factors for outcome. In total, 118 patients were included. Patients, aged ≤30years, with a subjective knee score ≥ six, with normal flexion range of motion (ROM) of the knee, with flexion and extension strength deficit of ≤20%, and those with no previous knee surgery in the same knee at baseline scored significantly higher on outcome after multivariate analysis. No significant effect of surgical factors could be found. Younger age, higher subjective knee score, normal knee flexion, normal knee flexion and extension strength, and no previous knee surgery in the patients' history at baseline are associated with a more rapid recovery after ACL reconstruction. Level III, prognostic study. Copyright © 2015 Elsevier B.V. All rights reserved.

  20. Incidental durotomy during spinal surgery: a multivariate analysis for risk factors.

    Science.gov (United States)

    Du, Jerry Y; Aichmair, Alexander; Kueper, Janina; Lam, Cyrena; Nguyen, Joseph T; Cammisa, Frank P; Lebl, Darren R

    2014-10-15

    Multivariate analysis. The purpose of this study was to investigate risk factors for incidental durotomy (ID) in modern spine surgery techniques. ID, a relatively common complication of spine surgery, has been associated with postoperative complications such as durocutaneous fistulas, pseudomeningoceles, and arachnoiditis. Revision surgery may be necessary if the dural tear is not recognized and repaired during the initial procedure. ID was prospectively documented in patients who underwent spine surgery at a single institution during a 2-year period (n=4822). Patients with ID (n=182) from lumbar or thoracolumbar cases were matched 1:1 to a control cohort without ID. Demographic, diagnostic, and surgical procedure data were retrospectively collected and analyzed. Multivariate analysis identified revision spine surgery (adjusted odds ratio [aOR]: 4.78, 95% confidence interval [CI]: 2.84-8.06, P<0.01), laminectomy (aOR: 3.82, 95% CI: 2.02-7.22, P<0.01), and older age (aOR: 1.03, 95% CI: 1.01-1.04, P<0.01) as independent risk factors for ID. Fusion (aOR: 0.59, 95% CI: 0.35-0.99, P=0.04), foraminectomy, (aOR: 0.42, 95% CI: 0.25-0.69, P<0.01), and lateral approach (aOR: 0.29, 95% CI: 0.14-0.61, P<0.01) were independent protective factors. Prior spine surgery, laminectomy, and older age were significant independent risk factors for ID. The recently developed lateral approach to interbody fusion was identified as a significant protective factor for ID, along with fusion and foraminectomy. These findings may help guide future surgical decisions regarding ID and aid in the patient informed-consent process. 3.

  1. Índice de risco de mortalidade por endocardite infecciosa: um modelo logístico multivariado Risk index for death by infective endocarditis: a multivariate logistic model

    Directory of Open Access Journals (Sweden)

    Mário Augusto Cray da Costa

    2007-06-01

    endocarditis divided into two groups: discharged (137 and in-hospital death (49. Based on the odds ratios obtained by multivariate analysis, the probability of death was calculated and a mortality risk index created. RESULTS: Factors predictive of higher mortality (multivariate analysis and the risk index, with their repective weights were: age > 40 years (OR = 4.16; 95%CI [1.63-10.80] - 4 points, class IV heart failure or cardiovascular shock (OR = 4.93; 95%CI [1.86-13.05] - 5 points, uncontrolled sepsis (OR = 5.97; 95%CI [1.95-18.35] - 6 points, conduction disorder (OR = 5.07; 95%CI [1.67-15.35] - 5 points, arrhythmia (OR = 8.17; 95%CI [2.60-25.71] - 8 points, valve with extensive damage or abscess or prosthesis (OR = 4.77; 95%CI [1.44-15.76] - 5 points and large and mobile vegetation (OR = 4.36; 95%CI [1.55-12.90] - 4 points. Patients with scores between 0 and 10 had a mortality of 5.26% and scores over 20 of 78.9%. CONCLUSIONS: The higher the score, the higher the mortality rate. The mortality risk index may be used to estimate mortality in Infective Endocarditis.

  2. A multivariate statistical study with a factor analysis of recent planktonic foraminiferal distribution in the Coromandel Coast of India

    Digital Repository Service at National Institute of Oceanography (India)

    Jayalakshmy, K.V.; Rao, K.K.

    A study of planktonic foraminiferal assemblages from 19 stations in the neritic and oceanic regions off the Coromandel Coast, Bay of Bengal has been made using a multivariate statistical method termed as factor analysis. On the basis of abundance...

  3. [Understanding logistic regression].

    Science.gov (United States)

    El Sanharawi, M; Naudet, F

    2013-10-01

    Logistic regression is one of the most common multivariate analysis models utilized in epidemiology. It allows the measurement of the association between the occurrence of an event (qualitative dependent variable) and factors susceptible to influence it (explicative variables). The choice of explicative variables that should be included in the logistic regression model is based on prior knowledge of the disease physiopathology and the statistical association between the variable and the event, as measured by the odds ratio. The main steps for the procedure, the conditions of application, and the essential tools for its interpretation are discussed concisely. We also discuss the importance of the choice of variables that must be included and retained in the regression model in order to avoid the omission of important confounding factors. Finally, by way of illustration, we provide an example from the literature, which should help the reader test his or her knowledge.

  4. Sensitivity Analysis to Select the Most Influential Risk Factors in a Logistic Regression Model

    Directory of Open Access Journals (Sweden)

    Jassim N. Hussain

    2008-01-01

    Full Text Available The traditional variable selection methods for survival data depend on iteration procedures, and control of this process assumes tuning parameters that are problematic and time consuming, especially if the models are complex and have a large number of risk factors. In this paper, we propose a new method based on the global sensitivity analysis (GSA to select the most influential risk factors. This contributes to simplification of the logistic regression model by excluding the irrelevant risk factors, thus eliminating the need to fit and evaluate a large number of models. Data from medical trials are suggested as a way to test the efficiency and capability of this method and as a way to simplify the model. This leads to construction of an appropriate model. The proposed method ranks the risk factors according to their importance.

  5. Therapeutic factors related to irradiation in primary and metastatic liver cancer using multivariate analysis

    Energy Technology Data Exchange (ETDEWEB)

    Hatano, Kazuo (Chiba Univ. (Japan). School of Medicine)

    1990-06-01

    Between December 1973 and August 1987, 21 patients with primary liver cancer and 41 patients with metastatic liver cancer were treated with external irradiation, intra-arterial infusion chemotherapy and/or trans-arterial embolization (TAE) at the National Medical Center Hospital, the National South Kyushu Central Hospital and the National Kure Hospital. They were all inoperable cases. We diagnosed the tumor site and the involved area with many imagings and we decided the target volume. For primary liver cancer, the average survival period was 10.9 months, the 1-year survival rate was 28.6%, the 2-year survival rate was 14.3%, and the 3-year survival rate was 4.7%. Using multivariate analysis, stage, cancer reduction rate, Child classifiction and field size were valuable factors of the prognosis in the arterial infusion group. In the TAE group, cancer reduction rate was the most valuable factor. For metastatic liver cancer, the average survival period was 8.0 months, the 1-year survival rate was 19.5%, and the 5-year survival rate was 2.4%. Using multivariate analysis, pre-treatment K.P.S, distant metastasis, H, Child classification were valuable factors and pre-treatment K.P.S was most valuable factor. Although the indication of hepatic irradiation was generally thought to limit those cases which were Child A or B, H1 or H2 and the cases which have no distant metastasis, the cases which have their main portal tumor thrombus were also the indication of this therapy. (author).

  6. Multivariate Analysis of the Factors Associated With Sexual Intercourse, Marriage, and Paternity of Hypospadias Patients.

    Science.gov (United States)

    Kanematsu, Akihiro; Higuchi, Yoshihide; Tanaka, Shiro; Hashimoto, Takahiko; Nojima, Michio; Yamamoto, Shingo

    2016-10-01

    Patients with hypospadias are treated surgically during childhood, which has the intention of enabling a satisfactory sexual life in adulthood. However, it is unclear whether patients with corrected hypospadias can lead a satisfactory sexual life and sustain a marital relationship and produce offspring. To evaluate factors associated with achievement of sexual intercourse, marriage, and paternity in patients with hypospadias who have reached adulthood. Self-completion questionnaires were mailed in April 2012 to patients with hypospadias at least 18 years old who had been treated at our institution during childhood from 1973 through 1998 by a single surgeon and the same surgical policy. Assessments included the International Prostate Symptom Score, the International Index for Erectile Function-5, and non-validated questions related to current social and physical status and sexual, marital, and paternity experiences. Candidate factors were extracted from patients' neonatal data, surgical findings and results, and current physical and social status obtained by the questionnaires. Candidate factors associated with heterosexual intercourse, marriage, and paternity experiences were analyzed using univariate and multivariate proportional hazard models and log-rank test of Kaplan-Meier curves. Of the 518 patients contacted, 108 (age = 18-50 years, median = 28 years) met the inclusion criteria. Two- and one-stage repairs were performed as the initial treatment in 79 and 12, respectively, and 17 of the analyzed cases were reoperations for patients initially treated elsewhere. Fifty-seven patients had the milder type (31 glandular, 26 penile), 36 had the proximal type (13 penoscrotal, 23 scrotal-perineal), and 15 had an unknown type. Multivariate analyses by Cox proportional hazard model and log-rank tests confirmed that experience of sexual intercourse was associated with the milder type of hypospadias (P = .025 and .0076 respectively), marriage was associated with stable

  7. Multivariate co-integration analysis of the Kaya factors in Ghana.

    Science.gov (United States)

    Asumadu-Sarkodie, Samuel; Owusu, Phebe Asantewaa

    2016-05-01

    The fundamental goal of the Government of Ghana's development agenda as enshrined in the Growth and Poverty Reduction Strategy to grow the economy to a middle income status of US$1000 per capita by the end of 2015 could be met by increasing the labour force, increasing energy supplies and expanding the energy infrastructure in order to achieve the sustainable development targets. In this study, a multivariate co-integration analysis of the Kaya factors namely carbon dioxide, total primary energy consumption, population and GDP was investigated in Ghana using vector error correction model with data spanning from 1980 to 2012. Our research results show an existence of long-run causality running from population, GDP and total primary energy consumption to carbon dioxide emissions. However, there is evidence of short-run causality running from population to carbon dioxide emissions. There was a bi-directional causality running from carbon dioxide emissions to energy consumption and vice versa. In other words, decreasing the primary energy consumption in Ghana will directly reduce carbon dioxide emissions. In addition, a bi-directional causality running from GDP to energy consumption and vice versa exists in the multivariate model. It is plausible that access to energy has a relationship with increasing economic growth and productivity in Ghana.

  8. The Critical Factors for Korean Freight Forwarders’ Purchasing Negotiation in International Logistics

    Directory of Open Access Journals (Sweden)

    Soo Yong Shin

    2016-12-01

    Full Text Available The roles of freight forwarders as intermediaries continue to expand and become significant in international logistics. Purchasing negotiation is considered an important business process for freight forwarders and achieving a successful negotiation outcome should help forwarders to manage their business more effectively. This study used the analytical hierarchy process (AHP approach to identify the critical factors for successful purchasing negotiation for freight forwarders in Korea. A three-level AHP structure was constructed to examine the successful purchasing negotiation. The findings indicate that information (specifically quality of information is the most critical factor for a successful negotiation outcome for freight forwarders. This result turned out to be the same as the result found from the literature review. Literature review also indicated information as the most important factor.

  9. Reverse logistics for recycling: The customer service

    Directory of Open Access Journals (Sweden)

    Reis, E.

    2009-01-01

    Full Text Available Customer service is a central concern in the logistics practice and a study topic in the forward logistics research. This article investigates the elements of customer service and their importance in reverse logistics for recycling. Since consumer is the first intervenient in any reverse system that aims to recycle household residues, the provision of an adequate customer service gains an increased importance. Applying multivariate statistical methods (exploratory factor analysis, confirmatory factor analysis and discriminant analysis to the data from a sample of 267 Portuguese citizens, this study identifies the levels of customer service in this reverse logistics chain and evaluates their relative importance in achieving consumers’ participation. The study finds that, as in forward logistics, the customer service in reverse channels for recycling also has a hard and a soft level, being the former more important than the later. The results of this research suggest important guidelines to improve such a complex logistics service.

  10. Power Curve Estimation With Multivariate Environmental Factors for Inland and Offshore Wind Farms

    KAUST Repository

    Lee, Giwhyun

    2015-04-22

    In the wind industry, a power curve refers to the functional relationship between the power output generated by a wind turbine and the wind speed at the time of power generation. Power curves are used in practice for a number of important tasks including predicting wind power production and assessing a turbine’s energy production efficiency. Nevertheless, actual wind power data indicate that the power output is affected by more than just wind speed. Several other environmental factors, such as wind direction, air density, humidity, turbulence intensity, and wind shears, have potential impact. Yet, in industry practice, as well as in the literature, current power curve models primarily consider wind speed and, sometimes, wind speed and direction. We propose an additive multivariate kernel method that can include the aforementioned environmental factors as a new power curve model. Our model provides, conditional on a given environmental condition, both the point estimation and density estimation of power output. It is able to capture the nonlinear relationships between environmental factors and the wind power output, as well as the high-order interaction effects among some of the environmental factors. Using operational data associated with four turbines in an inland wind farm and two turbines in an offshore wind farm, we demonstrate the improvement achieved by our kernel method.

  11. Logistic regression analysis of the risk factors of acute renal failure complicating limb war injuries

    Directory of Open Access Journals (Sweden)

    Chang-zhi CHENG

    2011-06-01

    Full Text Available Objective To explore the risk factors of complication of acute renal failure(ARF in war injuries of limbs.Methods The clinical data of 352 patients with limb injuries admitted to 303 Hospital of PLA from 1968 to 2002 were retrospectively analyzed.The patients were divided into ARF group(n=9 and non-ARF group(n=343 according to the occurrence of ARF,and the case-control study was carried out.Ten factors which might lead to death were analyzed by logistic regression to screen the risk factors for ARF,including causes of trauma,shock after injury,time of admission to hospital after injury,injured sites,combined trauma,number of surgical procedures,presence of foreign matters,features of fractures,amputation,and tourniquet time.Results Fifteen of the 352 patients died(4.3%,among them 7 patients(46.7% died of ARF,3(20.0% of pulmonary embolism,3(20.0% of gas gangrene,and 2(13.3% of multiple organ failure.Univariate analysis revealed that the shock,time before admitted to hospital,amputation and tourniquet time were the risk factors for ARF in the wounded with limb injuries,while the logistic regression analysis showed only amputation was the risk factor for ARF(P < 0.05.Conclusion ARF is the primary cause-of-death in the wounded with limb injury.Prompt and accurate treatment and optimal time for amputation may be beneficial to decreasing the incidence and mortality of ARF in the wounded with severe limb injury and ischemic necrosis.

  12. Rapid Classification of Imaged Objects Using Molecular Factor and Multivariate Optical Computing

    Science.gov (United States)

    Pearl, Megan Renee

    Unique algorithm development is vital for the success of novel instrumentation. Our lab has focused on the design of imaging systems based on molecular factor and multivariate optical computing. A simulation-driven design approach was utilized to develop a multimode infrared imaging system for chemical contrast enhancement. This infrared thermal imaging system is based on molecular factor (MFC) and lockin computing methods. MFC was accomplished with filter elements made of thin organic films deposited on IR-transparent substrates and allows a system response to be tuned to a specific analyte. Unique algorithms were written in-house using MatLabRTM (The Mathworks, Natick, MA). The algorithms used a lock-in computing technique to amplify the diffuse re ectance signal, which is only a few percent of the total signal. Intensive thin film studies were conducted to understand the effects of films on fabric to improve our simulation-driven design approach. A prototype instrument has been validated through the production of a real setup. We have shown that it is able to detect trace amounts of blood diluted in water (as small as 1:100) on fabric as well as differentiate blood from common false positives of other blood detection methods (i.e., luminol). The second imaging system was designed for the differentiation of phytoplankton species in the ocean. Multivariate optical computing (MOC) was applied to the uorescence excitation spectra of individual phytoplankton cells to design multivariate optical elements (MOEs). MOEs are filters fabricated to mimic linear discriminants analysis (LDA) results based on plankton spectroscopy. The imaging system uses these MOEs housed in a filter wheel to produce "streak" images of phytoplankton as they flow past a CCD camera, with each streak having the appearance of a barcode whose intensities are related to scores of the plankton spectra on linear discriminant functions. Algorithms for this system have been designed to automatically

  13. Uni- and multivariate models for investigating potential prognostic factors in idiopathic sudden sensorineural hearing loss.

    Science.gov (United States)

    Lionello, Marco; Staffieri, Claudia; Breda, Stefano; Turato, Chiara; Giacomelli, Luciano; Magnavita, Paola; de Filippis, Cosimo; Staffieri, Alberto; Marioni, Gino

    2015-08-01

    With a worldwide incidence estimated at 8-15 per 100,000 population a year, idiopathic sudden sensorineural hearing loss (ISSHL) is a common clinical finding for otologists. There is a shortage of information on the clinical factors capable of predicting hearing recovery and response to therapy. The aim of the present study was to retrospectively investigate the prognostic value of clinical variables in relation to hearing recovery, in a cohort of 117 consecutive patients with ISSHL. Clinical parameters (signs, symptoms, comorbidities and treatments) and audiometric data were analyzed with univariate and multivariate statistical approaches for prognostic purposes to identify any correlation with hearing recovery, also expressed according to the Wilson criteria. Univariate analysis showed that age and hypertension were significantly related to hearing outcome (p = 0.004 and p = 0.015, respectively). Elderly patients and those with hypertension were at higher risk of experiencing no hearing recovery (OR = 3.25 and OR = 2.89, respectively). Age was an independent prognostic factor on multivariate analysis (p = 0.007). Tinnitus as a presenting symptom showed a trend towards an association with hearing recovery (p = 0.07). The treatment regimen, the time elapsing between the onset of symptoms and the start of therapy (p = 0.34), and the duration of the treatment (p = 0.83) were unrelated to recovery on univariate analysis. Among the parameters considered, only age was significantly and independently related to hearing outcome. There is a need for well-designed, randomized clinical trials to enable an evidence-based protocol to be developed for the treatment of ISSHL.

  14. Determinants of Caesarean Risk Factor in Northern Region of Bangladesh: A Multivariate Analysis.

    Science.gov (United States)

    Rahman, Mostafizur; Ahmad Shariff, Asma; Shafie, Aziz; Saaid, Rahmah; Md Tahir, Rohayatimah

    2014-01-01

    Caesarean section (c-section) rates have been increasing dramatically in the past decades around the world. This increase has been attributed to multiple factors such as maternal, socio-demographic and institutional fac-tors. Therefore, this study examines the impact of maternal, socio-demographic and relevant characteristics on caesar-ean delivery in the northern region of Bangladesh. This study is based on a total of 1142 delivery cases from four private hospitals and four public hospitals during the period of January to March 2010. The study was carried out using a cross-sectional design where data were collected by simple random sampling. In order to data analysis, first, an initial bivariate analysis was performed by the chi-square and Fisher exact test. Secondly, the risk factors which are associated with c-section identify by logistic re-gression model. Finally, a stepwise regression analysis was carried out to isolate the most influential risk factors. Among the 17 risk factors, nine were found significantly associated with type of delivery. Eight of the risk factors i.e. previous c-section, pregnancy-induced swollen of leg, prolonged labour, maternal education status, mater-nal age more than 25 years, low birth order, length of baby more than 45cm and irregular intake of a balanced diet remained independently significant for caesarean delivery. The value of Pprivate ones and conversely for the demographic characteristics. The findings of this study suggested that the above factors may influence the health-seeking behaviour of women in the northern region of Bangladesh.

  15. Logistic Regression Analysis on Factors Affecting Adoption of RiceFish Farming in North Iran

    Institute of Scientific and Technical Information of China (English)

    Seyyed Ali NOORHOSSEINI-NIYAKI; Mohammad Sadegh ALLAHYARI

    2012-01-01

    We evaluated the factors influencing the adoption of rice-fish farming in the Tavalesh region near the Caspian Sea in northern Iran.We conducted a survey with open-ended questions.Data were collected from 184 respondents (61 adopters and 123 non-adopters) randomly sampled from selected villages and analyzed using logistic regression and multiresponse analysis.Family size,number of contacts with an extension agent,participation in extension-education activities,membership in social institutions and the presence of farm workers were the most important socioeconomic factors for the adoption of rice-fish farming system.In addition,economic problems were the most common issue reported by adopters.Other issues such as lack of access to appropriate fish food,losses of fish,lack of access to high quality fish fingerlings and dehydration and poor water quality were also important to a number of farmers.

  16. Adjusting for unmeasured confounding due to either of two crossed factors with a logistic regression model.

    Science.gov (United States)

    Li, Li; Brumback, Babette A; Weppelmann, Thomas A; Morris, J Glenn; Ali, Afsar

    2016-08-15

    Motivated by an investigation of the effect of surface water temperature on the presence of Vibrio cholerae in water samples collected from different fixed surface water monitoring sites in Haiti in different months, we investigated methods to adjust for unmeasured confounding due to either of the two crossed factors site and month. In the process, we extended previous methods that adjust for unmeasured confounding due to one nesting factor (such as site, which nests the water samples from different months) to the case of two crossed factors. First, we developed a conditional pseudolikelihood estimator that eliminates fixed effects for the levels of each of the crossed factors from the estimating equation. Using the theory of U-Statistics for independent but non-identically distributed vectors, we show that our estimator is consistent and asymptotically normal, but that its variance depends on the nuisance parameters and thus cannot be easily estimated. Consequently, we apply our estimator in conjunction with a permutation test, and we investigate use of the pigeonhole bootstrap and the jackknife for constructing confidence intervals. We also incorporate our estimator into a diagnostic test for a logistic mixed model with crossed random effects and no unmeasured confounding. For comparison, we investigate between-within models extended to two crossed factors. These generalized linear mixed models include covariate means for each level of each factor in order to adjust for the unmeasured confounding. We conduct simulation studies, and we apply the methods to the Haitian data. Copyright © 2016 John Wiley & Sons, Ltd.

  17. Prioritizing critical success factors for reverse logistics implementation using fuzzy-TOPSIS methodology

    Science.gov (United States)

    Agrawal, Saurabh; Singh, Rajesh K.; Murtaza, Qasim

    2016-11-01

    Electronics industry is one of the fastest growing industries in the world. In India also, there are high turnovers and growing demand of electronics product especially after post liberalization in early nineties. These products generate e-waste which has become big environmental issue. Industries can handle these e-waste and product returns efficiently by developing reverse logistics (RL) system. A thorough study of critical success factors (CSFs) and their ordered implementation is essential for successful RL implementation. The aim of the study is to review the CSFs, and to prioritize them for RL implementation in Indian electronics industry. Twelve CSFs were identified through literature review, and discussion with the experts from the Indian electronics industry. Fuzzy-Technique for Order Preference by Similarity to Ideal Solution (TOPSIS) approach is proposed for prioritizing these CSFs. Perusal of literature indicates that fuzzy-TOPSIS has not been applied earlier for prioritization of CSFs in Indian electronics industry. Five Indian electronics companies were selected for evaluation of this methodology. Results indicate that most of the identified factors are crucial for the RL implementation. Top management awareness, resource management, economic factors, and contracts terms and conditions are top four prioritized factor, and process capabilities and skilled workers is the least prioritized factor. The findings will be useful for successful RL implementation in Indian electronics industry.

  18. Evaluating risk factors for endemic human Salmonella Enteritidis infections with different phage types in Ontario, Canada using multinomial logistic regression and a case-case study approach

    Directory of Open Access Journals (Sweden)

    Varga Csaba

    2012-10-01

    Full Text Available Abstract Background Identifying risk factors for Salmonella Enteritidis (SE infections in Ontario will assist public health authorities to design effective control and prevention programs to reduce the burden of SE infections. Our research objective was to identify risk factors for acquiring SE infections with various phage types (PT in Ontario, Canada. We hypothesized that certain PTs (e.g., PT8 and PT13a have specific risk factors for infection. Methods Our study included endemic SE cases with various PTs whose isolates were submitted to the Public Health Laboratory-Toronto from January 20th to August 12th, 2011. Cases were interviewed using a standardized questionnaire that included questions pertaining to demographics, travel history, clinical symptoms, contact with animals, and food exposures. A multinomial logistic regression method using the Generalized Linear Latent and Mixed Model procedure and a case-case study design were used to identify risk factors for acquiring SE infections with various PTs in Ontario, Canada. In the multinomial logistic regression model, the outcome variable had three categories representing human infections caused by SE PT8, PT13a, and all other SE PTs (i.e., non-PT8/non-PT13a as a referent category to which the other two categories were compared. Results In the multivariable model, SE PT8 was positively associated with contact with dogs (OR=2.17, 95% CI 1.01-4.68 and negatively associated with pepper consumption (OR=0.35, 95% CI 0.13-0.94, after adjusting for age categories and gender, and using exposure periods and health regions as random effects to account for clustering. Conclusions Our study findings offer interesting hypotheses about the role of phage type-specific risk factors. Multinomial logistic regression analysis and the case-case study approach are novel methodologies to evaluate associations among SE infections with different PTs and various risk factors.

  19. Effective factors contraceptive use by logistic regression model in Tehran, 1996

    Directory of Open Access Journals (Sweden)

    Ramezani F

    1999-07-01

    Full Text Available Despite unwillingness to fertility, about 30% of couples do not use any kind of contraception and this will lead to unwanted pregnancy. In this clinical trial study, 4177 subjects who had at least one alive child, and delivered in one of the 12 university hospitals in Tehran were recruited. This study was conducted in 1996. The questionnaire included some questions about contraceptive use, their attitudes about unwantedness or wantedness of their current pregnancies. Data were analysed using a Logistic Regrassion Model. Results showed that 20.3% of those who had no fertility intention, did not use any kind of contraception methods, 41.1% of the subjects who were using a contraception method before pregnancy, had got pregnant unwantedly. Based on Logistic Regression Model; age, education, previous familiarity of women with contraception methods and husband's education were the most significant factors in contraceptive use. Subjects who were 20 years old and less or 35 years old and more and illeterate subjects were at higher risk for unuse of contraception methods. This risk was not related to the gender of their children that suggests a positive change in their perspectives towards sex and the number of children. It is suggested that health politicians choose an appropriate model to enhance the literacy, education and counseling for the correct usage of contraceptives and prevention of unwanted pregnancy.

  20. [Phytoplankton assemblages and their relation to environmental factors by multivariate statistic analysis in Bohai Bay].

    Science.gov (United States)

    Zhou, Ran; Peng, Shi-Tao; Qin, Xue-Bo; Shi, Hong-Hua; Ding, De-Wen

    2013-03-01

    A detailed field survey of hydrological, chemical and biological resources was conducted in the Bohai Bay in spring and summer 2007. The distributions of phytoplankton and their relations to environmental factors were investigated with multivariate analysis techniques. Totally 17 and 23 taxa were identified in spring and summer, respectively. The abundance of phytoplankton in spring was 115 x 10(4) cells x m(-3), which was significantly higher than that in summer (3.1 x 10(4) cells x m(-3)). Characteristics of phytoplankton assemblages in the two seasons were identified using principal component analysis (PCA), while redundancy analysis (RDA) was used to examine the environmental variables that may explain the patterns of variation of the phytoplankton community. Based on PCA results, in the spring, the phytoplankton was mainly distributed in the center and northern water zone, where the nitrate nitrogen concentration was higher. However, in summer, phytoplankton was found distributed in all zones of Bohai Bay, while the dominant species was mainly distributed in the estuary. RDA indicated that the key environmental factors that influenced phytoplankton assemblages in the spring were nitrate nitrogen (NO3(-) -N), nitrite nitrogen (NO2(-) -N) and soluble reactive phosphorus (SRP), while ammonium nitrogen (NH4(+) -N) and water temperature (WT) played key roles in summer.

  1. Multivariate Analysis of Factors Influencing Facial Nerve Outcome following Microsurgical Resection of Vestibular Schwannoma.

    Science.gov (United States)

    Torres, Renato; Nguyen, Yann; Vanier, Antoine; Smail, Mustapha; Ferrary, Evelyne; Sterkers, Olivier; Kalamarides, Michel; Bernardeschi, Daniele

    2017-03-01

    Objective To assess through multivariate analysis the clinical pre- and intraoperative factors of facial nerve outcomes at day 8 and 1-year recovery of facial palsy, as compared with day 8 status among patients who underwent total resection of unilateral vestibular schwannoma. Study Design Case series with chart review. Setting Tertiary referral center. Subjects and Methods This study included 229 patients with preoperative normal facial function and anatomic preservation of the facial nerve. Clinical, radiologic, and intraoperative factors were assessed according to facial nerve function at day 8 and 1 year. Results We observed that 74% and 84% of patients had good facial function (House-Brackmann [HB] I-II) at day 8 and 1 year, respectively. Of 60 patients, 26 (43%) who had impaired facial function (HB III-VI) at day 8 recovered good facial function (HB I-II) 1 year after surgery. A structured equation model showed that advanced tumor stage and strong facial nerve adhesion were independently associated with facial nerve conduction block at day 8. No predictive factor of impaired facial function recovery was seen at 1 year. In terms of the extracanalicular diameter of the tumor, the cutoff point to minimize the risk of impaired facial function was 16 mm. Conclusion At day 8 after vestibular schwannoma resection, facial function was impaired in the case of large tumors or strong facial nerve adhesion to the tumor. After 1 year, less than half of the patients recovered good facial function, and no predictive factor was found to be associated with this possible recovery.

  2. Peripheral vascular trauma in children: related factors by the logistic regression method

    Directory of Open Access Journals (Sweden)

    Raquel Nogueira Avelar Silva

    2014-03-01

    Full Text Available The objective of the present study was to identify the factors related to “peripheral vascular trauma” in children aged six months to 12 years. This prospective cohort study included children with peripheral vein punctured for the first time per side and excluded those with high/complete healing of trauma signs after removing the catheter. Daily clinical evaluations were performed in intervals shorter than 24 hours. Data were treated according to Pearson’s test and the logistic regression method. Among the 14 variables considered intervenient, four were statistically associated to the occurrence of trauma: dirtiness and humidity in the catheter insertion site, catheter caliber, and age. A causal relationship was found between the intervenient variables and the outcome, “peripheral vascular trauma”, thus, contributing to forming the knowledge of the peripheral venous puncture in children aged six months to 12 years. Descriptors: Child; Nursing Diagnosis; Veins; Injuries.

  3. The Relationship between Logistics Sophistication and Drivers of the Outsourcing of Logistics Activities

    Directory of Open Access Journals (Sweden)

    Peter Wanke

    2008-10-01

    Full Text Available A strong link has been established between operational excellence and the degree of sophistication of logistics organization, a function of factors such as performance monitoring, investment in Information Technology [IT] and the formalization of logistics organization, as proposed in the Bowersox, Daugherty, Dröge, Germain and Rogers (1992 Leading Edge model. At the same time, shippers have been increasingly outsourcing their logistics activities to third party providers. This paper, based on a survey with large Brazilian shippers, addresses a gap in the literature by investigating the relationship between dimensions of logistics organization sophistication and drivers of logistics outsourcing. To this end, the dimensions behind the logistics sophistication construct were first investigated. Results from factor analysis led to the identification of six dimensions of logistics sophistication. By means of multivariate logistical regression analyses it was possible to relate some of these dimensions, such as the formalization of the logistics organization, to certain drivers of the outsourcing of logistics activities of Brazilian shippers, such as cost savings. These results indicate the possibility of segmenting shippers according to characteristics of their logistics organization, which may be particularly useful to logistics service providers.

  4. Using latent variables in logistic regression to reduce multicollinearity, A case-control example: breast cancer risk factors

    Directory of Open Access Journals (Sweden)

    Mohamad Amin Pourhoseingholi

    2008-03-01

    Full Text Available

    Background: Logistic regression is one of the most widely used models to analyze the relation between one or more explanatory variables and a categorical response in the field of epidemiology, health and medicine. When there is strong correlation among explanatory variables, i.e.multicollinearity, the efficiency of model reduces considerably. The objective of this research was to employ latent variables to reduce the effect of multicollinearity in analysis of a case-control study about breast cancer risk factors.

    Methods: The data belonged to a case-control study in which 300 women with breast cancer were compared to same number of controls. To assess the effect of multicollinearity, five highly correlated quantitative variables were selected. Ordinary logistic regression with collinear data was compared to two models contain latent variables were generated using either factor analysis or principal components analysis. Estimated standard errors of parameters were selected to compare the efficiency of models. We also conducted a simulation study in order to compare the efficiency of models with and without latent factors. All analyses were carried out using S-plus.

    Results: Logistic regression based on five primary variables showed an unusual odds ratios for age at first pregnancy (OR=67960, 95%CI: 10184-453503 and for total length of breast feeding (OR=0. On the other hand the parameters estimated for logistic regression on latent variables generated by both factor analysis and principal components analysis were statistically significant (P<0.003. Their standard errors were smaller than that of ordinary logistic regression on original variables. The simulation showed that in the case of normal error and 58% reliability the logistic regression based on latent variables is more efficient than that model for collinear variables.

    Conclusions: This research

  5. Risk factors for subclinical intramammary infection in dairy goats in two longitudinal field studies evaluated by Bayesian logistic regression

    DEFF Research Database (Denmark)

    Koop, Gerrit; Collar, Carol A.; Toft, Nils

    2013-01-01

    are imperfect tests, particularly lacking sensitivity, which leads to misclassification and thus to biased estimates of odds ratios in risk factor studies. The objective of this study was to evaluate risk factors for the true (latent) IMI status of major pathogens in dairy goats. We used Bayesian logistic......, caprine arthritis encephalitis-virus infection status, and kidding season), and uncontrollable risk factors (parity, lactation stage, milk yield, pregnancy status, and breed) were measured in the Dutch study, the Californian study or in both studies. Bayesian logistic regression models were constructed...... in which the true (but latent) infection status was linked to the joint test results, as functions of test sensitivity and specificity. The latent IMI status was the dependent variable in the logistic regression model with risk factors as independent variables and with random herd and goat effects...

  6. A Non-linearized PLS Model Based on Multivariate Dominant Factor for Laser-induced Breakdown Spectroscopy Measurements

    CERN Document Server

    Wang, Zhe; Li, Lizhi; Ni, Weidou; Li, Zheng

    2011-01-01

    A multivariate dominant factor based non-linearized PLS model is proposed. The intensities of different lines were taken to construct a multivariate dominant factor model, which describes the dominant concentration information of the measured species. In constructing such a multivariate model, non-linear transformation of multi characteristic line intensities according to the physical mechanisms of lased induced plasma spectrum were made, combined with linear-correlation-based PLS method, to model the nonlinear self-absorption and inter-element interference effects. This enables the linear PLS method to describe non-linear relationship more accurately and provides the statistics-based PLS method with physical backgrounds. Moreover, a secondary PLS is applied utilizing the whole spectra information to further correct the model results. Experiments were conducted using standard brass samples. Taylor expansion was applied to make the nonlinear transformation to describe the self-absorption effect of Cu. Then, li...

  7. A New Benchmark for Internet Use: A Logistic Modeling of Factors Influencing Internet Use in Canada, 2005

    Science.gov (United States)

    Noce, Anthony A.; McKeown, Larry

    2008-01-01

    Internet diffusion is not homogeneous and depends on many factors. This study uses data from the Canadian Internet Use Survey (CIUS) to explore the extent demographic variables affect Internet use by individuals in Canada. A logistic model confirms that certain factors, educational attainment, and geography in particular influence Internet use in…

  8. Multivariate poisson-lognormal model for modeling related factors in crash frequency by severity

    Directory of Open Access Journals (Sweden)

    Mehdi Tazhibi

    2013-01-01

    Full Text Available Aims: Traditionally, roadway safety analyses have used univariate distributions to model crash data for each level of severity separately. This paper uses the multivariate Poisson lognormal (MVPLN models to estimate the expected crash frequency by two levels of severity and then compares those estimates with the univariate Poisson-lognormal (UVPLN and the univariate Poisson (UVP models. Materials and Methods: The parameters estimation is done by Bayesian method for crash data at two levels of severity at the intersection of Isfahan city for 6 months. Results: The results showed that there was over-dispersion issue in data. The UVP model is not able to overcome this problem while the MVPLN model can account for over-dispersion. Also, the estimates of the extra Poisson variation parameters in the MVPLN model were smaller than the UVPLN model that causes improvement in the precision of the MNPLN model. Hence, the MVPLN model is better fitted to the data set. Also, results showed effect of the total Average annual daily traffic (AADT on the property damage only crash was significant in the all of models but effect of the total left turn AADT on the injuries and fatalities crash was significant just in the UVP model. Hence, holding all other factors fixed more property damage only crashes were expected on more the total AADT. For example, under MVPLN model an increase of 1000 vehicles in (average the total AADT was predicted to result in 31% more property damage only crash. Conclusion: Hence, reduction of total AADT was predicted to be highly cost-effective, in terms of the crash cost reductions over the long run.

  9. Multivariate analysis of factors predicting prostate dose in intensity-modulated radiotherapy.

    Science.gov (United States)

    Tomita, Tsuneyuki; Nakamura, Mitsuhiro; Hirose, Yoshinori; Kitsuda, Kenji; Notogawa, Takuya; Miki, Katsuhito; Nakamura, Kiyonao; Ishigaki, Takashi

    2014-01-01

    We conducted a multivariate analysis to determine relationships between prostate radiation dose and the state of surrounding organs, including organ volumes and the internal angle of the levator ani muscle (LAM), based on cone-beam computed tomography (CBCT) images after bone matching. We analyzed 270 CBCT data sets from 30 consecutive patients receiving intensity-modulated radiation therapy for prostate cancer. With patients in the supine position on a couch with the HipFix system, data for center of mass (COM) displacement of the prostate and the state of individual organs were acquired and compared between planning CT and CBCT scans. Dose distributions were then recalculated based on CBCT images. The relative effects of factors on the variance in COM, dose covering 95% of the prostate volume (D95%), and percentage of prostate volume covered by the 100% isodose line (V100%) were evaluated by a backward stepwise multiple regression analysis. COM displacement in the anterior-posterior direction (COMAP) correlated significantly with the rectum volume (δVr) and the internal LAM angle (δθ; R = 0.63). Weak correlations were seen for COM in the left-right (R = 0.18) and superior-inferior directions (R = 0.31). Strong correlations between COMAP and prostate D95% and V100% were observed (R ≥ 0.69). Additionally, the change ratios in δVr and δθ remained as predictors of prostate D95% and V100%. This study shows statistically that maintaining the same rectum volume and LAM state for both the planning CT simulation and treatment is important to ensure the correct prostate dose in the supine position with bone matching. Copyright © 2014 American Association of Medical Dosimetrists. Published by Elsevier Inc. All rights reserved.

  10. Síndrome cólica em equinos de uso militar: análise multivariável de fatores de risco Colic syndrome in military horses: risk factors multivariable analysis

    Directory of Open Access Journals (Sweden)

    Paula Vieira Evans Hossell Laranjeira

    2009-09-01

    Full Text Available O objetivo deste estudo foi identificar os fatores associados a episódios de cólica em equinos de unidades militares no Estado do Rio de Janeiro: Regimento Escola de Cavalaria, Academia Militar das Agulhas Negras e Esquadrão Escola de Cavalaria da Polícia Militar. Para tanto, foi conduzido um estudo de caso controle aninhado em uma coorte. Um total de 770 equinos foi estudado, com 362 (47,0% equinos classificados como casos e 408 (53,0% classificados como controles. A análise multivariável de regressão logística foi utilizada para identificar os fatores preditivos da cólica, mostrando que o sistema de criação dos equinos em confinamento (OR= 3,62; 95% IC 2,57-5,10; o consumo de grãos superior a 6kg dia-1 (OR= 2,64; 95% IC 1,54-4,50; e a idade dos equinos, com maior possibilidade de ocorrência da cólica nos animais com idade superior a 16 anos (OR= 2,08; 95% IC 1,18-3,67, foram fatores de risco significativamente associados à cólica, após ajustamento para outras variáveis.This research aimed to identify colic associated factors in horses of military units in Rio de Janeiro State: Regimento Escola de Cavalaria, Academia Militar das Agulhas Negras and Esquadrão Escola de Cavalaria. A case control study nestled in one coorte was conducted. A total of 770 horses had been studied, with 362 (47.0% horses classified as cases and 408 (53.0% as control. Multivariable analysis of logistic regression was used to identify colic predictive factors, showing that horses confined system creation (OR= 3.62; 95% CI 2.57-5.10, concentrate intake above 6kg day-1 (OR= 2.64; 95% CI 1.54-4.50 and equine age, with higher possibility of colic in horses above 16 years (OR= 2.08; 95% CI 1.18-3.67, had been risk factors significantly associated with colic, after adjustment for other variables.

  11. The likelihood of achieving quantified road safety targets: a binary logistic regression model for possible factors.

    Science.gov (United States)

    Sze, N N; Wong, S C; Lee, C Y

    2014-12-01

    In past several decades, many countries have set quantified road safety targets to motivate transport authorities to develop systematic road safety strategies and measures and facilitate the achievement of continuous road safety improvement. Studies have been conducted to evaluate the association between the setting of quantified road safety targets and road fatality reduction, in both the short and long run, by comparing road fatalities before and after the implementation of a quantified road safety target. However, not much work has been done to evaluate whether the quantified road safety targets are actually achieved. In this study, we used a binary logistic regression model to examine the factors - including vehicle ownership, fatality rate, and national income, in addition to level of ambition and duration of target - that contribute to a target's success. We analyzed 55 quantified road safety targets set by 29 countries from 1981 to 2009, and the results indicate that targets that are in progress and with lower level of ambitions had a higher likelihood of eventually being achieved. Moreover, possible interaction effects on the association between level of ambition and the likelihood of success are also revealed.

  12. Predicting drug-target interactions by dual-network integrated logistic matrix factorization

    Science.gov (United States)

    Hao, Ming; Bryant, Stephen H.; Wang, Yanli

    2017-01-01

    In this work, we propose a dual-network integrated logistic matrix factorization (DNILMF) algorithm to predict potential drug-target interactions (DTI). The prediction procedure consists of four steps: (1) inferring new drug/target profiles and constructing profile kernel matrix; (2) diffusing drug profile kernel matrix with drug structure kernel matrix; (3) diffusing target profile kernel matrix with target sequence kernel matrix; and (4) building DNILMF model and smoothing new drug/target predictions based on their neighbors. We compare our algorithm with the state-of-the-art method based on the benchmark dataset. Results indicate that the DNILMF algorithm outperforms the previously reported approaches in terms of AUPR (area under precision-recall curve) and AUC (area under curve of receiver operating characteristic) based on the 5 trials of 10-fold cross-validation. We conclude that the performance improvement depends on not only the proposed objective function, but also the used nonlinear diffusion technique which is important but under studied in the DTI prediction field. In addition, we also compile a new DTI dataset for increasing the diversity of currently available benchmark datasets. The top prediction results for the new dataset are confirmed by experimental studies or supported by other computational research.

  13. A multivariate study of the effects of high-risk factors on performance on the Brazelton Neonatal Assessment Scale.

    Science.gov (United States)

    Lester, B M; Emory, E K; Hoffman, S L

    1976-06-01

    The Brazelton Neonatal Assessment Scale was administered to 52 newborn infants. A factor analysis revealed 2 main factors, 1 along an attention-orientation dimension, the other relating to temperament arousal. A stepwise multiple linear regression analysis showed that the attention-orientation factor was related to birth weight, age of the mother, and sex and race of the baby. The only variable related to the temperament-arousal factor was 5-min Apgar scor. The study, although exploratory, demonstrates the use of multivariate techniques in the assessment of influences on newborn behavior.

  14. Application of ordinal logistic regression analysis in determining risk factors of child malnutrition in Bangladesh

    OpenAIRE

    Das Sumonkanti; Rahman Rajwanur M

    2011-01-01

    Abstract Background The study attempts to develop an ordinal logistic regression (OLR) model to identify the determinants of child malnutrition instead of developing traditional binary logistic regression (BLR) model using the data of Bangladesh Demographic and Health Survey 2004. Methods Based on weight-for-age anthropometric index (Z-score) child nutrition status is categorized into three groups-severely undernourished (< -3.0), moderately undernourished (-3.0 to -2.01) and nourished (≥-2.0...

  15. The Impact of Three Factors on the Recovery of Item Parameters for the Three-Parameter Logistic Model

    Science.gov (United States)

    Kim, Kyung Yong; Lee, Won-Chan

    2017-01-01

    This article provides a detailed description of three factors (specification of the ability distribution, numerical integration, and frame of reference for the item parameter estimates) that might affect the item parameter estimation of the three-parameter logistic model, and compares five item calibration methods, which are combinations of the…

  16. Business process re-engineering in the logistics industry: a study of implementation, success factors, and performance

    Science.gov (United States)

    Shen, Chien-wen; Chou, Ching-Chih

    2010-02-01

    As business process re-engineering (BPR) is an important foundation to ensure the success of enterprise systems, this study would like to investigate the relationships among BPR implementation, BPR success factors, and business performance for logistics companies. Our empirical findings show that BPR companies outperformed non-BPR companies, not only on information processing, technology applications, organisational structure, and co-ordination, but also on all of the major logistics operations. Comparing the different perceptions of the success factors for BPR, non-BPR companies place greater emphasis on the importance of employee involvement while BPR companies are more concerned about the influence of risk management. Our findings also suggest that management attitude towards BPR success factors could affect performance with regard to technology applications and logistics operations. Logistics companies which have not yet implemented the BPR approach could refer to our findings to evaluate the advantages of such an undertaking and to take care of those BPR success factors affecting performance before conducting BPR projects.

  17. Survivor needs or logistical convenience? Factors shaping decisions to deliver relief to earthquake-affected communities, Pakistan 2005-06.

    Science.gov (United States)

    Benini, Aldo; Conley, Charles; Dittemore, Brody; Waksman, Zachary

    2009-03-01

    In Bureaucratizing the Good Samaritan, Waters (2001) argues that bureaucratic rationality distracts humanitarian agencies from the needs of the people they are supposed to assist, in favour of other values that their institutional frameworks dictate. We test his claim by investigating the response to the Pakistan 2005 earthquake. One of us (Dittemore) worked with the United Nations Joint Logistics Centre in the theatre, managing a relief cargo shipment database. The response, known as 'Operation Winter Race', was hampered by extreme logistical challenges, but ultimately succeeded in averting a second disaster resulting from cold and starvation. We use statistical models to probe whether survivor needs significantly guided decisions to deliver relief to affected communities. Needs assessments remained incomplete and incoherent. We measure needs through proxy indicators and integrate them, on a Geographic Information System (GIS) platform, with logistics and relief delivery data. We find that, despite strong logistics effects, needs orientations were significant. However, the strength of decision factors varies between commodity types (food versus clothing and shelter versus reconstruction materials) as well as over the different phases of the response. This study confirms Thomas's observation that logistics databases are rich 'repositories of data that can be analyzed to provide post-event learning' (Thomas, 2003, p. 4). This article is an invitation for others to engage in creative humanitarian data management.

  18. Macro-logistics Decision Factors and Information Measures for Scanning Global (Supply Chain) Environments in International Location Choice

    DEFF Research Database (Denmark)

    Kinra, Aseem

    in scanning against this international uncertainty is also developed. For this purpose, the study deploys integrated literature reviews and content analyses. Finally, the study employs expert opinions in order to validate these factors and information measures and to present the findings in the form...... operations and activities, and poses environmental complexity in the form of risks and costs that organisations need to contend with. With this background, the purpose of this paper is to report on the most important macro logistics decision factors that describe environmental complexity for global....../cross border logistics operations. The study applies a decision-making oriented approach in order to develop a set of macrologistics factors that pose international uncertainty in cross-border flows of goods, information, payment and ownership. Similarly, a list of information measures that are relevant...

  19. Multivariate factor analysis of detailed milk fatty acid profile: Effects of dairy system, feeding, herd, parity, and stage of lactation.

    Science.gov (United States)

    Mele, M; Macciotta, N P P; Cecchinato, A; Conte, G; Schiavon, S; Bittante, G

    2016-12-01

    We investigated the potential of using multivariate factor analysis to extract metabolic information from data on the quantity and quality of milk produced under different management systems. We collected data from individual milk samples taken from 1,158 Brown Swiss cows farmed in 85 traditional or modern herds in Trento Province (Italy). Factor analysis was carried out on 47 individual fatty acids, milk yield, and 5 compositional milk traits (fat, protein, casein, and lactose contents, somatic cell score). According to a previous study on multivariate factor analysis, a variable was considered to be associated with a specific factor if the absolute value of its correlation with the factor was ≥0.60. The extracted factors were representative of the following 12 groups of fatty acids or functions: de novo fatty acids, branched fatty acid-milk yield, biohydrogenation, long-chain fatty acids, desaturation, short-chain fatty acids, milk protein and fat contents, odd fatty acids, conjugated linoleic acids, linoleic acid, udder health, and vaccelenic acid. Only 5 fatty acids showed small correlations with these groups. Factor analysis suggested the existence of differences in the metabolic pathways for de novo short- and medium-chain fatty acids and Δ(9)-desaturase products. An ANOVA of factor scores highlighted significant effects of the dairy farming system (traditional or modern), season, herd/date, parity, and days in milk. Factor behavior across levels of fixed factors was consistent with current knowledge. For example, compared with cows farmed in modern herds, those in traditional herds had higher scores for branched fatty acids, which were inversely associated with milk yield; primiparous cows had lower scores than older cows for de novo fatty acids, probably due to a larger contribution of lipids mobilized from body depots on milk fat yield. The statistical approach allowed us to reduce a large number of variables to a few latent factors with biological

  20. 预测无痛人工流产术中发生体动反应的多因素logistic回归分析%Predicting body movement during induced abortion with intravenous anesthesia by multivariate logistic analysis

    Institute of Scientific and Technical Information of China (English)

    姜黎珊; 张冯江; 马雷雷; 孙凯; 严敏

    2012-01-01

    Objective To investigate the role of the perfusion index (PI) in predicting body movement during indolent induced abortion with intravenous anesthesia by multivariate logistic analysis.Methods 68 early pregnancy women,ASA I,aged 20 y-30 y,weighed 45 kg-60 kg,were subjected to indolent induced abortion with 1.8 mg/kg propofol and 0.5 mg/kg ketamine in this study and allocated into moving group and non-moving group based on whether body movement responses occurred during the surgical procedures.The PI,bispectral index (BIS),HR,SpO2 and blood pressure were monitored before induction of anesthesia (T1) and 3 min after induction (T2).Results 32.8% of the pregnant women took place body movement during the procedures.There were no significant difference between two groups in age,weight,gestational weeks,the history of induced abortion or labor,BIS index,blood pressure and HR at T1 and T2 (P>0.05).Compared with non-moving group,the pregnant women in moving group showed lower PI at T1 and T2 (0.39±0.16,0.99±0.40) and the ratio of PI at T2/T1 [PI (T2/T1)] (2.91± 1.41 ) (P<0.05).Logistic analysis showed that PI at T2 and PI (T2/Tt) were independent factors for predicting body movement during the induced abortion.According to the analysis of receivers operating characteristic curve,using Pt at T2 and PI (T2/T1) for predicting body movement,the areas under curves(AUC) were respectively 0.897 and 0.857.Conclusions Measurement of PI is helpful for monitoring anesthesia,and PI at T2 as well PI(T2/T1) might be effective in predicting body movement during the induced abortion.%目的 通过对无痛人工流产术中体动反应进行多因素的回归分析,探讨灌注指数在静脉麻醉中预测体动反应的作用.方法 68例美国麻醉医师协会(ASA)分级Ⅰ级、年龄20岁~30岁、体重45 kg~60 kg接受无痛人工流产术的孕妇,麻醉给予异丙酚1.8 mg/kg和氯胺酮0.5 mg/kg静脉注射,患者安静3 min后的测量值(T1)

  1. Clinical implications of multifocality as a prognostic factor in breast carcinoma - a multivariate analysis study comprising 460 cases

    Science.gov (United States)

    Boros, Monica; Voidazan, Septimiu; Moldovan, Cosmin; Georgescu, Rares; Toganel, Cornelia; Moncea, Denisa; Molnar, Claudiu V; Podoleanu, Cristian; Eniu, Alexandru; Stolnicu, Simona

    2015-01-01

    Background: Multifocality is not listed among prognostic factors in international breast cancer guidelines. This study aims to analyze survival in multiple breast carcinomas (MFMC cc) compared to unifocal ones (UF cc), in order to assess the prognostic impact of multifocality. Methods: The study included 460 breast carcinomas (2002-2006) with a median follow-up time of 104 months (74-134 months). We assessed mortality rates, overall survival at 5 years and 10 years in general, overall survival at 5 and 10 years in MFMC cc compared to UF cc, as well as median survival and survival rate according to age, T status and axillary lymph node status in MFMC cc compared to UF cc. We carried out a multivariate analysis in order to identify independent predictor factors for survival. Results: 69/460 (15%) of cases were MFMC cc. Mortality rates were 56.5% in MFMC cc versus 45.1% (UF cc) (P = 0.08). 5-year overall survival was 55.9% in MFMC cc vs. 64.7% UF cc, and the 10-year overall survival was 34.9% MFMC cc vs. 52.7% UF cc (P = 0.27). Median survival in MFMC cc was 78 months (6.5 years), whereas in UF cc it was 126 months (10.5 years). However, in the multivariate analysis, survival was independently influenced only by tumor size and the presence of axillary lymph node metastases (P multivariate analysis. PMID:26309666

  2. Study on the Key Success Factors of the Operation of a Regional Military Logistic Food Material Center

    Directory of Open Access Journals (Sweden)

    Fu-Jin Wang

    2010-01-01

    Full Text Available Problem statement: In order to establish an integrated supply system of the military food material, the study was to discuss the key success factors of operation of the military regional food material logistic center in Taiwan. Approach: The Delphi method, questionnaires and telephone interviews were used to collect and integrate the opinions of experts and scholars. Simultaneously, the Analytic Hierarchy Process (AHP was applied to confirm the evaluative factors of each level, i.e., one goal (to construct key success factors of the operation of a regional military logistic food material center for the first level, two analytical aspects (the external and internal environments for the second level, six evaluative facets (the safety design, strategic management, administrative effect, policy, service and internal and external integration for the third level and 19 evaluative criteria for the fourth level. Results: The 350 questionnaires from the second phase which were sent out to four kinds of respondents, 319 valid ones were returned. Conclusion: After AHP analysis, the results of this study could suggest an evaluation table for the key success factors of operation of the military regional food material logistic center in Taiwan.

  3. 儿童哮喘发病危险因素的logistic分析%Logistic Analysis on Risk Factors of Asthma among Children

    Institute of Scientific and Technical Information of China (English)

    李敏; 马士学

    2011-01-01

    目的 探讨儿童哮喘发病的危险因素,为制定干预对策与措施提供依据.方法 2009年3月-2010年10月间,采用多因素logistic回归分析,对滕州市中心人民医院确诊的2~14岁96例哮喘儿童进行病例对照调查.结果 有儿童呼吸道感染史、家族哮喘史、儿童过敏史、儿童特异性体质4个变量进入模型,OR值依次为22.31、14.89、13.65及8.23.结论 有儿童呼吸道感染史、家族哮喘史、儿童过敏史、儿童特应性体质是该人群哮喘发病的危险因素.%[Objective] To investigate the risk factors of asthma, and provide evidence for developing intervention strategies and measures. [Methods] A case control study with logistic regression analysis was performed on 96 childhood asthma cases aged 2-14 years diagnosed by Tengzhou Central Peoples Hospital from March 2009 to October 2010. [Results] Logistic regression multivariate analysis showed children with respiratory tract infection, family history of asthma, children's allergies, children's atopic constitution 4 variables were put into the model, OR values were 22. 31,14. 89,13. 65 and 8. 23. [Conclusion] The risk factors for asthma in this population were children with respiratory tract infection, family history of asthma, children's allergies, childrens,specific constitution.

  4. Application of ordinal logistic regression analysis in determining risk factors of child malnutrition in Bangladesh

    Directory of Open Access Journals (Sweden)

    Das Sumonkanti

    2011-11-01

    Full Text Available Abstract Background The study attempts to develop an ordinal logistic regression (OLR model to identify the determinants of child malnutrition instead of developing traditional binary logistic regression (BLR model using the data of Bangladesh Demographic and Health Survey 2004. Methods Based on weight-for-age anthropometric index (Z-score child nutrition status is categorized into three groups-severely undernourished ( Results All the models determine that age of child, birth interval, mothers' education, maternal nutrition, household wealth status, child feeding index, and incidence of fever, ARI & diarrhoea were the significant predictors of child malnutrition; however, results of PPOM were more precise than those of other models. Conclusion These findings clearly justify that OLR models (POM and PPOM are appropriate to find predictors of malnutrition instead of BLR models.

  5. Logistics competencies of polish companies as a factor of development of virtual supply chains

    Directory of Open Access Journals (Sweden)

    2010-03-01

    Full Text Available Problems of virtual organizations have not been well elaborated yet. There are many different concepts in that area. The concept of virtual organization can be formulated on the basis of its characteristic features. Generally, the following features have been indicated: temporary character, focusing on customers, geographical dispersion, intensive use of computer technologies, network organization and use of core competencies of the members. An example of virtual organization could be found in, so called, virtual supply chain, which demonstrates high degree of flexibility and is capable of easy adjustment to dynamic markets. Advanced logistics competencies of companies functioning in that supply chain and their ability to integrate closely with suppliers and customers become the basis of virtual supply chains operations. This paper presents the results of research in the group of Polish companies. As the result of the research more specific picture of the abilities of companies for their operation in virtual (extra-flexible supply chains has been presented. From the point of view of the use of alternative tools for logistics management, logistics providers seem to be the group of firms being the most opened for cooperation. It results directly from the profile of their market operations. Finally, a conclusion might be drawn that a growth of flexibility of virtual supply chains demands more profound specialization of companies constituting links of those chains.

  6. INFLUENCE OF TRANSPORT FACTOR ON STOCKS IN LOGISTICS CHAINS OF RESOURCE BEHAVIOU

    Directory of Open Access Journals (Sweden)

    I. A. Lebedeva

    2011-01-01

    Full Text Available The paper considers behaviour of material flows at stages of complicated  logistic industrial and transport systems. Key parameters of logistic delivery schemes are analyzed in the paper. The paper estimates an influence of a time parameter on the level of transport and logistics costs and, as a consequence, on  a final finished product.While determining a stock level it is necessary to know not only an intensity of material resource consumption by manufacturing process  for a concrete period of time, but also a probability of non-observance of   transport service terms and cost of stock storage. Stocks of mass cargoes are basically formed at first stages of industrial and transport system and cost of their storage is relatively insignificant. However deficit presence of the given resources influences on functioning of all subsequent interrelated stages of the industrial and transport system.Thus, a risk of deficit occurrence of the given resources can be probably reduced by creating a high stock rate. There is a processing of hi-tech component items (or half-finished products at last stages of the industrial and transport system. Expenses on storage of such resources  are usually high and possibility of their substitution by analogous ones is insignificant. At last stages a mobilization of facilities for provision of on-time delivery is more profitable that allows to save on stock arrangement.

  7. Innovation in product design as a factor for reducing logistic and production costs

    Directory of Open Access Journals (Sweden)

    Luciana Fighera Marzall

    2016-03-01

    Full Text Available Innovation has been considered of fundamental importance for organizations competing in dynamic environments, which along with cost management has been shown as an organizational strategy that allows the company to measure its results and implement measures that impact on the organization's performance as a whole. This paper, carried out in a metal mechanical industry of a telecommunications engineering branch, aims to analyse cost reduction in logistics raw materials areas through innovation in the product design, which are antennas and towers for telephone networks. In terms of methodology, this study presents itself as a qualitative and quantitative research-action, which from the link between theory and practice allows for intervention in the middle of the researchers studied. As a result, an innovative project was developed, which allowed for the reduction costs of production by 68% and logistics by 32%. Despite the significant decrease in costs, the quality of manufactured products not declined and customer needs were met, thus making the company more competitive against competitors. Not widespread in the literature, this analysis of the impact on logistics and production costs due to improvements in the project is the main contribution theoretical of this paper.

  8. Comprehensive Logistics

    CERN Document Server

    Gudehus, Timm

    2012-01-01

    Modern logistics comprises operative logistics, analytical logistics and management of logistic networks. Central task of operative logistics is the efficient supply of required goods at the right place within the right time. Tasks of analytical logistics are designing optimal networks and systems, developing strategies for planning, scheduling and operation, and organizing efficient order and performance processes. Logistic management plans, implements and operates logistic networks and schedules orders, stocks and resources. This reference-book offers a unique survey of modern logistics. It contains proven strategies, rules and tools for the solution of a multitude of logistic problems. The analytically derived algorithms and formulas can be used for the computer-based planning of logistic systems and for the dynamic scheduling of orders and resources in supply networks. They enable significant improvements of performance, quality and costs. Their application is demonstrated by several examples from industr...

  9. Influential factors of red-light running at signalized intersection and prediction using a rare events logistic regression model.

    Science.gov (United States)

    Ren, Yilong; Wang, Yunpeng; Wu, Xinkai; Yu, Guizhen; Ding, Chuan

    2016-10-01

    Red light running (RLR) has become a major safety concern at signalized intersection. To prevent RLR related crashes, it is critical to identify the factors that significantly impact the drivers' behaviors of RLR, and to predict potential RLR in real time. In this research, 9-month's RLR events extracted from high-resolution traffic data collected by loop detectors from three signalized intersections were applied to identify the factors that significantly affect RLR behaviors. The data analysis indicated that occupancy time, time gap, used yellow time, time left to yellow start, whether the preceding vehicle runs through the intersection during yellow, and whether there is a vehicle passing through the intersection on the adjacent lane were significantly factors for RLR behaviors. Furthermore, due to the rare events nature of RLR, a modified rare events logistic regression model was developed for RLR prediction. The rare events logistic regression method has been applied in many fields for rare events studies and shows impressive performance, but so far none of previous research has applied this method to study RLR. The results showed that the rare events logistic regression model performed significantly better than the standard logistic regression model. More importantly, the proposed RLR prediction method is purely based on loop detector data collected from a single advance loop detector located 400 feet away from stop-bar. This brings great potential for future field applications of the proposed method since loops have been widely implemented in many intersections and can collect data in real time. This research is expected to contribute to the improvement of intersection safety significantly.

  10. Multivariate meta-analysis of prognostic factor studies with multiple cut-points and/or methods of measurement.

    Science.gov (United States)

    Riley, Richard D; Elia, Eleni G; Malin, Gemma; Hemming, Karla; Price, Malcolm P

    2015-07-30

    A prognostic factor is any measure that is associated with the risk of future health outcomes in those with existing disease. Often, the prognostic ability of a factor is evaluated in multiple studies. However, meta-analysis is difficult because primary studies often use different methods of measurement and/or different cut-points to dichotomise continuous factors into 'high' and 'low' groups; selective reporting is also common. We illustrate how multivariate random effects meta-analysis models can accommodate multiple prognostic effect estimates from the same study, relating to multiple cut-points and/or methods of measurement. The models account for within-study and between-study correlations, which utilises more information and reduces the impact of unreported cut-points and/or measurement methods in some studies. The applicability of the approach is improved with individual participant data and by assuming a functional relationship between prognostic effect and cut-point to reduce the number of unknown parameters. The models provide important inferential results for each cut-point and method of measurement, including the summary prognostic effect, the between-study variance and a 95% prediction interval for the prognostic effect in new populations. Two applications are presented. The first reveals that, in a multivariate meta-analysis using published results, the Apgar score is prognostic of neonatal mortality but effect sizes are smaller at most cut-points than previously thought. In the second, a multivariate meta-analysis of two methods of measurement provides weak evidence that microvessel density is prognostic of mortality in lung cancer, even when individual participant data are available so that a continuous prognostic trend is examined (rather than cut-points). © 2015 The Authors. Statistics in Medicine Published by John Wiley & Sons Ltd.

  11. A latent dynamic factor approach to forecasting multivariate stock market volatility

    OpenAIRE

    Gribisch, Bastian

    2013-01-01

    This paper proposes a latent dynamic factor model for low- as well as high-dimensional realized covariance matrices of stock returns. The approach is based on the matrix logarithm and allows for flexible dynamic dependence patterns by combining common latent factors driven by HAR dynamics and idiosyncratic AR(1) factors. The model accounts for symmetry and positive definiteness of covariance matrices without imposing parametric restrictions. Simulated Bayesian parameter estimates as well as p...

  12. Multivariate Analysis of Risk Factors in the Development of a Lower-Pitched Voice After Thyroidectomy.

    Science.gov (United States)

    Park, Jun-Ook; Bae, Ja-Sung; Lee, So-Hee; Shim, Mi-Ran; Hwang, Yeon-Shin; Joo, Young-Hoon; Park, Young Hak; Sun, Dong-Il

    2017-02-01

    Thyroid surgeons frequently encounter outpatients with mobile vocal cords complaining of lower-pitched voices following thyroidectomy. This study investigated the clinical and pathological parameters affecting voice pitch following thyroid surgery. We analyzed the data of 393 patients with mobile vocal cords and who also underwent thyroid surgery. Speaking fundamental frequency (SFF) and fundamental frequency (F0) were compared before and after surgery. Approximately 26.7% of patients had significantly lowered SFFs (ΔSFF ≥ 12 Hz), and 30.2% exhibited significantly lower sustained vowel F0s (ΔF0 ≥ 12 Hz) following thyroid surgery. On multivariate analysis, only gender: female remained a significant predictor of a clinically significant change in SFF following thyroid surgery ( P < .001). Gender: female and extent of surgery: total remained significant predictors of a clinically significant change in F0 after surgery ( P = .006 and P = .007, respectively). Appreciable proportions of patients experience lower-pitched voice and related vocal symptoms early after thyroid surgery. Such problems develop more frequently in females who underwent total thyroidectomy.

  13. Current Practice of Heart Donor Evaluation in Germany: Multivariable Risk Factor Analysis Confirms Practicability of Guidelines

    Directory of Open Access Journals (Sweden)

    Sylke Ruth Zeissig

    2013-01-01

    Full Text Available Background. Organ shortage has liberalised the acceptance criteria of grafts for heart transplantation, but which donor characteristics ultimately influence the decision to perform transplantation? For the first time this was evaluated using real-time donor data from the German organ procurement organization (DSO. Observed associations are discussed with regard to international recommendations and guidelines. Methods. 5291 German donors (2006–2010 were formally eligible for heart donation. In logistic regression models 160 donor parameters were evaluated to assess their influence on using grafts for transplantation (random split of cases: 2/3 study sample, 1/3 validation sample. Results. Successful procurement was determined by low donor age (OR 0.87 per year; 95% CI [0.85–0.89], P<0.0001, large donor height (OR 1.04 per cm; 95% CI [1.02–1.06], P<0.0001, exclusion of impaired left ventricular function or wall motion (OR 0.01; 95% CI [0.002–0.036], P<0.0001, arrhythmia (OR 0.05; 95% CI [0.009–0.260], P=0.0004, and of severe coronary artery disease (OR 0.003; 95% CI [<0.001–0.01], P<0.0001. Donor characteristics differed between cases where the procedure was aborted without and with allocation initiated via Eurotransplant.

  14. Multivariate statistical study with a factor analysis of foraminiferal fauna from the Chilka Lake, India

    Digital Repository Service at National Institute of Oceanography (India)

    Jayalakshmy, K.V.; Rao, K.K.

    Foraminiferal fauna from the surface sediments of the Chilka Lake along the east coast of India has been studied as regards distribution of its assemblages. From Q-mode factor analysis of the data, eight significant factor groups for species have...

  15. Quantitative Analyses in a Multivariate Study of Language Attrition: The Impact of Extralinguistic Factors

    Science.gov (United States)

    Schmid, Monika S.; Dusseldorp, Elise

    2010-01-01

    Most linguistic processes--acquisition, change, deterioration--take place in and are determined by a complex and multifactorial web of language internal and language external influences. This implies that the impact of each individual factor can only be determined on the basis of a careful consideration of its interplay with all other factors. The…

  16. Application of ordinal logistic regression analysis in determining risk factors of child malnutrition in Bangladesh.

    Science.gov (United States)

    Das, Sumonkanti; Rahman, Rajwanur M

    2011-11-14

    The study attempts to develop an ordinal logistic regression (OLR) model to identify the determinants of child malnutrition instead of developing traditional binary logistic regression (BLR) model using the data of Bangladesh Demographic and Health Survey 2004. Based on weight-for-age anthropometric index (Z-score) child nutrition status is categorized into three groups-severely undernourished (malnutrition and severe malnutrition if the proportional odds assumption satisfies. The assumption is satisfied with low p-value (0.144) due to violation of the assumption for one co-variate. So partial proportional odds model (PPOM) and two BLR models have also been developed to check the applicability of the OLR model. Graphical test has also been adopted for checking the proportional odds assumption. All the models determine that age of child, birth interval, mothers' education, maternal nutrition, household wealth status, child feeding index, and incidence of fever, ARI & diarrhoea were the significant predictors of child malnutrition; however, results of PPOM were more precise than those of other models. These findings clearly justify that OLR models (POM and PPOM) are appropriate to find predictors of malnutrition instead of BLR models.

  17. Logistic regression analysis on risk factors of endometrial cancer%子宫内膜癌患病的危险因素Logistic回归分析

    Institute of Scientific and Technical Information of China (English)

    曾艳华

    2012-01-01

    目的:探讨金坛市子宫内膜癌发病的危险因素.方法:采用病例对照研究,选择2005年12月~2011年6月在金坛市人民医院妇产科就诊并经过病理诊断为子宫内膜癌的患者165例为病例组,同时选择528例健康体检者为对照组,采用单因素与多因素非条件Logistic回归分析子宫内膜癌发病的危险因素.结果:单因素分析表明,年龄≤50岁、年龄≥61岁、BMI超重、患有高血压、患有糖尿病、月经初潮年龄≤12岁、初次分娩年龄≤20岁、一级亲属中有乳癌、子宫内膜癌、结肠癌、卵巢癌患病史与子宫内膜癌发病有关.通过多因素Logistic逐步回归分析,最终引入回归方程的变量为年龄≤50岁、年龄≥61岁、BMI超重、患有高血压、患有糖尿病、月经初潮年龄≤12岁、一级亲属中有结肠癌及卵巢癌患病史.结论:年龄≥61岁、BMI超重、患有高血压、患有糖尿病、月经初潮年龄≤12岁、一级亲属中有结肠癌及卵巢癌患病史是子宫内膜癌发病的危险因素,年龄≤50岁是子宫内膜癌发病的保护因素.%Objective; To explore the risk factors of endometrial cancer in Jintan city. Methods: A case - control study was conducted, 165 patients who were treated and diagnosed as endometrial cancer by pathological examination in the hospital from December 2005 to June 2011 were selected as case group, and 528 healthy women after physical examination during the same period were selected as control group, univariate and multivariate logistic regression analysis were used to analyze the risk factors of endometrial cancer. Results; Univariate logistic regression analysis showed that ≤ 50 years old, ≥ 61 years old, BMI overweight, hypertension, diabetes mellitus, age of menarche ≤ 12 years, age of primiparity≤ 20 years, medical histories of breast cancer, endometrial cancer, colon cancer, and ovarian cancer in first - degree relatives were correlated with prevalence

  18. Multivariate Modeling Identifies Neutrophil- and Th17-Related Factors as Differential Serum Biomarkers of Chronic Murine Colitis

    Science.gov (United States)

    McBee, Megan E.; Zeng, Yu; Parry, Nicola; Nagler, Cathryn R.; Tannenbaum, Steven R.

    2010-01-01

    Background Diagnosis of chronic intestinal inflammation, which characterizes inflammatory bowel disease (IBD), along with prediction of disease state is hindered by the availability of predictive serum biomarker. Serum biomarkers predictive of disease state will improve trials for therapeutic intervention, and disease monitoring, particularly in genetically susceptible individuals. Chronic inflammation during IBD is considered distinct from infectious intestinal inflammation thereby requiring biomarkers to provide differential diagnosis. To address whether differential serum biomarkers could be identified in murine models of colitis, immunological profiles from both chronic spontaneous and acute infectious colitis were compared and predictive serum biomarkers identified via multivariate modeling. Methodology/Principal Findings Discriminatory multivariate modeling of 23 cytokines plus chlorotyrosine and nitrotyrosine (protein adducts from reactive nitrogen species and hypochlorite) in serum and tissue from two murine models of colitis was performed to identify disease-associated biomarkers. Acute C. rodentium-induced colitis in C57BL/6J mice and chronic spontaneous Helicobacter-dependent colitis in TLR4−/− x IL-10−/− mice were utilized for evaluation. Colon profiles of both colitis models were nearly identical with chemokines, neutrophil- and Th17-related factors highly associated with intestinal disease. In acute colitis, discriminatory disease-associated serum factors were not those identified in the colon. In contrast, the discriminatory predictive serum factors for chronic colitis were neutrophil- and Th17-related factors (KC, IL-12/23p40, IL-17, G-CSF, and chlorotyrosine) that were also elevated in colon tissue. Chronic colitis serum biomarkers were specific to chronic colitis as they were not discriminatory for acute colitis. Conclusions/Significance Immunological profiling revealed strikingly similar colon profiles, yet distinctly different serum

  19. 军民物流融合发展的影响要素、机制及发展模式研究%Research on Factors, Mechanism and Development Model of Military Logistics and the Civilian Logistics Converging Development

    Institute of Scientific and Technical Information of China (English)

    张中强

    2011-01-01

    探讨了我国军事物流与民用物流的融合发展.首先,论述了军事物流与民用物流的相互关系,在此基础上解析了军民物流融合发展的影响要素,这些要素包括专业化的第三方物流、物流信息与技术、社会动员物流、第四方物流管理等.它们相互作用、相互促进,每一个要素的变化都将在整体上对军民物流的融合发展带来倍率效应.然后,探讨了保证与支撑这些要素有序健康发展的融合发展机制,把这种融合发展机制分为形成机制、成长机制和协调机制,并分别加以阐述.在这种机制的保证下,最后给出了各要素互动共生、协作发展的军民物流融合发展模式.%This article discusses the converging development of military logistics and the civilian logistics. First, the author discusses the relationship between military logistics and the civil logistics, then analysis the influence factors of the civilian and military logistics converging development, which including specialized third party logistics, logistics information and technology, social mobilization logistics, the fourth party logistics management, etc. The factors are mutual interactions and promotions. The change of each factors will bring the bring rate effect to the whole system. Second, the article discussed the mechanism to guarantee and support these factors fusion. The mechanism is divided into formation mechanism, growth mechanism and coordination mechanism, and explained respectively. Finally, the author suggests the model of interaction and mutualism, converging development between military and civilian logistics.

  20. Logistic Regression Analysis and Nursing Interven-tions for High-risk Factors for Pressure Sores in Pa-tients in a Surgical Intensive Care Unit

    Institute of Scientific and Technical Information of China (English)

    Xin-Ran Wang∗; Bin-Ru Han

    2015-01-01

    Objective: To investigate the risk factors related to the development of pressure sores in critically ill surgical patients and to establish a basis for the formulation of effective precautions. Methods: A questionnaire regarding the factors for pressure sores in critically ill surgical patients was created using a case control study with reference to the pertinent literature. After being exam-ined and validated by experts, the questionnaire was used to collect data about critically ill surgical patients in a grade A tertiary hospital. Among the 47 patients enrolled into the study, the 14 who developed nosocomial pressure sores were allocated to the pressure sore group, and the remaining 33 patients who met the inclusion criteria and did not exhibit pressure sores were allocated to the control group. Univariate and multivariate logistic regression analyses were employed to examine the differences in 22 indicators between the two groups in an attempt to identify the risk factors for pressure sores. Results: According to the univariate analyses, the maximum value of lactic acid in the arterial blood, the number of days of norepinephrine use, the number of days of mechanical ventilation, the number of days of blood purification, and the number of days of bowel incontinence were sta-tistically greater in the pressure sore group than in the control group ( P Conclusions: The best method for preventing and control pressure sores in surgical critically ill patients is to strongly emphasize the duration of the critical status and to give special attention to patients in a continuous state of shock. The adoption of measures specific to high-risk patient groups and risk factors, including the active control of primary diseases and the application of de-compression measures during the treatment of the patients, are helpful for improving the quality of care in the prevention and control of pressure sores in critically ill patients.

  1. How to Assess Performance in Cycling: the Multivariate Nature of Influencing Factors and Related Indicators.

    Directory of Open Access Journals (Sweden)

    Anna Margherita eCastronovo

    2013-05-01

    Full Text Available Finding an optimum for the cycling performance is not a trivial matter, since the literature shows the presence of many controversial aspects. In order to quantify different levels of performance, several indexes have been defined and used in many studies, reflecting variations in physiological and biomechanical factors. In particular, indexes such as Gross Efficiency (GE, Net Efficiency (NE and Delta Efficiency (DE have been referred to changes in metabolic efficiency (EffMet, while the Indexes of Effectiveness (IE, defined over the complete crank revolution or over part of it, have been referred to variations in mechanical effectiveness (EffMech. All these indicators quantify the variations of different factors (i.e. muscle fibers type distribution, pedaling cadence, setup of the bicycle frame, muscular fatigue, environmental variables, ergogenic aids, psychological traits, which, moreover, show high mutual correlation. In the attempt of assessing cycling performance, most studies in the literature keep all these factors separated. This may bring to misleading results, leaving unanswered the question of how to improve cycling performance. This work provides an overview on the studies involving indexes and factors usually related to performance monitoring and assessment in cycling. In particular, in order to clarify all those aspects, the mutual interactions among these factors are highlighted, in view of a global performance assessment. Moreover, a proposal is presented advocating for a model-based approach that considers all factors mentioned in the survey, including the mutual interaction effects, for the definition of an objective function E representing the overall effectiveness of a training program in terms of both metabolic efficiency and mechanical effectiveness.

  2. A dynamic factor model for the analysis of multivariate time series

    NARCIS (Netherlands)

    Molenaar, P.C.M.

    1985-01-01

    Describes the new statistical technique of dynamic factor analysis (DFA), which accounts for the entire lagged covariance function of an arbitrary 2nd-order stationary time series. DFA is shown to be applicable to a relatively short stretch of observations and is therefore considered worthwhile for

  3. Determination of the main risk factors for benzodiazepine dependence using a multivariate and multidimensional approach.

    NARCIS (Netherlands)

    Kan, C.C.; Hilberink, S.R.; Breteler, M.H.M.

    2004-01-01

    The aim of this study was to identify risk factors for benzodiazepine (BZD) dependence, such as sociodemographic variables, characteristics of BZD use, and psychiatric parameters, which to date have been found to relate inconsistently to indicators of BZD dependence such as chronic BZD use and BZD w

  4. Quantitative analyses in a multivariate study of language attrition : the impact of extralinguistic factors

    NARCIS (Netherlands)

    Schmid, Monika S.; Dusseldorp, Elise

    2010-01-01

    Most linguistic processes - acquisition, change, deterioration - take place in and are determined by a complex and multifactorial web of language internal and language external influences. This implies that the impact of each individual factor can only be determined on the basis of a careful conside

  5. Quantitative analyses in a multivariate study of language attrition: The impact of extralinguistic factors

    NARCIS (Netherlands)

    Schmid, M.S.; Dusseldorp, E.

    2010-01-01

    Most linguistic processes - acquisition, change, deterioration - take place in and are determined by a complex and multifactorial web of language internal and language external influences. This implies that the impact of each individual factor can only be determined on the basis of a careful conside

  6. Gastrointestinal symptoms in patients undergoing peritoneal dialysis: Multivariate analysis of correlated factors

    Institute of Scientific and Technical Information of China (English)

    2010-01-01

    AIM: To investigate gastrointestinal (GI) symptoms in peritoneal dialysis (PD) patients and to explore related factors contributing to GI symptoms. METHODS: One hundred and twelve patients undergoing PD participated in the study. The gastrointestinal symptom rating scale was used for measuring GI symptoms. Information on age, height, weight, body mass index, disease leading to chronic renal failure, history of corticosteroid therapy, presence of predialytic GI symptoms, daily dosage of pills, and duration, ...

  7. Macro-Logistics Decision Factors and Information Measures for Scanning Global (Supply Chain) Environments in International Location Choice

    DEFF Research Database (Denmark)

    Kinra, Aseem

    2012-01-01

    reviews and content analyses. Finally, the study employs expert opinions in order to validate these factors and information measures and to present the findings in the form of a decision hierarchy. The findings suggest the importance of 17 generic decision factors at the macro-economic (country) level......value chains and supply chain management. This scope is usually accompanied by uncertainty to organisations, especially for the cross-border value chain with geographically dispersed operations and activities, and poses environmental complexity in the form of risks and costs that organisations need......-logistics factors that pose international uncertainty in cross-border flows of goods, information, payment and ownership. Similarly, a list of information measures that are relevant in scanning against this international uncertainty is also developed. For this purpose, the study deploys integrated literature...

  8. Reverse Logistics

    OpenAIRE

    Kulikova, Olga

    2016-01-01

    This thesis was focused on the analysis of the concept of reverse logistics and actual reverse processes which are implemented in mining industry and finding solutions for the optimization of reverse logistics in this sphere. The objective of this paper was the assessment of the development of reverse logistics in mining industry on the example of potash production. The theoretical part was based on reverse logistics and mining waste related literature and provided foundations for further...

  9. Investigating the Effect of Complexity Factors in Stoichiometry Problems Using Logistic Regression and Eye Tracking

    Science.gov (United States)

    Tang, Hui; Kirk, John; Pienta, Norbert J.

    2014-01-01

    This paper includes two experiments, one investigating complexity factors in stoichiometry word problems, and the other identifying students' problem-solving protocols by using eye-tracking technology. The word problems used in this study had five different complexity factors, which were randomly assigned by a Web-based tool that we developed. The…

  10. Investigating the Effect of Complexity Factors in Stoichiometry Problems Using Logistic Regression and Eye Tracking

    Science.gov (United States)

    Tang, Hui; Kirk, John; Pienta, Norbert J.

    2014-01-01

    This paper includes two experiments, one investigating complexity factors in stoichiometry word problems, and the other identifying students' problem-solving protocols by using eye-tracking technology. The word problems used in this study had five different complexity factors, which were randomly assigned by a Web-based tool that we developed. The…

  11. Conditional Logistic Regression on Influencing Factors of Fall Injuries among Undergraduates%大学生跌落伤危险因素条件Logistic回归分析

    Institute of Scientific and Technical Information of China (English)

    许珊丹; 向兵; 张玲

    2011-01-01

    目的:探讨大学生跌落伤发生的危险因素,为制定有效的干预措施提供理论依据.方法:采用分层整群随机抽样方法,调查武汉市某医学院1219名在校大学生,从中获取跌落伤病例65例为病例,采用1:1配对病例对照研究方法获得对照.对65对大学生进行视力、注意力以及心理状况测试.结果:多因素条件Logistic回归分析结果显示,视力状况、注意力集中品质差、抑郁、焦虑是大学生跌落伤的危险因素.结论:大学生跌落伤与自身个体特质有关,视力不良、注意力集中品质差、经常抑郁和焦虑的大学生容易发生跌落伤,应对这些人群采取相应的干预措施,避免跌落伤的发生.%Objective:To study the influencing factor of fall injuries among undergraduates and to provide a theoretical basis for effective prevention measures. Methods: 1219 undergraduates were recruited and 65 injured cases were obtained by stratified and cluster random sampling. The control group was obtained by 1:1 matched case control study. The visual acuity, attention and psychologic status were tested in 65 pair cases and data was analyzed by single factor conditional logistic regression analysis and multivariate analysis was performed by condition logistic regression model. Results: Poor eyesight ,lack of concentration,depression and anxiety were risk factors of fall injuries. Conclusion: Fall injuries of college students had a correlation with personality characteristics. Undergraduates with poor eyesight ,lack of concentration.de-pression and anxiety are more likely to be injured. The effective measures should be taken on such college students to prevent the fall injuries.

  12. Multivariate sensitivity analysis to measure global contribution of input factors in dynamic models

    Energy Technology Data Exchange (ETDEWEB)

    Lamboni, Matieyendou [INRA, Unite MIA (UR341), F78352 Jouy en Josas Cedex (France); Monod, Herve, E-mail: herve.monod@jouy.inra.f [INRA, Unite MIA (UR341), F78352 Jouy en Josas Cedex (France); Makowski, David [INRA, UMR Agronomie INRA/AgroParisTech (UMR 211), BP 01, F78850 Thiverval-Grignon (France)

    2011-04-15

    Many dynamic models are used for risk assessment and decision support in ecology and crop science. Such models generate time-dependent model predictions, with time either discretised or continuous. Their global sensitivity analysis is usually applied separately on each time output, but Campbell et al. (2006) advocated global sensitivity analyses on the expansion of the dynamics in a well-chosen functional basis. This paper focuses on the particular case when principal components analysis is combined with analysis of variance. In addition to the indices associated with the principal components, generalised sensitivity indices are proposed to synthesize the influence of each parameter on the whole time series output. Index definitions are given when the uncertainty on the input factors is either discrete or continuous and when the dynamic model is either discrete or functional. A general estimation algorithm is proposed, based on classical methods of global sensitivity analysis. The method is applied to a dynamic wheat crop model with 13 uncertain parameters. Three methods of global sensitivity analysis are compared: the Sobol'-Saltelli method, the extended FAST method, and the fractional factorial design of resolution 6.

  13. LOGISTIC REGRESSION ANALYSIS OF RISK FACTORS OF COPD IN RURAL AREAS OF FENGKAI%封开农村地区COPD相关危险因素的 Logistic 回归分析

    Institute of Scientific and Technical Information of China (English)

    钱形邦; 梁洪雁; 李秋生; 侯浩联; 侯秋华; 植彩雄

    2015-01-01

    Objective To study the prevalence and relevant risk factors of chronic obstructive pulmonary disease( COPD) in Fengkai rural areas, in order to provide scientific proof for the effective prevention of COPD.Methods The cluster-random-sampling method was performed to collect the data from 1386 cases ( aged over 40 years) in Fengkai rural areas.All the subjects were interviewed with questionnaires and tested with spirometry.A single factor and multivariate unconditional Logistic analysis of COPD incidence of relevant risk factors was performed.Results (1)The total prevalence of COPD was 10.24%;(2) The relevant risk factors of COPD:age (OR=4.002,95%, CI=2.339~7.605), smoking (OR=3.846, 95%CI=1.925~7.564), occupational dust expo-sure (OR=5.339, 95%CI=3.062~9.743), wood and coal fire (OR=1.206, 95%CI=0.895~2.666), poor kitchen ventilation equipment (OR=2.599, 95%CI=1.056~4.009), bad cooking habits (OR=1.408, 95%CI=0.758~2.255), and personal history of lung disease (OR=1.296, 95%, CI=1.015~2.847).Conclusion The incidence of COPD is the outcome of combined action of multiple factors.Use of cleaner fuels and improved ven-tilation may reduce the incidence of COPD.%目的 了解封开农村地区慢性阻塞性肺疾病( COPD)的患病率及相关危险因素,为COPD的有效干预提供科学依据. 方法 以整群抽样随机分层方法对封开县农村地区1 386例调查对象(年龄≥40岁)进行问卷调查及肺功能检测,采用单因素和多因素非条件Logistic回归分析COPD发病的相关危险因素.结果 本农村地区COPD总患病率为10畅24%; COPD相关危险因素分析显示:年龄( OR=4.002,95%CI=2.339~7.605)、吸烟(OR=3.846,95%CI=1.925 ~7.564)、职业粉尘暴露(OR=5.339,95%CI=3.062 ~9.743)、烧柴烧煤(OR=1.206,95%CI=0.895 ~2.666)、厨房通风设备差(OR=2.599,95%CI =1.056 ~4.009)、不良烹饪习惯(OR=1.408,95%CI=0.758~2.255)和肺部疾病个人史(OR=1.296,95%CI=1.015~2.847). 结论 COPD发病是多种因素相互作用的结

  14. Logistic Retrogression Model for Evaluating the Influence of Environmental Factors on Legislative Data

    Directory of Open Access Journals (Sweden)

    Jennifer Somali Angeyo

    2014-09-01

    Full Text Available Applicability of artificial intelligence techniques, in evaluating the influence of the environmental factors in legislative data was found amenable in an earlier study - SVM performed to satisfying results with a 21.5 percent error rate for passage of legislation as compared to the performance of ANN at 28 percent error rate and K-NN at 29 percent error rate. These techniques reported both collective influence (ANN, K-NN and SVM and respective influence (SVM one-against-all classifier. Determining the environmental influences - individually or in combination with other factors, could only be measurably achieved using other modeling techniques, despite SVM with probabilistic output of 76 percent outperforming PNN with 71 percent out. A triangulation of both statistical and artificial intelligence modeling techniques in classification is thus proposed for decision making support in legislative drafting, given that computations involving statistical approach correctly predicted up to 98.20 percent and placed economic considerations as the most important factor for the passing of a bill with economic connotations. Other predictions involving political, social, cultural factors did not however, perform as well as the PNN and SVM with probabilistic output.

  15. Multivariate analysis of factors influencing the effect of radiosynovectomy; Multivariate Analyse der Einflussfaktoren auf die Wirkung der Radiosynoviorthese bei entzuendlichen Gelenkerkrankungen

    Energy Technology Data Exchange (ETDEWEB)

    Farahati, J.; Schulz, G.; Koerber, C.; Geling, M.; Schmeider, P.; Reiners, Chr. [Wuerzburg Univ. (Germany). Klinik fuer Nuklearmedizin; Wendler, J. [Erlangen-Nuernberg Univ. (Germany). Klinik fuer Innere Medizin III; Kenn, W. [Wuerzburg Univ. (Germany). Inst. fuer Roentgendiagnostik; Reidemeister, C. [Wuerzburg Univ. (Germany). Klinik fuer Innere Medizin

    2002-04-01

    Objective: In this prospective study, the time to remission after radiosynovectomy (RSV) was analyzed and the influence of age, sex, underlying disease, type of joint, and duration of illness on the success rate of RSV was determined. Methods: A total number of 57 patients with rheumatoid arthritis (n = 33) and arthrosis (n = 21) with a total number of 130 treated joints (36 knee, 66 small and 28 medium-size joints) were monitored using visual analogue scales (VAS) from one week before RSV up to four to six months after RSV. The patients had to answer 3 times daily for pain intensity of the treated joint. The time until remission was determined according to the Kaplan-Meier survivorship function. The influence of the prognosis parameters on outcome of RSV was determined by multivariate discriminant analysis. Results: After six months, the probability of pain relief of more than 20% amounted to 78% and was significantly dependent on the age of the patient (p = 0.02) and the duration of illness (p = 0.05), however not on sex (p = 0.17), underlying disease (p = 0.23), and type of joint (p = 0.69). Conclusion: Irrespective of sex, type of joint and underlying disease, a measurable pain relief can be achieved with RSV in 78% of the patients with synovitis, whereby effectiveness is decreasing with increasing age and progress of illness. (orig.) [German] Ziel: In dieser prospektiven Studie wurde die Zeit bis zur Remission nach einer Radiosynoviorthese (RSO) untersucht. Ebenso wurde der Einfluss von Alter, Geschlecht, Grunderkrankung, Gelenktyp und Erkrankungsdauer auf die Erfolgsrate der RSO ermittelt. Methodik: Bei insgesamt 57 Patienten mit rheumatoider Arthritis (n = 33) und Arthritis bei aktivierter Arthrose (n = 24) wurden 130 Gelenke (36 Kniegelenke, 66 kleine und 28 mittelgrosse Gelenke) behandelt. Die Patienten wurden unter Verwendung so genannter visueller Analogskalen eine Woche vor RSO und vier bis sechs Monate danach 3-mal taeglich zur Schmerzintensitaet des

  16. 258例儿童哮喘危险因素的Logistic回归分析%Logistic regression analysis on risk factors of 258 children with asthma

    Institute of Scientific and Technical Information of China (English)

    李晶; 侯丽影; 周雅燕

    2012-01-01

    目的:探讨哮喘的相关危险因素,为儿童哮喘的防治提供参考.方法:以258例儿童哮喘患者为观察组,同时从门诊随机抽取240例无哮喘病史的人群作为对照组.应用非条件Logistic回归分析进行多因素分析.结果:单因素分析结果表明:两组间上呼吸道感染、运动、天气变化、情绪变化、饮食、鼻炎、个人过敏史、家族过敏史、家族哮喘史比较差异有统计学意义(P<0.05).多因素分析结果表明:上呼吸道感染、运动、饮食、鼻炎、个人过敏史、家族过敏史、家族哮喘史是儿童发生哮喘的独立危险因素(P<0.05).结论:上呼吸道感染、运动、饮食、鼻炎、个人过敏史、家族过敏史、家族哮喘史是儿童发生哮喘的独立危险因素,对这些危险因素进行必要的干预可能降低哮喘的发生率.%Objective: To explore the related risk factors ol asthma, and provide reference for prevention and treatment of children with asthma. Methods: A total of 258 children with asthma were selected as observation group, meanwhile, 240 cases without asthma were selected from outpatient department of the hospital as control group, non - conditional logistic regression analysis was performed for multivari-ate analysis. Results: The results of univariate regression analysis showed that there was statistically significant difference in the incidence of upper respiratory tract infection, sports, changes of weather, changes of emotion , diet, rhinitis, personal allergic history, family allergic history, and family asthmatic history between the two groups (P <0. 05) . The results of multivariate regression analysis showed that upper respiratory tract infection, sports, diet, rhinitis, personal allergic history, family allergic history, and family asthmatic history were independent risk factors of asthma in children, there was statistical significance (P<0. 05) . Conclusion: Upper respiratory tract infection, sports, diet

  17. Logistic regression analysis about the risk factors of small for gestational age%小于胎龄儿的高危因素Logistic回归分析

    Institute of Scientific and Technical Information of China (English)

    李盛强; 周守方; 袁贵龙

    2012-01-01

    目的:探讨小于胎龄儿的主要危险因素,为制定适宜的预防和干预措施提供科学依据.方法:选择2008~2009年单胎活产小于胎龄儿59例作为病例组,采用完全随机抽样方法选取出生体重在10%~90%分位的适于胎龄儿65例作为对照组.比较两组的胎龄、生长激素、胰岛素抵抗、镁离子浓度、孕妇体质指数、疾病情况、孕妇年龄、父亲吸烟、酗酒等,对上述资料先进行单因素分析,在此基础上选择有统计学差异的变量进行多因素非条件Logistic回归分析.结果:小于胎龄儿在生长激素、镁离子浓度、妊娠年龄方面明显低于适于胎龄儿,差异有统计学意义(P<0.05).小于胎龄儿在胰岛素抵抗水平、妊娠高血压、父亲酗酒率、父亲吸烟率方面明显高于适于胎龄儿,差异有统计学意义(P<0.05).Logistic回归分析表明,镁离子浓度、妊娠年龄、父亲酗酒可作为小于胎龄儿的独立相关因素.结论:镁离子可能是胎儿生长发育的重要调控因子;孕妇的妊娠年龄小和父亲的酗酒会使小于胎龄儿产生的几率大大增加.%Objective: To study the main risk factors of small for gestational age (SGA) infant and to provide scientific basis for appropriate prevention and intervention measure. Methods: The SGA group included 59 singleton alive SGA delivered in our hospital during January 2008 to December 2009, 65 cases were randomly selected by birth weight of 10% to 90% of its spaces appropriate for AGA and taken as a control group. Two groups were compared in gestation age, growth hormone, insulin resistance, density of magnesium ion, pregnant women's physique index, disease situation, pregnant women's age, father smoke, get drunk, etc. Simple logistic regression analysis was performed for all the risk factors, and variables with statistical significance were chosen for multivariate and unconditioned logistic regression analysis. Results: The levels of

  18. Multivariate Logistic Regression Analysis of Anxiety and Depression in Peritoneal Dialysis Patients%腹膜透析患者焦虑和抑郁的多因素Logistic回归分析

    Institute of Scientific and Technical Information of China (English)

    陈伟; 黄燕林

    2011-01-01

    Objective To study the risk factors of anxiety and depression in peritoneal dialysis patients and to provide evidence of psychological intervention on patients for clinical nurses.Methods 169 patients with peritoneal dialysis were surveyed with SelfRating Anxiety Scale (SAS) and Self-Rating Depression Scale (SDS).The data were analyzed by multi-factor Logistic regression analysis.Results Mean score of anxiety was (41.24±9.11) and depression (48.71±12.06).The incidences of anxiety and depression were 17.8% and 52.6% respectively.Independent factors for anxiety were working status, age, dry skin, skin itching, mid upper arm circumference.Independent factors for depression were education background, medical expenses, working status, appetite, grip strength, calf circumference, edema and skin itching.Conclusion Many factors contributed to anxiety and depression of peritoneal dialysis patients.Medical staff should pay more attention to the psychological status of peritoneal dialysis patients who with different conditions during the implementation of psychological intervention.%目的 探讨腹膜透析患者焦虑和抑郁状况及其危险因素,为临床护士对患者心理干预提供依据.方法 选取169例腹膜透析患者,应用Zung's 的焦虑自评量表、抑郁自评量表评估患者的焦虑和抑郁症状,并对影响因素进行单因素及多因素Logistic 回归分析.结果 患者焦虑得分为(41.24±9.11)分,抑郁得分为(48.71±12.06)分.焦虑发生率为17.8%,抑郁发生率为52.6%.焦虑发生的独立危险因素为工作状况、皮肤干燥、皮肤瘙痒、上臂中点围、年龄.抑郁发生的独立危险因素为文化程度、医疗费用、工作状况、食欲、握力、小腿围、有无浮肿、皮肤瘙痒.结论腹膜透析患者存在焦虑抑郁情绪,焦虑和抑郁的发生与多种因素有关.医务人员应重视腹膜透析患者的心理状况,针对患者不同情况实施心理干预.

  19. Traffic safety as a factor of improving logistics in construction sector

    Directory of Open Access Journals (Sweden)

    Ognjenovic Slobodan

    2016-01-01

    Full Text Available Security is a complex problem. It includes the driver’s behavior, the features of the vehicle, those of the road and the driving conditions. Security can be approached from the aspect of the vehicle and pavement design, of driving habits, traffic regulation and application of laws. The good coordination of the driver, the vehicle and the road enables for better estimation of the traffic safety relations and interrelations giving the possibilities of improvement of the situation at present and in future. The driver has the main role in the determination of the success or failure of the road system. Over 90% of the accidents are due to improper behavior of people in traffic. Understanding of the human factors is the key factor in the optimal road design and traffic flow. Nevertheless, engineers need more understanding about driving behavior, as they are responsible for road design, for the traffic flow, and for the regulations intended to avoid errors wherever possible. The purpose of this paper is to inform about the current situation both in practice and in the researches of traffic safety, as well as to yield a broader review of the actual traffic safety situation on the roads in Republic of Macedonia.

  20. Multivariate analysis of risk factors for the persistence of high-grade squamous intraepithelial lesions following loop electrosurgical excision procedure.

    Science.gov (United States)

    Dos Santos Melli, Patrícia P; Duarte, Geraldo; Quintana, Silvana M

    2016-05-01

    To evaluate risk factors related to the persistence of high-grade squamous intraepithelial lesions (HSILs) following loop electrosurgical excision procedure (LEEP). The present prospective, observational study evaluated a convenience sample of participants with HSILs who were treated using LEEP between January 7, 2003 and December 30, 2011. Participants were evaluated 6months and 1year after treatment. Potential risk factors included in multivariate analyses were HIV co-infection, involved margins, multicentric lesions, smoking, and use of hormonal contraception. The present study enrolled 307 participants. At 1year, 250 (81.4%) participants were free from lesions, 30 (9.8%) had low-grade squamous intraepithelial lesions, 26 (8.5%) had persistent HSILs, and 1 (0.3%) had developed invasive carcinoma. The risk of lesions persisting at 1year after LEEP was increased by HIV infection (P=0.003), involved margins (P=0.05), and smoking (P=0.02). The presence of multicentric lesions (P=0.73) and the use of hormonal contraception (P=0.99) did not increase the risk of lesion persistence. The risk of HSIL persistence was increased by the presence of involved margins (relative risk 3.25; 95% confidence interval 1.55-6.80; P=0.001). The presence of involved margins was the only variable that increased the risk of HSIL persistence after LEEP, increasing the risk of patients requiring further treatment. Copyright © 2016. Published by Elsevier Ireland Ltd.

  1. Logistic regression analysis on risk factors of fetal growth retardation%运用 Logistic 回归分析探讨胎儿生长受限的高危因素

    Institute of Scientific and Technical Information of China (English)

    肖云山

    2014-01-01

    Objective:To study the correlated factors for fetal growth retardation ( FGR) and evaluate the association between variables and pregnancy outcomes .Methods:A case-control study was conducted in this hospital of Xiamen Maternity and Child Health Care Hospital based on the data of patients treated from 1.1.2011 to 12.31.2011.Chi-square test , independent-Sample t Test and multivariable unconditional Logistic regression analysis were used to evaluate the association between variables and pregnancy outcomes .Results:According to the analysis , the factors associated with FGR were as follows:age(P=0.047,OR=0.949,CI 0.901-0.999),anemia(P=0.008,OR=1.354, CI 0.164-0.766), hypamnios(P=0.034,OR=2.530,CI 1.074-5.964 )and placental abnormality (P=0.015,OR=2.337,CI 1.180-4.626).Conclusion:Anemia, hypamnios and placental abnormality are reasons correlatted with FGR.Active prevention targeting to the above-mentioned high risk factors can reduce the occurrence of FGR .%目的:探讨胎儿生长受限的影响因素及其与妊娠结局的关联性。方法:以厦门市妇幼保健院2011年1月1日至2011年12月31日的分娩临床资料作为样本进行病例对照研究,数据经χ2检验、独立样本t检验和多因素非条件Logistic回归进行分析。结果:胎儿生长受限的影响因素有:孕妇年龄( P=0.047,OR =0.949,CI 0.901~0.999)、贫血(P=0.008,OR =1.354,CI 0.164~0.766)、羊水过少(P =0.034,OR =2.530,CI 1.074~5.964)及胎盘异常(P=0.015,OR=2.337,CI 1.180~4.626)等。结论:贫血、胎盘异常、羊水过少是与胎儿生长受限有关的主要因素,针对相关因素积极干预有助于防治胎儿生长受限。

  2. Reproductive risk factors assessment for anaemia among pregnant women in India using a multinomial logistic regression model.

    Science.gov (United States)

    Perumal, Vanamail

    2014-07-01

    To assess reproductive risk factors for anaemia among pregnant women in urban and rural areas of India. The International Institute of Population Sciences, India, carried out third National Family Health Survey in 2005-2006 to estimate a key indicator from a sample of ever-married women in the reproductive age group 15-49 years. Data on various dimensions were collected using a structured questionnaire, and anaemia was measured using a portable HemoCue instrument. Anaemia prevalence among pregnant women was compared between rural and urban areas using chi-square test and odds ratio. Multinomial logistic regression analysis was used to determine risk factors. Anaemia prevalence was assessed among 3355 pregnant women from rural areas and 1962 pregnant women from urban areas. Moderate-to-severe anaemia in rural areas (32.4%) is significantly more common than in urban areas (27.3%) with an excess risk of 30%. Gestational age specific prevalence of anaemia significantly increases in rural areas after 6 months. Pregnancy duration is a significant risk factor in both urban and rural areas. In rural areas, increasing age at marriage and mass media exposure are significant protective factors of anaemia. However, more births in the last five years, alcohol consumption and smoking habits are significant risk factors. In rural areas, various reproductive factors and lifestyle characteristics constitute significant risk factors for moderate-to-severe anaemia. Therefore, intensive health education on reproductive practices and the impact of lifestyle characteristics are warranted to reduce anaemia prevalence. © 2014 John Wiley & Sons Ltd.

  3. 小儿腹股沟疝嵌顿因素的Logistic回归分析%Logistic regression analysis on factors affecting incarcerated pediatric inguinal hernia

    Institute of Scientific and Technical Information of China (English)

    苗春林; 王誉都

    2013-01-01

    目的 分析可能影响小儿腹股沟疝嵌顿的危险因素,筛选出相互独立的可能导致小儿腹股沟疝嵌顿的危险因素.方法 回顾性分析2006年1月至2012年4月采用腹腔镜治疗小儿腹股沟疝1368例的临床资料,采用Logistic回归分析可能影响小儿腹股沟疝嵌顿的危险因素.结果 单因素分析结果显示患儿年龄、是否早产、外环口内径、腹股沟管长度、内环口内径及内环口类型是小儿腹股沟疝嵌顿的主要危险因素(P均<0.05).Logistic回归分析结果显示,患儿年龄、腹股沟管长度及外环口内径是影响小儿腹股沟疝嵌顿的主要危险因素(P均<0.05).结论 小儿腹股沟疝嵌顿多发生在幼儿年龄阶段,外环口的内径和腹股沟管的长度是影响小儿腹股沟疝嵌顿的独立危险因素.%Objective To investigate the factors affecting incarcerated pediatric inguinal hernia.Methods Clinical data of 1368 cases of pediatric inguinal hernia treated with laparoscopy from January 2006 to April 2012 were analyzed retrospectively.Logistic regression analysis was applied to analyze the factors affecting incarcerated pediatric inguinal hernia.Results Univariate analysis showed that six factors were related to incarcerated pediatric inguinal hernia,including age,premature birth,inside diameter of superficial inguinal ring,inside diameter of deep inguinal ring,length of inguinal canal and type of deep inguinal ring (P<0.05).Multivariate analysis showed that age,length of inguinal canal and inside diameter of superficial inguinal ring were the independent risk factors affecting incarcerated pediatric inguinal hernia (P<0.05).Conclusions Patients' age,length of inguinal canal and inside diameter of superficial inguinal ring are the independent risk factors affecting incarcerated pediatric inguinal hernia.

  4. Computational Logistics

    DEFF Research Database (Denmark)

    Pacino, Dario; Voss, Stefan; Jensen, Rune Møller

    2013-01-01

    This book constitutes the refereed proceedings of the 4th International Conference on Computational Logistics, ICCL 2013, held in Copenhagen, Denmark, in September 2013. The 19 papers presented in this volume were carefully reviewed and selected for inclusion in the book. They are organized...... in topical sections named: maritime shipping, road transport, vehicle routing problems, aviation applications, and logistics and supply chain management....

  5. Computational Logistics

    DEFF Research Database (Denmark)

    This book constitutes the refereed proceedings of the 4th International Conference on Computational Logistics, ICCL 2013, held in Copenhagen, Denmark, in September 2013. The 19 papers presented in this volume were carefully reviewed and selected for inclusion in the book. They are organized...... in topical sections named: maritime shipping, road transport, vehicle routing problems, aviation applications, and logistics and supply chain management....

  6. Identifying Environmental and Social Factors Predisposing to Pathological Gambling Combining Standard Logistic Regression and Logic Learning Machine.

    Science.gov (United States)

    Parodi, Stefano; Dosi, Corrado; Zambon, Antonella; Ferrari, Enrico; Muselli, Marco

    2017-03-02

    Identifying potential risk factors for problem gambling (PG) is of primary importance for planning preventive and therapeutic interventions. We illustrate a new approach based on the combination of standard logistic regression and an innovative method of supervised data mining (Logic Learning Machine or LLM). Data were taken from a pilot cross-sectional study to identify subjects with PG behaviour, assessed by two internationally validated scales (SOGS and Lie/Bet). Information was obtained from 251 gamblers recruited in six betting establishments. Data on socio-demographic characteristics, lifestyle and cognitive-related factors, and type, place and frequency of preferred gambling were obtained by a self-administered questionnaire. The following variables associated with PG were identified: instant gratification games, alcohol abuse, cognitive distortion, illegal behaviours and having started gambling with a relative or a friend. Furthermore, the combination of LLM and LR indicated the presence of two different types of PG, namely: (a) daily gamblers, more prone to illegal behaviour, with poor money management skills and who started gambling at an early age, and (b) non-daily gamblers, characterised by superstitious beliefs and a higher preference for immediate reward games. Finally, instant gratification games were strongly associated with the number of games usually played. Studies on gamblers habitually frequently betting shops are rare. The finding of different types of PG by habitual gamblers deserves further analysis in larger studies. Advanced data mining algorithms, like LLM, are powerful tools and potentially useful in identifying risk factors for PG.

  7. Factors associated with family-centered involvement in family practice--a cross-sectional multivariate analysis.

    Science.gov (United States)

    Deutsch, Tobias; Frese, Thomas; Sandholzer, Hagen

    2014-01-01

    The importance of a family-centered approach in family practice has been emphasized. Knowledge about factors associated with higher family-centered involvement seems beneficial to stimulate its realization. German office-based family physicians completed a questionnaire addressing several aspects of family-centered care. Logistic regression was used to identify associations with the involvement overall and in different domains: routine inquiry and documentation of family-related information, family orientation regarding diagnosis and treatment, family-oriented dialogues, family conferences, and case-related collaboration with marriage and family therapists. We found significant associations between physicians' family-centered involvement and expected patient receptiveness, perceived impact of the family's influence on health, self-perceived psychosocial family-care competences (overall and concerning concepts for family orientation, psychosocial intervention in family conferences, and the communication of the idea of family counseling), advanced training in psychosocial primary care (PPC), personal acquaintance with family therapists (regarding case-related collaboration), and rural office environment. Increased emphasis on the family's influence on health in medical education and training, the provision of concepts for a family-centered perspective, and versatile skills for psychosocial intervention and inquiry of patient preferences, as well as the strengthening of networking between family physicians and family therapists, might promote the family-centered approach in family practice.

  8. Logistic regression analysis of the outcome on 90 d and associated factors in conscious patients with intracerebral hemorrhage

    Directory of Open Access Journals (Sweden)

    ZHEN Zhi-gang

    2013-09-01

    Full Text Available Objective To investigate the outcome on 90 d and influencing factors for the outcome in conscious patients with intracerebral hemorrhage (ICH. Methods Two hundred and twenty-five patients with ICH were admitted to our hospital within 6 h after onset and were suitable to be treated with medical conservative therapy. Patients were divided into two groups, the conscious group [Glasgow Coma Scale (GCS score ≥ 9] and the coma group (GCS score ≤ 8. Clinical features including gender, age, National Institute of Health Stroke Scale (NIHSS score, etc, were recorded. The prognosis of these patients on 90 d after onset was evaluated by the following index: survival or death; favorable prognosis [modified Rankin Scale (mRS score ≤ 2] or unfavorable prognosis (mRS score ≥ 3, death or severe disability. The difference of clinical features and prognosis between the conscious group and coma group was explored. The prognosis of the patients in conscious group was analyzed, and influencing factors for prognosis were explored. Results Multifactorial Logistic regression analysis indicated that hyperglycemia, higher NIHSS score, rehemorrhagia and hematemesis were independent risk factors for 90-day mortality. On the other hand, advanced age, higher NIHSS score, rehemorrhagia and hematemesis were independent risk factors for death or severe disability on 90-day. Conclusion In ICH patients who were conscious on admission, hyperglycemia, advanced age, higher NIHSS score, rehemorrhagia and hematemesis are strong predictors for mortality and unfavourable outcome. Controlling hyperglycemia and prevention of rehemorrhagia and hematemesis are important elements for reducing 90-day mortality and severe disability.

  9. A logistics sector’s perspective of factors and risks within the business environment that influence supply chains’ effectiveness: An explorative mixed method study

    Directory of Open Access Journals (Sweden)

    Johanna A. Badenhorst-Weiss

    2015-02-01

    Full Text Available Background: Supply chains in South Africa operate in a challenging business environment. This environment influences the efficiency and effectiveness of South African businesses and supply chains. These factors further influence the competitiveness of products produced in the country, the economic growth and development of South Africa.Objectives: The purpose of this study was two-fold: Firstly, to obtain insight into the main business environment risks and other factors, from a logistics perspective; and secondly, to demonstrate the use of methodology not often used in logistics research − the sequential mixed method.Method: The explorative study was conducted amongst logistics service providers and cargo owners in 2013 by means of a sequential mixed method study, consisting of a survey to determine the importance of risk factors in the business environment, followed by a qualitative study in the form of a focus group discussion to obtain richer data and insight into these risks and factors. The results of these two methods were integrated with industry literature.Results: It was found that increasing transportation costs, operational management of infrastructure and human resources-related problems pose the biggest challenges in the logistics industry. In addition, it was found that the mixed method research study has application possibilities in logistics research.Conclusion: The factors identified as particularly problematic for the logistics industry, namely ineffective operational management of infrastructure, the general conditions in the labour market and increasing costs (to some extent are outside the control of individual organisations. However, organisations can control how they react and mitigate these risk factors. It is shown that these factors and risks can change overnight. The use of the explorative mixed method in obtaining qualitative and quantitative inputs and integrating it with existing literature proved to be a

  10. Logistical Worlds

    Directory of Open Access Journals (Sweden)

    Ned Rossiter

    2014-03-01

    Full Text Available As the managerial art and science of coordinating the movement of people, finance and things, logistical operations are central to contemporary capital. Despite its materiality in the form of communications and transport infrastructure, logistics remains an abstract machine for many. This is largely due to the compartmental structure of global supply chains and the invisibility of code. In registering the mediating force of logistics, the essay considers parametric politics as an architecture of intervention for both game design and software development. There are implications here not only for gameplay, but also the invention of method and governance of labour. How, for instance, might game design facilitate the production of a political knowledge of logistics? This becomes a matter to address for labour power vis-à-vis collective research on infrastructure, software and global supply chains.

  11. LOGISTICS - EVOLUTION THROUGH INNOVATION

    Directory of Open Access Journals (Sweden)

    Petrache Alexandru Constantin

    2015-07-01

    Full Text Available The current economic conditions, the rapidity with which the exchange of information, resources and products in the market takes place makes the logistics seem appreciably less significant. However, the importance of logistics has been presented in the military field, through strategies that have led to wining of the great wars that mankind has seen, through the supply of troops with food or moving military equipment. The literature in the field of logistics has numerous works on this topic. But while most focuses on efficient ways of carrying out the component activities of logistics or the strategies of organizations with regard to logistics or its functions, research on dynamics of logistics is underdeveloped. To be able to propose new methods or strategies of logistic activities is necessary to understand the development of this concept, determinant factors and economic and social conditions that gave rise to such developments. Thus, after a presentation of the main landmarks of the historical development of logistics we highlight the importance of the innovation within an organization's value chain innovation, in particular, and how to conduct the business in general. Using generations of innovation identified in the literature, we determine the generation of logistics development, taking into account innovation and how to conduct business. In addition for a better highlight of the own vision over the logistics generations identified, we will present the graphical concept for each generation in part. Last but not least, for each generation identified we try to allocate the chronological landmarks featured in order to reinforce the importance played by innovation in the development of the logistics industry and to give future directions of research within this topic. The study took into account the information presented in articles, books and websites of the relevant specialty in logistics and innovation to be able to build and expose a

  12. Personality, Driving Behavior and Mental Disorders Factors as Predictors of Road Traffic Accidents Based on Logistic Regression

    Directory of Open Access Journals (Sweden)

    Seyyed Salman Alavi

    2017-01-01

    Full Text Available Background: The aim of this study was to evaluate the effect of variables such as personality traits, driving behavior and mental illness on road traffic accidents among the drivers with accidents and those without road crash. Methods: In this cohort study, 800 bus and truck drivers were recruited. Participants were selected among drivers who referred to Imam Sajjad Hospital (Tehran, Iran during 2013-2015. The Manchester driving behavior questionnaire (MDBQ, big five personality test (NEO personality inventory and semi-structured interview (SADS were used. After two years, we surveyed all accidents due to human factors that involved the recruited drivers. The data were analyzed using the SPSS software by performing the descriptive statistics, t-test, and multiple logistic regression analysis methods. P values less than 0.05 were considered statistically significant. Results: In terms of controlling the effective and demographic variables, the findings revealed significant differences between the two groups of drivers that were and were not involved in road accidents. In addition, it was found that depression and anxiety could increase the odds ratio (OR of road accidents by 2.4- and 2.7-folds, respectively (P=0.04, P=0.004. It is noteworthy to mention that neuroticism alone can increase the odds of road accidents by 1.1-fold (P=0.009, but other personality factors did not have a significant effect on the equation. Conclusion: The results revealed that some mental disorders affect the incidence of road collisions. Considering the importance and sensitivity of driving behavior, it is necessary to evaluate multiple psychological factors influencing drivers before and after receiving or renewing their driver’s license.

  13. Investigation of Barriers and Factors Affecting the Reverse Logistics of Waste Management Practice: A Case Study in Thailand

    Directory of Open Access Journals (Sweden)

    Sumalee Pumpinyo

    2014-10-01

    Full Text Available Economic growth in developing countries accelerated waste generation, and Thailand also is experiencing issues related to increased waste generation and improper waste management. The country’s domestic waste utilization is only 20%–26%. Efficient waste management and increased quantity of waste utilization is possible only by overcoming problems and constraints in reverse logistics (RL systems in Thailand. To address these issues and constraints, this study aims to focus the investigation on the current practices in the RL systems. The study was conducted in Bangkok and its vicinity. An integrated approach of qualitative and quantitative methods was employed to investigate the systems’ and stakeholders’ characteristics and to explore the factors influencing and constraining RL practices. Data were gathered through: (1 existing literature and in-depth interviews of key stakeholders involved in RL; and (2 a questionnaire survey of 98 managers of separation centers (SCs probing their practices and studying the factors influencing those practices. The findings showed that RL systems can be separated into three levels, i.e., downstream, middle stream and upstream. SCs are key stakeholders in RL of waste management, and they collect waste from downstream, manage waste in a systematic way and send it upstream. The factors influencing and the barriers in the flow of recyclable waste are related to environmental, economic and social aspects. The analysis shows that waste managed by a cooperative-like franchise of SCs perceived that their practices were more efficient than those of a non-franchise practices. Additionally, these SCs have more bargaining power with waste buyers and sellers to set prices in the RL system. The constraints in RL practice are related to finance, market, labor, management/technology and legal issues.

  14. Personality, Driving Behavior and Mental Disorders Factors as Predictors of Road Traffic Accidents Based on Logistic Regression

    Science.gov (United States)

    Alavi, Seyyed Salman; Mohammadi, Mohammad Reza; Souri, Hamid; Mohammadi Kalhori, Soroush; Jannatifard, Fereshteh; Sepahbodi, Ghazal

    2017-01-01

    Background: The aim of this study was to evaluate the effect of variables such as personality traits, driving behavior and mental illness on road traffic accidents among the drivers with accidents and those without road crash. Methods: In this cohort study, 800 bus and truck drivers were recruited. Participants were selected among drivers who referred to Imam Sajjad Hospital (Tehran, Iran) during 2013-2015. The Manchester driving behavior questionnaire (MDBQ), big five personality test (NEO personality inventory) and semi-structured interview (schizophrenia and affective disorders scale) were used. After two years, we surveyed all accidents due to human factors that involved the recruited drivers. The data were analyzed using the SPSS software by performing the descriptive statistics, t-test, and multiple logistic regression analysis methods. P values less than 0.05 were considered statistically significant. Results: In terms of controlling the effective and demographic variables, the findings revealed significant differences between the two groups of drivers that were and were not involved in road accidents. In addition, it was found that depression and anxiety could increase the odds ratio (OR) of road accidents by 2.4- and 2.7-folds, respectively (P=0.04, P=0.004). It is noteworthy to mention that neuroticism alone can increase the odds of road accidents by 1.1-fold (P=0.009), but other personality factors did not have a significant effect on the equation. Conclusion: The results revealed that some mental disorders affect the incidence of road collisions. Considering the importance and sensitivity of driving behavior, it is necessary to evaluate multiple psychological factors influencing drivers before and after receiving or renewing their driver’s license. PMID:28293047

  15. Determination of Natural and Anthropogenic Factors on Pollution of Heavy Metals in the Central Zanjan (Based on Multivariate Analysis

    Directory of Open Access Journals (Sweden)

    A. Afshari

    2017-01-01

    the main anthropogenic source of heavy metals pollution in the soil samples near theintense transportation traffic roads, accumulation site of factories solidwaters, energy generation process, metal melting, construction and traffic breaking out in whole area. Our results are in line with enormous findings on farming operations as the main factor that cause changes in Cd concentration in soils. although Pb, Cu, Zn and Cd have been shown to have anthropogenic origin inputs, however in respect to PCA analysis, the main origins for Lead and Zn may be municipal and industrial operations specially Pb processing factory as well as industrial complexes. At the same time, Cu and Cd stems from farming operations as well as municipal activities. The main municipal input origins for elements Pb, Cu and Cd include all components used in automobile industry, batteries, engines oils, fossil fuels and construction materials (like cement. Cluster analysis is used to classifying those samples having common and similar characteristics as well as evaluating information obtained from PCA analysis. Cluster analysis gave the same groups. So two majororigins can be identified. First (CI involves prior interpreted lithogenic elements (Cr, Co, Mn and Fe, while two later clusters (C2, C3 contain anthropogenic elements (Pb, Cu, Zn and Cd. Many researchers believed that Mn, Cr, Ni and Fe are controlled by parent material. In contrast, they attributed any increases of Pb, Cu, Cd and Zn accumulation to anthropogenical operations. Cluster analysis gives the same results as derived from PCA, enabling us to identify two major origins on which heavy metals break out hence, multivariate analysis results confirms the presence of two different heavy metals origins within soils. Conclusion: The aim of this research was to provide some preliminary information on heavy metals (Pb,Zn,Cd,Cu,Ni,Co,Cr,FeandMn contamination status in soils in Zanjan province. Metal contamination cannot be assessed by common

  16. Correlating phospholipid fatty acids (PLFA) in a landfill leachate polluted aquifer with biogeochemical factors by multivariate statistical methods

    DEFF Research Database (Denmark)

    Ludvigsen, Liselotte; Albrechtsen, Hans-Jørgen; Rootzén, Helle

    1997-01-01

    Different multivariate statistical analyses were applied to phospholipid fatty acids representing the biomass composition and to different biogeochemical parameters measured in 37 samples from a landfill contaminated aquifer at Grindsted Landfill (Denmark). Principal component analysis and corres......Different multivariate statistical analyses were applied to phospholipid fatty acids representing the biomass composition and to different biogeochemical parameters measured in 37 samples from a landfill contaminated aquifer at Grindsted Landfill (Denmark). Principal component analysis....... Partial least square analysis related the phospholipid fatty acids data to the biogeochemical parameters assuming linear relationships. After selection of the optimal phospholipid fatty acid combination by genetic algorithms, good partial least squares models with low prediction errors were gained...

  17. 车队绿色物流实践及其促进因素探讨%Discussion on Promotional Factors for Green Logistics Practice of Vehicle Fleets

    Institute of Scientific and Technical Information of China (English)

    高平; 范爱玲; 高峰; 杨艳慧

    2015-01-01

    In this paper, we introduced the general situation of the researches on green logistics, pointed out how the researches significantly influenced the logistics transportation practices in China. From the perspective of the institutional economics, we described the relationship between the promotional factors of the green logistics practice of vehicle fleets and proposed the relevant hypothesis. Next through a questionnaire survey on some logistics transportation businesses, we summarized that the major promotional factors studied here mainly included local and administrative policies and regulations, etc., and then upgraded 36 different solutions of the green logistics practice of vehicle fleets.%介绍了绿色物流相关研究概况,指出其对国内物流运输造成了显著的影响.从制度经济学角度出发,描述了车队绿色物流实践促进因素间的关系,并提出相关假设.对物流运输业进行了相关的问卷调查,总结出车队绿色物流主要促进因素包括地方和行政政策法规等,并对36种不同的车队绿色物流实践方案进行了分级.

  18. Slowness logistics

    OpenAIRE

    Paché, Gilles

    2007-01-01

    Abstract Works conducted in logistics management mostly emphasize the importance of a `time compression' strategy to develop a sustainable competitive advantage. At the level of the design, manufacturing or distribution of products to consumers, high-speed orientation is now considered to be a universal source of performance. Drawing from current developments in the French food retailing industry, the paper...

  19. MULTIVARIATE LOGISTIC REGRESSION ANALYSIS ON RISK FACTORS OF PRESCHOOL CHILDREN OBESITY%学龄前儿童肥胖危险因素Logistic模型分析

    Institute of Scientific and Technical Information of China (English)

    芮溧; 曾果

    2008-01-01

    [目的]分析影响成都市学龄前儿童肥胖的危险因素,为儿童肥胖的预防和控制提供基础资料.[方法]在成都市城区6所幼儿园随机选取50名学龄前肥胖儿童,按1:2的比例与100名同性别、同身高、同年龄的正常儿童配对,通过问卷调查儿童肥胖的影响因素,并采用条件logistic回归模型分析.[结果]多因素条件logistic回归模型分析显示,食量大是学龄前儿童肥胖的第一危险因素(OR=96.93),摄入能量越多发生儿童肥胖的危险性越高;出生巨大儿是学龄前儿童肥胖的第二危险因素(OR=23.77);控制儿童出生体重和能量摄入团素后,父亲肥胖是儿童肥胖的危险因素(OR=5.72).[结论]学龄前儿童肥胖的危险因素多与生活行为方武相关,应采取综合营养干预以预防和控制儿童肥胖.

  20. Composition of Grain Logistics Capacity and Its Influence Factors%粮食物流能力的构成及影响因素研究

    Institute of Scientific and Technical Information of China (English)

    洪运华

    2012-01-01

    Grain logistics capacity is an integral ingredient of the core competence of the grain industrial chains or enterprises. It is an important means to realize competitive advantage and can reflect the overall performance of the grain logistics system. This paper defines the connotation of grain logistics capacity, introduces its composition and analyzes its major influence factors.%粮食物流能力是粮食产业链或粮食企业核心能力的重要组成,是实现竞争优势的重要手段,是粮食物流系统整体能力的综合反映.界定了粮食物流能力的内涵,介绍了粮食物流能力的构成,分析了粮食物流能力的影响因素.

  1. Factores de riesgo para osteoporosis y fracturas de cadera: Análisis multivariado Association between hip fractures and risk factors for osteoporosis: Multivariate analysis

    Directory of Open Access Journals (Sweden)

    Ana Masoni

    2007-10-01

    Full Text Available En este trabajo se analizó la asociación entre factores de riesgo (FR y fracturas de cadera, se evaluó la influencia de FR relacionados con baja masa ósea o con traumatismos, y se exploró la existencia de factores protectores (FP. Se estudiaron datos de 376 pacientes hospitalizados, de los cuales 151 presentaban fracturas de cadera osteoporóticas (casos; el resto fueron controles, a partir de historias clínicas y un cuestionario sobre FR para osteoporosis. La edad promedio fue 80.6 ± 8.1 años, similar en casos y controles; la relación mujer/varón fue de 3:1 en ambos grupos. Las mujeres fracturadas eran mayores que los varones fracturados (82.5 ± 8.1 versus 79.7 ± 7.2 años; p In this observational, case-control study, 376 inpatients were evaluated in order to determine the association of risk factors (RF and hip fracture; 151 patients had osteoporotic hip fracture (cases; the remaining were controls. Data were obtained from medical charts, and through a standardized questionnaire about RF. Mean age of the sample (± SD was 80.6 ± 8.1 years, without statistically significant difference between cases and controls; the female:male ratio was 3:1 in both groups. Fractured women were older than men (82.5 ± 8.1 vs. 79.7 ± 7.2 years, respectively; p < 0.01. Physical activity, intake of alcohol and tobacco, and sun exposure were low in all patients. Falls among cases happened predominantly at home (p < 0.001. Among female cases, time spent in household duties was a RF (p = 0.007, which was absent in males. In multivariate analysis, the following RF were significantly more frequent: Cognitive impairment (p = 0.001, and previous falls (p < 0.0001; whereas the following protective factors were significantly different from controls: Calcium intake during youth (p < 0.0001, current calcium intake (p < 0.0001, and mechanical aid for walking (p < 0.0001. Evaluation of RF and protective factors may contribute to diminish the probability of hip

  2. Risk factors related to cancer by Logistic regressive analysis%恶性肿瘤危险因素的Logistic回归分析

    Institute of Scientific and Technical Information of China (English)

    邱惠; 张艳; 雷海科; 冯长艳; 何美; 周琦

    2012-01-01

    目的:了解恶性肿瘤的患病现况,探讨恶性肿瘤发病的危险因素,为制定恶性肿瘤的预防策略提供科学依据.方法:将确诊为恶性肿瘤患者的30人作为病例组,采用随机抽样的方法从4 290份正常人群的资料中抽取出430人作为对照组.采用统计软件SPSS17.0对460人的资料,先进行单因素分析,然后采用多因素非条件Logistic回归模型筛选主要危险因素.结果:恶性肿瘤的患病率为0.69%,单因素分析显示年龄、年均收入、体重指数、文化程度、肿瘤家族史、水果蔬菜的饮食量、含油和脂肪多的食物频率、吸烟、饮酒及活动时间与肿瘤的发生有一定的关联,多因素显示年龄、体重指数、肿瘤家族史、水果蔬菜的饮食量、含油和脂肪多的食物、吸烟及活动时间是恶性肿瘤的危险因素.结论:肿瘤与生活方式有关,改变不良生活方式可以在一定程度上降低患肿瘤的风险.%Objective:To investigate the prevalence of cancer,assess the risk factors of cancer and offer the bases for making inter-ventional measures. Methods:30 cancer patients were taken as case group,and with the method of random sampling from the crowd of 4 290 normal data,430 people were extracted as control group. First, Chi-square and t-test were used to discuss the relationship between the various factors,and then Logistic regression analysis was made by statistics software SPSS17.0 based on the results of the 460 people. Results:The prevalence of cancer was 0.69%. Single factor analysis results showed cancer was relate to age,average annual income,BMI,educational level,family history of cancer,frequency of fruit and vegetable diet,oily and fatty food,smoking,drinking and activity time. Multivariate analysis showed that age,BMI,family history of cancer,frequency of fruit and vegetable diet,oily and fatty food,smoking and activity time were independent risk factors of cancer. Conclusion:Cancer is a kind of

  3. 门诊患者宫颈癌现患率及危险因素Logistic回归分析%Logistic regression analysis on prevalence rate of cervical cancer and risk factors in outpatient

    Institute of Scientific and Technical Information of China (English)

    文彩虹; 冯晓庆; 罗荣城

    2013-01-01

    Objective: To explore the prevalence rate of cervical cancer and analyze the related risk factors. Methods: The related data of 65 patients diagnosed as cervical cancer definitely and 114 healthy women without cervical intraepithelial neoplasia (CIN) definitely were analyzed retrospectively, questionnaire investigation and related examination were performed, than univariate non - conditional logistic regression analysis and multivariate non - conditional logistic regression analysis were used to analyze the indexesnon - conditional logistic regression analysis. Results: The prevalence rate of cervical cancer was 240/100 000. Univariate logistic regression analysis showed that the related factors of cervical cancer were human papillomavirus ( HPV) infection ( P two years (P 3 , and contraception with condom; multivariate non -conditional logistic regression analysis showed that the main risk factors of occurrence of cervical cancer were HPV infection (P<0.01) and serum selenium content<1.06 μg/ml (P<0.01) . Conclusion: The prevalence rate of cervical cancer is at a high level; HPV infection and low serum selenium content are correlated with the occurrence of cervical cancer, so preventing HPV infection and supplying selenium can paly active roles in controlling female cervical cancer.%目的:探讨宫颈癌的现患率并分析其相关危险因素.方法:回顾分析确诊为宫颈癌的患者65例和随机选取的114例确诊未发生宫颈鳞状上皮内瘤变的健康妇女的相关资料,并对其进行问卷调查及相关检查,对各指标行单因素和多因素非条件Logistic回归分析.结果:宫颈癌现患率为240/10万.单因素分析发现,与宫颈癌发生有关的是人乳头瘤病毒(HPV)感染(P<0.01)、血清硒(Se)含量<1.06μg/ml (P<0.01),患宫颈炎年限>2年(P<0.01)、性伴侣>3个(P<0.05)、避孕套防护(P<0.01),多因素非条件Logistic分析发现宫颈癌发病主要危险因素依次是HPV感染(P<0.01)

  4. An empirical investigation on the effects of organizational and individual factors creating conflicts on employee performance: A case study of logistics management of national Iranian drilling company

    Directory of Open Access Journals (Sweden)

    Naser Deris Soltanpour

    2014-01-01

    Full Text Available This paper presents a survey on the effects of organizational and individual factors causing conflict on employee performance of national Iranian drilling company's logistics management. It has been of descriptive type and carried out by using the random sampling method. The statistical population included all the employees of logistics management. Invariable t-test was used in this research for data analysis. The results showed that the average factors such as education, age, personal ethics, scarcity of resources, work dependence, organizational structure and organizational culture were significantly higher than the average value (3 and the average factors such as personality, evaluation structure and reward were significantly lower than the average value (3. According to the results of this survey, feeling dependence was number one priority for creating conflict followed by personal ethics, education, resources, organizational culture, age, organizational structure, evaluation and individual personality was the last item.

  5. Logistic regression analysis of risk factors of Type 2 diabetes mellitus complicated with cardiovascular disease factors%2型糖尿病并发心血管疾病危险因素Logistic 回归分析

    Institute of Scientific and Technical Information of China (English)

    刘明哲

    2015-01-01

    Objective To explore the main risk factors of type 2 diabetes mellitus(T2DM)complicated with cardiovascular disease(CVD).Methods The T2DMof 128 cases of CVD associated with CVD group were selected, the patients with T2DM 107 cases were selected as control group,used Logistic regression method for the analysis of the risk factors of concurrent CVD.Results The risk of CVD in patients with a family history of T2DM was 1.535 times of that of the other patients (OR =1.535,95%CI =1.145,2.057,P =0.036),the vegetarian diet patients was 41.3% (OR =0.413,95%CI =0.210,0.815,P =0.024),in patients with hypertension was 2.077 times (OR =2.077,95%CI =1.301,2.813,P =0.010).T2DM patients with TG,PBG,LDL -C,HDL -C per 1mmol/L rise,the risk of concurrent CVD was 1.192 times of that of the other patients (OR =1.192,95%CI 1.012,1.372, P =0.023),1.125 times(OR =1.125,95%CI =1.043,1.218,P =0.028),1.712 times (OR =1.712,95%CI =1.203,2.231,P =0.009)and 42.6% (OR =0.426,95%CI =0.239,0.776,P =0.011);HbA1c increased every 1%,the risk of concurrent CVD was 1.284 times of that of theother patients (OR =1.284,95%CI =1.132,1.413, P =0.013);BMI increased by 1kg/m2 ,the risk of concurrent CVD was 1.508 times of that of the other patients (OR =1.508,95%CI =1.143,1.825,P =0.026);C2 increased by 1mL/mmHg ×100,the risk was the other patient's 33.9% (OR =1.508,95%CI =1.143,1.825,P =0.026).Conclusion Family history of T2DM,hypertension, TG,PBG,LDL -C,HbA1c and BMI are major risk factors for T2DMwith CVD;vegetarian diet,HDL -C and C2 are protective factors.%目的:探讨2型糖尿病(T2DM)并发心血管疾病(CVD)的主要危险因素。方法选择 T2DM合并 CVD 患者128例为 CVD 组,单纯 T2DM患者107例为对照组,采用 Logistic 回归方法对其并发 CVD 的危险因素进行分析。结果有 T2DM家族史、素食膳食或高血压患者并发 CVD 的危险为其他患者的1.535倍(OR =1.535,95%CI =1.145,2.057,P =0.036)、41.3%(OR =0

  6. 物流企业服务创新影响因素研究%Research of Logistics Service Innovation Factors

    Institute of Scientific and Technical Information of China (English)

    刘晓峰; 李传富

    2015-01-01

    物流行业是服务行业的一个重要组成部分,服务创新是提高物流企业竞争力的一个重要途径,同时对于服务经济的发展也有一定的促进作用。文中基于物流企业服务创新的内涵和服务创新驱动力模型,总结、归纳出影响物流企业服务创新的因素,并详细分析了这些影响因素。这有助于物流企业从理论角度更深刻理解影响服务创新的因素,进而有针对性的进行服务创新。%The logistics industry is an important part of the service industry, service innovation is an important way to improve the competitiveness of logistics enterprises, while the service economy also have some role in promoting.Base on the connotation of logistics business service innovation and service innovation driving force model,this paper summarize the factors that affect the logistics business service innovation,and analysis of these factors in detail.This helps logistics enterprises from the theoretical point of a deeper understanding of the factors affecting service innovation,and thus targeted for service innovation.

  7. Multivariate analysis of structure and contribution per shares made by potential risk factors at malignant neoplasms in trachea, bronchial tubes and lung

    Directory of Open Access Journals (Sweden)

    G.T. Aydinov

    2017-03-01

    Full Text Available The article gives the results of multivariate analysis of structure and contribution per shares made by potential risk factors at malignant neoplasms in trachea, bronchial tubes and lung. The authors used specialized databases comprising personified records on oncologic diseases in Taganrog, Rostov region, over 1986-2015 (30,684 registered cases of malignant neoplasms, including 3,480 cases of trachea cancer, bronchial tubes cancer, and lung cancer. When carrying out analytical research we applied both multivariate statistical techniques (factor analysis and hierarchical cluster correlation analysis and conventional techniques of epidemiologic analysis including etiologic fraction calculation (EF, as well as an original technique of assessing actual (epidemiologic risk. Average long-term morbidity with trachea, bronchial tubes and lung cancer over 2011-2015 amounts to 46.64 o / oooo . Over the last 15 years a stable decreasing trend has formed, annual average growth being – 1.22 %. This localization holds the 3rd rank place in oncologic morbidity structure, its specific weight being 10.02 %. We determined etiological fraction (EF for smoking as a priority risk factor causing trachea, bronchial tubes and lung cancer; this fraction amounts to 76.19 % for people aged 40 and older, and to 81.99 % for those aged 60 and older. Application of multivariate statistical techniques (factor analysis and cluster correlation analysis in this research enabled us to make factor structure more simple; namely, to highlight, interpret, give a quantitative estimate of self-descriptiveness and rank four group (latent potential risk factors causing lung cancer.

  8. Logistic regression analysis on inlfuencing factors of medical abortion outcome%药物流产结局影响因素的logistic回归分析

    Institute of Scientific and Technical Information of China (English)

    刘梅云; 张红杰; 朱继红; 高敬

    2014-01-01

    目的:探讨药物流产结局的影响因素,为制定相应的干预措施提供依据。方法以药物流产后因不全流产或失败行手术干预者为病例组,以药物流产后完全流产者为对照组,采用病例对照研究,分析影响药物流产结局的因素。采用SPSS16.0进行数据分析。结果共调查病例组32例,对照组170例。单因素分析结果表明,手术流产史(χ2=4.691, P=0.030)、药物流产的地点(χ2=13.487,P=0.000)、药物流产的孕周(χ2=6.747,P=0.009)、药物流产前是否诊断为阴道炎(χ2=22.153,P=0.000)对药物流产是否完全流产的影响有统计学意义;多因素logistic回归分析结果表明,药物流产的地点(OR=3.693,P=0.009)和药物流产前是否诊断为阴道炎(OR=4.520,P=0.000)是药物流产结局的独立影响因素。结论在私立诊所行药物流产妇女比选择公立医院或计划生育诊所,更可能发生流产不全或失败;患有阴道炎的妇女发生药物流产不全或失败的可能性更大。%Objective To explore the influencing factors of medical abortion outcome, and provide evidences for making intervention measures. Methods A case-control study was adopted with cases who had incomplete or failure abortion after medical abortion, and the controls were those who had complete abortion. The data was analyzed by SPSS16.0. Results The univariate analysis showed that factors such as the surgical abortion history (χ2=4.691, P=0.030), the site of the medical abortion (χ2=13.487, P=0.000), pregnant weeks (χ2=6.747, P=0.009), whether vaginitis before medical abortion (χ2=22.153, P=0.000) were influencing the medical abortion outcome. The multivariate analysis showed that risk factors were the site of the medical abortion (OR=3.693, P=0.009)and whether vaginitis before medical abortion (OR=4.520, P=0.000). Conclusion In private clinics, the ratio of incomplete abortion or failure of medical

  9. Affecting Factors of the Competitiveness of Logistics Industry in Eastern China%东部地区物流业竞争力影响要素研究

    Institute of Scientific and Technical Information of China (English)

    唐建荣; 汪肖肖

    2016-01-01

    This article constructs a fixed effects regression measuring model of logistics industry com-petitiveness based on the logistics data of 1 1 eastern provinces and cities from 2007 to 2013,taking in-to consideration the relationship between factor inputs and logistics industry competitiveness level.A number of factor inputs are analyzed,including scientific and technical personnel,fixed assets invest-ment,and industrial structure to figure out their impact on the logistics industry competitiveness,and the method of stepwise regression is employed to identify the significant factors.The result shows that the investment in fixed assets has a positive correlation with the logistics industry competitiveness, while scientific and technological personnel and the third industry development have a negative corre-lation with the logistics industry competitiveness.Therefore,this article argues that while the logis-tics infrastructure investment is being promoted,it is urgently needed that a new independent path of innovation be constructed by optimizing the industrial structure and building a solid foundation of in-novative human capital.%综合考虑要素投入与物流业竞争力水平之间的关系,根据2007~2013年我国东部11省市物流数据,构建物流业竞争力固定效应回归计量模型,分析要素投入包括科技人员、固定资产投资、产业结构对物流业竞争力的影响程度,运用逐步回归对其显著因素进行识别。结果表明,固定资产投资与物流业竞争力呈现正相关,科技人员和第三产业发展对物流业竞争力的提升呈现负相关。因此东部地区在积极投资物流基础设施的同时亟需走以创新型人力资本为主体,以产业结构优化为方向的自主创新道路。

  10. Multivariate methods and forecasting with IBM SPSS statistics

    CERN Document Server

    Aljandali, Abdulkader

    2017-01-01

    This is the second of a two-part guide to quantitative analysis using the IBM SPSS Statistics software package; this volume focuses on multivariate statistical methods and advanced forecasting techniques. More often than not, regression models involve more than one independent variable. For example, forecasting methods are commonly applied to aggregates such as inflation rates, unemployment, exchange rates, etc., that have complex relationships with determining variables. This book introduces multivariate regression models and provides examples to help understand theory underpinning the model. The book presents the fundamentals of multivariate regression and then moves on to examine several related techniques that have application in business-orientated fields such as logistic and multinomial regression. Forecasting tools such as the Box-Jenkins approach to time series modeling are introduced, as well as exponential smoothing and naïve techniques. This part also covers hot topics such as Factor Analysis, Dis...

  11. Multivariate Analysis of Prognostic Factors Among 2,313 Patients With Stage III Melanoma: Comparison of Nodal Micrometastases Versus Macrometastases

    Science.gov (United States)

    Balch, Charles M.; Gershenwald, Jeffrey E.; Soong, Seng-jaw; Thompson, John F.; Ding, Shouluan; Byrd, David R.; Cascinelli, Natale; Cochran, Alistair J.; Coit, Daniel G.; Eggermont, Alexander M.; Johnson, Timothy; Kirkwood, John M.; Leong, Stanley P.; McMasters, Kelly M.; Mihm, Martin C.; Morton, Donald L.; Ross, Merrick I.; Sondak, Vernon K.

    2010-01-01

    Purpose To determine the survival rates and independent predictors of survival using a contemporary international cohort of patients with stage III melanoma. Patients and Methods Complete clinicopathologic and follow-up data were available for 2,313 patients with stage III disease in an updated and expanded American Joint Committee on Cancer (AJCC) melanoma staging database. Kaplan-Meier and Cox multivariate survival analyses were performed. Results Among all 2,313 patients with stage III disease, 81% had micrometastases, and 19% had clinically detectable macrometastases. The 5-year overall survival was 63%; it was 67% for patients with nodal micrometastases, and it was 43% for those with nodal macrometastases (P Multivariate analysis demonstrated that in patients with nodal micrometastases, number of tumor-containing lymph nodes, primary tumor thickness, patient age, ulceration, and anatomic site of the primary independently predicted survival (all P < .01). When added to the model, primary tumor mitotic rate was the second-most powerful predictor of survival after the number of tumor-containing nodes. In contrast, for patients with nodal macrometastases, the number of tumor-containing nodes, primary ulceration, and patient age independently predicted survival (P < .01). Conclusion In this multi-institutional analysis, we demonstrated remarkable heterogeneity of prognosis among patients with stage III melanoma, especially among those with nodal micrometastases. These results should be incorporated into the design and interpretation of future clinical trials involving patients with stage III melanoma. PMID:20368546

  12. The Influential Factors of Military Logistics Outsourcing%军事物流外包的影响因素研究

    Institute of Scientific and Technical Information of China (English)

    王斌达; 斯剑栋; 卢东进; 伍蓓

    2012-01-01

    军事物流外包是现代军事物流发展过程中的新模式。本文以浙江边防总队后勤基地为例,探讨了军事物流外包的三大影响因素:外包供应商服务水平,经济因素和环境因素。通过360份问卷的调查和统计分析,发现环境因素对军事物流外包影响最大,外包供应商服务水平影响次之,经济因素影响最小,从而为降低外包风险、实施和管理军事物流外包提供参考依据。%Military logistics outsourcing is a new pattern that derives from the contemporary military logistics.Having probed into the Frontier Corps Logistics Base of Zhejiang,this article digs out the three major influential factors of the outsourcing service of military logistics: environment,economy and suppliers' service quality.According to the statistics collected from 360 questionnaires,it indicates that among all the three influential elements,environmental factors affect military logistics outsourcing to the greatest extent,while suppliers' service quality ranks the second and economy of the minimal impact.Therefore,it is not exaggerating to say this survey provides essential reference for the refinement of military logistics outsourcing.

  13. Logistics potentials in business competitive advantage creation

    OpenAIRE

    Rafał Matwiejczuk

    2013-01-01

    Background: Companies constantly search for ways to achieve and sustain long-term competitive advantage. Among the factors influencing the competitive advantage creation there are so called logistics potentials, which constitute a component part of a business strategic potentials. Logistics resources, logistics capabilities and logistics competences are the main components of the logistics potentials structure and hierarchy. Methods: In order to recognize the logistics potentials which de...

  14. A Conditional Logistic Regression Analysis on Risk Factors of Ankylosing Spondylitis%强直性脊柱炎危险因素的条件 Logistic 回归分析

    Institute of Scientific and Technical Information of China (English)

    李俊杰; 季加芬; 董永珍; 杨恺; 贾南; 刘长云

    2013-01-01

    Objective To screen out the risk factors of ankylosing spondylitis with logistic regression analy-sis,and to evaluate the importance of risk factors to lead to AS ,also to probe into the protecting factors of AS to provide the data for evidence of the primary prevention for AS .Methods Determine the number of samples of the case group and the control group according to the incidence of AS ,to 1∶2 case-control study.Take the form of survey questionnaires to survey,then data analysis with logistic regression analysis .Results Test the various factors by chi-square,Gender, birth season, result of HLA-B27, rheumatoid arthritis history, occupation category,smoking, drinking,history of new homes relocation and sports exercise are statistically significant for the incidence of AS ,then make the Logistic regression analysis:gender,season of birth,HLA-B27,smoking are the risk factors of AS.Conclusion The incidence of ankylosing spondylitis is influenced by the genetic and environmental .Gender,season of birth,HLA-B27,smoking are the main risk factors for AS,The risk factors role can be avoided to reduce the incidence of AS for the purpose of eugenics .%  目的应用条件Logistic回归方法筛选出与强直性脊柱炎(AS)发病有关的主要危险因素,评估各主要危险因素对AS发病的相对重要性,为优生咨询提供数据并为实现AS的一级预防提供科学依据。方法根据目前流行病学资料提供的发病率确定病例组及对照组的样本数,按1∶2分组进行病例对照研究,采取调查问卷形式对患者经行调查,运用Logistic回归对数据进行统计学分析。结果通过卡方检验对各因素进行筛选,有性别、出生季节、HLA-B27检查结果、类风湿性关节炎病史、职业类型、吸烟、饮酒、新居搬迁史、体育锻炼情况等9因素与AS的发病具有统计学意义,将上述9因素进行Logistic回归分析,最后进入回归模型的危险因素为患者

  15. An Evaluation of the Implied Shortage Factor and Its Effect on the Air Force Logistics Command’s Economic Order Quantity (EOQ) Variable Safety Level.

    Science.gov (United States)

    Order Quantity (EOQ) model and a derivation of the Presutti and Trepp Model IV to establish inventory variable safety levels. The safety level (SL...implied shortage factor, lambda is an arbitrary value that has a major effect on the SL formula and inventory levels at each wholesale supply depot, the...Air Logistics Center. The objective of this thesis was to determine the effectiveness of the process by which lambda has been previously determined at

  16. Underground logistics

    CERN Document Server

    Foraz, K; CERN. Geneva. TS Department

    2005-01-01

    More than 80’000 tons of materials have to be transported and installed down into the LHC tunnel. The magnet assemblies which represent about 50’000 tons, will be transported according to the master schedule between March 2005 and November 2006. Considering that these about 1’800 cryo-magnets will be transported at a maximum speed of 3 km/h in a narrow tube (where installation works and hardware commissioning activities are ongoing) this duration of 21 months is a real challenge. This paper aims at describing: - the information flows between the different people involved in the logistics attached to the cryo-magnets, - the organization chosen within the Installation Coordination group, - the problems encountered so far and the solutions adopted. The coordination process with other underground transport and activities, mainly for the QRL will also be presented.

  17. Chemometric processing of second-order liquid chromatographic data with UV-vis and fluorescence detection. A comparison of multivariate curve resolution and parallel factor analysis 2.

    Science.gov (United States)

    Bortolato, Santiago A; Olivieri, Alejandro C

    2014-09-01

    Second-order liquid chromatographic data with multivariate spectral (UV-vis or fluorescence) detection usually show changes in elution time profiles from sample to sample, causing a loss of trilinearity in the data. In order to analyze them with an appropriate model, the latter should permit a given component to have different time profiles in different samples. Two popular models in this regard are multivariate curve resolution-alternating least-squares (MCR-ALS) and parallel factor analysis 2 (PARAFAC2). The conditions to be fulfilled for successful application of the latter model are discussed on the basis of simple chromatographic concepts. An exhaustive analysis of the multivariate calibration models is carried out, employing both simulated and experimental chromatographic data sets. The latter involve the quantitation of benzimidazolic and carbamate pesticides in fruit and juice samples using liquid chromatography with diode array detection, and of polycyclic aromatic hydrocarbons in water samples, in both cases in the presence of potential interferents using liquid chromatography with fluorescence spectral detection, thereby achieving the second-order advantage. The overall results seem to favor MCR-ALS over PARAFAC2, especially in the presence of potential interferents.

  18. Practical Session: Logistic Regression

    Science.gov (United States)

    Clausel, M.; Grégoire, G.

    2014-12-01

    An exercise is proposed to illustrate the logistic regression. One investigates the different risk factors in the apparition of coronary heart disease. It has been proposed in Chapter 5 of the book of D.G. Kleinbaum and M. Klein, "Logistic Regression", Statistics for Biology and Health, Springer Science Business Media, LLC (2010) and also by D. Chessel and A.B. Dufour in Lyon 1 (see Sect. 6 of http://pbil.univ-lyon1.fr/R/pdf/tdr341.pdf). This example is based on data given in the file evans.txt coming from http://www.sph.emory.edu/dkleinb/logreg3.htm#data.

  19. Prognostic Factors for Niche Development in the Uterine Caesarean Section Scar

    NARCIS (Netherlands)

    Voet, Lucy Lucet F van der; Vaate, A Marjolein J Bij de; Heymans, Martijn W; Brölmann, Hans A M; Veersema, Sebastiaan; Huirne, Judith A F

    In a prospective study on 134 women after their first cesarean section prognostic factors for developing an uterine niche (scar defect) measured with sonohysterography were evaluated. With multivariable logistic regression anlaysis the following prognostic factors were identified; enlarged cervical

  20. Risk factors for urinary tract infection among inpatients in department of urology:a logistic regression analysis%泌尿外科患者尿路感染危险因素logistic回归分析

    Institute of Scientific and Technical Information of China (English)

    才胜勇; 裴琼; 崔海军

    2011-01-01

    OBJECTIVE To investigate the high risk factors of urinary tract infection among inpatients in department of Urology. METHODS A total of 880 cases of urological medical records were analysised retrospectively. Patients with urinary tract infection were observed as a group, and the same number of urology patients without urinary tract infection were selected as the control group. Chi-square test and test were used to analysis possible single factors, and variables which had significant differences in univariate analysis were analysised by multivariable logistic regression. RESULTS Totally 60 cases were urinary tract infection, and the rate was 6.82%. Nine variables were risk factors effecting urinary tract infection in univariate analysis (P< 0. 05). Using logistic regression analysis, independent risk factors were selected according to the value of OR, which were older, invasive treatment measures, combined with other diseases, the prophylactic use of antibiotics. CONCLUSION Urinary tract infection had a higher incidence, and influenced by many factors among inpatients of department of urology.So, preventive measures should be taken by focusing on these factors.%目的 探讨引起泌尿外科住院患者尿路感染的危险因素.方法 回顾性分析880例泌尿外科住院病历,将合并尿路感染者作为观察组,按1:1选择同期无尿路感染泌尿外科患者作为对照组,对可能影响因素先进行单因素χ、t检验;然后将单因素分析差异有统计学意义的变量进行多元逐步logistic回归分析.结果 880例患者中合并尿路感染60例,发生率为6.82%;单因素分析9个变量是影响尿路感染危险因素(P<0.05),采用lo-gistic回归分析,筛选出独立危险因素,按OR值的大小,依次为年龄大、有创诊治措施、合并其他疾病、预防使用抗菌药物.结论 泌尿外科住院患者尿路感染发生率较高,影响因素较多,应针对上述因素予针对性预防措施.

  1. Study of variation in groundwater quality in a coastal aquifer in north-eastern Tunisia using multivariate factor analysis

    KAUST Repository

    Charfi, Sihem

    2013-07-01

    This work focuses on the Grombalia aquifer which constitutes the main water resource in Northeast Tunisia, Cap Bon Peninsula. The recharge of this aquifer is ensured mainly by direct infiltration of rainwater through permeable layers. Under semi-arid climatic conditions and increasing water demand for irrigation, about 80% of the Grombalia aquifer system shows different vulnerabilities to anthropogenic activities. The total dissolved solids values range from 0.75 to 5.6g/l.Isotopic characterization with stable isotopes (δ2H and δ18O) of Grombalia aquifer system identified geochemistry processes that control water chemistry. In addition, the multivariate statistical technique (Principal Component Analysis) was used to identify the origin, the recharge mode and geochemical processes controlling groundwater quality. The principal reactions responsible for the hydrochemical evolution in the Grombalia groundwater fall into three categories: (1) denitrification process; (2) dissolution of salts; and (3) irrigation return flow process. Tritium data in groundwater from the study area suggest the existence of pre1950 and post1960 recharge. © 2012 Elsevier Ltd and INQUA.

  2. Multivariate predictors of failed prehospital endotracheal intubation.

    Science.gov (United States)

    Wang, Henry E; Kupas, Douglas F; Paris, Paul M; Bates, Robyn R; Costantino, Joseph P; Yealy, Donald M

    2003-07-01

    Conventionally trained out-of-hospital rescuers (such as paramedics) often fail to accomplish endotracheal intubation (ETI) in patients requiring invasive airway management. Previous studies have identified univariate variables associated with failed out-of-hospital ETI but have not examined the interaction between the numerous factors impacting ETI success. This study sought to use multivariate logistic regression to identify a set of factors associated with failed adult out-of-hospital ETI. The authors obtained clinical and demographic data from the Prehospital Airway Collaborative Evaluation, a prospective, multicentered observational study involving advanced life support (ALS) emergency medical services (EMS) systems in the Commonwealth of Pennsylvania. Providers used standard forms to report details of attempted ETI, including system and patient demographics, methods used, difficulties encountered, and initial outcomes. The authors excluded data from sedation-facilitated and neuromuscular blockade-assisted intubations. The main outcome measure was ETI failure, defined as failure to successfully place an endotracheal tube on the last out-of-hospital laryngoscopy attempt. Logistic regression was performed to develop a multivariate model identifying factors associated with failed ETI. Data were used from 45 ALS systems on 663 adult ETIs attempted during the period June 1, 2001, to November 30, 2001. There were 89 cases of failed ETI (failure rate 13.4%). Of 61 factors potentially related to ETI failure, multivariate logistic regression revealed the following significant covariates associated with ETI failure (odds ratio; 95% confidence interval; likelihood ratio p-value): presence of clenched jaw/trismus (9.718; 95% CI = 4.594 to 20.558; p endotracheal tube through the vocal cords (7.653; 95% CI = 3.561 to 16.447; p < 0.0001); inability to visualize the vocal cords (7.638; 95% CI = 3.966 to 14.707; p < 0.0001); intact gag reflex (7.060; 95% CI = 3.552 to 14

  3. A nonlinearized multivariate dominant factor-based partial least squares (PLS) model for coal analysis by using laser-induced breakdown spectroscopy.

    Science.gov (United States)

    Feng, Jie; Wang, Zhe; Li, Lizhi; Li, Zheng; Ni, Weidou

    2013-03-01

    A nonlinearized multivariate dominant factor-based partial least-squares (PLS) model was applied to coal elemental concentration measurement. For C concentration determination in bituminous coal, the intensities of multiple characteristic lines of the main elements in coal were applied to construct a comprehensive dominant factor that would provide main concentration results. A secondary PLS thereafter applied would further correct the model results by using the entire spectral information. In the dominant factor extraction, nonlinear transformation of line intensities (based on physical mechanisms) was embedded in the linear PLS to describe nonlinear self-absorption and inter-element interference more effectively and accurately. According to the empirical expression of self-absorption and Taylor expansion, nonlinear transformations of atomic and ionic line intensities of C were utilized to model self-absorption. Then, the line intensities of other elements, O and N, were taken into account for inter-element interference, considering the possible recombination of C with O and N particles. The specialty of coal analysis by using laser-induced breakdown spectroscopy (LIBS) was also discussed and considered in the multivariate dominant factor construction. The proposed model achieved a much better prediction performance than conventional PLS. Compared with our previous, already improved dominant factor-based PLS model, the present PLS model obtained the same calibration quality while decreasing the root mean square error of prediction (RMSEP) from 4.47 to 3.77%. Furthermore, with the leave-one-out cross-validation and L-curve methods, which avoid the overfitting issue in determining the number of principal components instead of minimum RMSEP criteria, the present PLS model also showed better performance for different splits of calibration and prediction samples, proving the robustness of the present PLS model.

  4. A Comparison of Pseudo-Maximum Likelihood and Asymptotically Distribution-Free Dynamic Factor Analysis Parameter Estimation in Fitting Covariance-Structure Models to Block-Toeplitz Representing Single-Subject Multivariate Time-Series

    NARCIS (Netherlands)

    Molenaar, P.C.M.; Nesselroade, J.R.

    1998-01-01

    The study of intraindividual variability pervades empirical inquiry in virtually all subdisciplines of psychology. The statistical analysis of multivariate time-series data - a central product of intraindividual investigations - requires special modeling techniques. The dynamic factor model (DFM), w

  5. Logistic regression analysis of risk factors of oral lichen planus%口腔扁平苔藓发病相关风险因素的Logistic回归分析

    Institute of Scientific and Technical Information of China (English)

    郝玉娥

    2014-01-01

    Objective:To investigate and analyze the may causes of oral lichen planus ( OLP) risk factors,provide a theoretical basis for the prevention and treatment of lichen planus. Methods:Selected a qualified 130 patients with oral lichen planus,with the recent health examination in our hospital 130 cases of non-oral mucosal disease control study,the relevant survey data row two categories multivariate logistic regression analysis,to screen for risk factors associ-ated with the onset of OLP. Results:Logistic regression analysis showed that psychological factors,gastritis,local chemical stimulation and autonomic disor-ders with OLP was significantly correlated with the incidence. Conclusion:Onset and progression of oral lichen planus and multiple factors,Clinical cause of treatment should be to promote effective prevention and prognosis of OLP.%目的:对可能导致口腔扁平苔藓( OLP)发病的相关风险因素进行调查分析,为防治OLP提供理论依据。方法:选取符合条件的OLP患者130例,与近期在我院健康体检的130例非口腔黏膜病患者进行对照研究,将相关调查数据行二分类多因素Logistic回归分析,以筛查OLP发病的相关风险因素。结果:经Logistic回归分析结果显示,心理因素、胃炎、局部理化刺激和植物神经紊乱与OLP发病具有显著相关性。结论:OLP发病及病情进展与多因素有关,临床应有效进行病因治疗以促进OLP的预防及预后。

  6. Immediate versus delayed intramedullary nailing for open fractures of the tibial shaft: A multivariate analysis of factors affecting deep infection and fracture healing

    Directory of Open Access Journals (Sweden)

    Yokoyama Kazuhiko

    2008-01-01

    Full Text Available Background: The purpose of this study was to evaluate contributing factors affecting deep infection and fracture healing of open tibia fractures treated with locked intramedullary nailing (IMN by multivariate analysis. Materials and Methods: We examined 99 open tibial fractures (98 patients treated with immediate or delayed locked IMN in static fashion from 1991 to 2002. Multivariate analyses following univariate analyses were derived to determine predictors of deep infection, nonunion, and healing time to union. The following predictive variables of deep infection were selected for analysis: age, sex, Gustilo type, fracture grade by AO type, fracture location, timing or method of IMN, reamed or unreamed nailing, debridement time (≤6 h or> 6 h, method of soft-tissue management, skin closure time (≤1 week or> 1 week, existence of polytrauma (ISS< 18 or ISS≥18, existence of floating knee injury, and existence of superficial/pin site infection. The predictive variables of nonunion selected for analysis was the same as those for deep infection, with the addition of deep infection for exchange of pin site infection. The predictive variables of union time selected for analysis was the same as those for nonunion, excluding of location, debridement time, and existence of floating knee and superficial infection. Results: Six (6.1%; type II Gustilo n=1, type IIIB Gustilo n=5 of the 99 open tibial fractures developed deep infections. Multivariate analysis revealed that timing or method of IMN, debridement time, method of soft-tissue management, and existence of superficial or pin site infection significantly correlated with the occurrence of deep infection ( P < 0.0001. In the immediate nailing group alone, the deep infection rate in type IIIB + IIIC was significantly higher than those in type I + II and IIIA ( P = 0.016. Nonunion occurred in 17 fractures (20.3%, 17/84. Multivariate analysis revealed that Gustilo type, skin closure time, and

  7. Contributions of other socio-economic factors to the fertility differentials of women by education: a multivariate approach.

    Science.gov (United States)

    Das Gupta, P

    1984-01-01

    Data derived from the 1970 US Census indicate that fertility declines with increasing education level. In this paper, the author uses a method she developed earlier for decomposing the difference between rates into several components. Specifically, the difference in average number of children between groups dichotomized on the basis of wife's education is decomposed in terms of 6 other socioeconomic factors--husband's education, husband's occupation, wife's age at marriage, race, wife's labor force status, and family income. The fertility of wives who were not high school graduates was compared to that of high school graduates, and then a similar comparison was made between wives with high school education only and those with college education. All 6 factors examined were found to contribute positively to the overall reduction in number of children when wives advanced from non-high school graduate status to high school graduate status. On the other hand, comparisons between wives with 4 years of high school and those with a college education indicates that the .158 difference between their average number of children increases if the averages are controlled for differences in husband's education, race, or family income. For a more meaningful comparison of the effects of the 6 factors, all were considered simultaneously. Together these factors explained 51.3% of the difference in average number of children between those with and without a high school education, with husband's education making the largest (15.1%) contribution. In terms of college educated versus high school educated wives, the 6 factors explained 72.3% of the fertility difference, with wife's age at marriage making the largest (63.9%) contribution.

  8. A multivariate analysis of factors determining tumor progression in childhood low-grade glioma: a population-based cohort study (CCLG CNS9702)

    Science.gov (United States)

    Stokland, Tore; Liu, Jo-Fen; Ironside, James W.; Ellison, David W.; Taylor, Roger; Robinson, Kathryn J.; Picton, Susan V.; Walker, David A.

    2010-01-01

    The purpose of this study was to identify risk factors for the progression of low-grade glioma in children from a large population-based cohort. Patient and tumor details of a national cohort of children with low-grade glioma, recruited into an international multidisciplinary clinical strategy, were subjected to univariate and multivariate analyses of progression-free survival and overall survival. From the cohort of 798 patients, 639 patients were eligible, with a median age 6.71 years (0.26–16.75 years); 49% were males; 15.9% had neurofibromatosis type 1, 63.7% pilocytic astrocytoma, 5.9% fibrillary astrocytoma, 4.2% mixed neuronal-glial tumors, and 3.6% others; 21.1% were diagnosed clinically. Anatomically implicated were 31.6% cerebellum, 24.6% chiasma/hypothalamus, 16.0% cerebral hemispheres, 9.9% brain stem, 6.1% other supratentorial midline structures, 5.9% optic nerve only, 4.5% spinal cord, and 1.4% others. The 5-year overall survival and progression-free survival in the whole cohort were 94.6% and 69.4%, respectively. There was a significant association between age and site (P Multivariate analysis identified young age, fibrillary astrocytoma, and extent of surgical resection as significant independent risk factors for progression. Hypothalamic/chiasmatic tumors demonstrated the most sustained tendency to progress. In conclusion, the influence of age and anatomical site upon the risk of tumor progression suggests that these factors strongly influence tumor behavior for the majority of pilocytic tumors. Age <1 year and 1–5 years, fibrillary histology, completeness of resection, and chiasmatic location are candidates for stratification in future studies. PMID:20861086

  9. Multivariate Analysis of Factors Influencing Length of Hospital Stay after Coronary Artery Bypass Surgery in Tehran, Iran

    Directory of Open Access Journals (Sweden)

    Amin Torabipour

    2016-03-01

    Full Text Available Length of hospital stay (LOS is a key indicator for hospital management. Reducing hospital stay is a priority for all health systems. We aimed to determine the length of hospital stay following Coronary Artery Bypass Surgery (CABG based on its clinical and non-clinical factors. A cross-sectional study of 649 consecutive patients who underwent coronary artery bypass graft surgery was conducted in Imam Khomeini and Shariati university hospitals, Tehran, Iran. Data was analyzed by using non-parametric univariate tests and multiple linier regression models. Thirty seven independent variables including pre-operative, intra-operative and post-operative variables were analyzed. Finally, an appropriate model was constructed based on the associated factors. The results showed that 70.3% of the patients were male, and the mean age of the patients was 59.3 ± 10.4 years. The Mean (±SD and median of the LOS were 11.7 ± 7.1 and 9 days, respectively. Of 37 investigated variables, 24 qualitative and quantitative variables were significantly associated with length of stay (p<0.05. Multiple linear regression analysis showed that independent variables including age, medical insurance type, body mass index, and prior myocardial infarction; admission day, admission season, Cross-clamp time, pump usage, admission type, the number of laboratory tests and the number of specialty consultation had more effect on the hospital stay. We concluded that some significant factors influencing hospital stay after CABG were predictable and modifiable by hospital managers and decision makers to manage hospital beds.

  10. Logistics Management Information System

    Institute of Scientific and Technical Information of China (English)

    2002-01-01

    The logistics information is the logistics manageme nt 's inevitable request. The paper introduces several kinds of logistics informat ion system and their functions in the logistics management, such as the warehous e management system (WMS) in the delivery center, the control system for transpo rtation and delivery, the supply chain management (SCM), the optimization of th e logistics system, etc. In the author's opinion, the development of logistics could been divided into four phases. And the logistic...

  11. Resective surgery for liver tumor:a multivariate analysis of causes and risk factors linked to postoperative complications

    Institute of Scientific and Technical Information of China (English)

    Enrico Benzoni; Dario Lorenzin; Umberto Baccarani; Gian Luigi Adani; Alessandro Favero; Alessandro Cojutti; Fabrizio Bresadola; Alessandro Uzzau

    2006-01-01

    BACKGROUND: In spite of accurate selection of patients eligible for resection, and although advances in surgical techniques and perioperative management have greatly contributed to reducing the rate of perioperative deaths, stress must be placed on reducing the postoperative complication rates reported to be still as high as 50%. This study was designed to analyze the causes and foreseeable risk factors linked to postoperative morbidity on the grounds of data derived from a single-center surgical population. METHODS: From September 1989 to March 2005, 287 consecutive patients, affected either with HCC or liver metastasis, had liver resection at our department. Among the HCC series we recorded 98 patients (73.2%) in Child-Pugh class A, 32 (23.8%) in class B and 4 in class C (3%). In 104 colorectal metastases, 71% were due to colon cancer, 25% rectal, 3% sigmoid, and 1% anorectal. In 49 non-colorectal metastases, 22.4% were derived from breast cancer, 63.2% gastrointestinal tumors (excluding colon) and 14.4%other cancers. We performed 80 wedge resections, 77 bisegmentectomies and/or left lobectomies, 74 segmentectomies, 22 major hepatectomies, 20 left hepatectomies, and 14 trisegmentectomies. RESULTS: The in-hospital mortality rate in this series was 4.5%, and the morbidity rate was 47.7%, because of pleural effusion (30%), hepatic abscess (25%), hepatic insufifciency (19%), ascites (10%), hemoperitoneum (10%), or biliary ifstula (6%). The variables associated with the technical aspects of the surgical procedure that were responsible for the complications were: a Pringle maneuver length more than 20 minutes (P=0.001);the type of liver resection procedure, including major hepatectomy (P=0.02), left hepatectomy (P=0.04), trisegmentectomy (P=0.04), bisegmentectomy and/or left lobectomy (P=0,04);and a blood transfusion of more than 600 ml (P=0.04). CONCLUSION: The evaluation of causes and foreseeable risk factors linked to postoperative morbidity during the planning of

  12. EVALUATION OF CRITICAL SUCCESS FACTORS THROUGH THE USE OF MIND MAP IN THE LOGISTIC PROCESS OF A CUSTOMS CLEARANCE COMMISSIONER IN A BRAZILIAN COMPANY

    Directory of Open Access Journals (Sweden)

    Jadir Perpétuo dos Santos

    2015-06-01

    Full Text Available The objective of this work is to present, by the means of Mind Map, the critical success factors of the project developed by a Customs Clearance Commissioner. The research methodology used is exploratory, through interviews, based on the Delphi technique to obtain consensus, combined with the exploratory-descriptive analysis of a case study. The case study was observed in an unsystematic way, with an unstructured questionnaire. The conclusions presented here reveal two critical success factors in the import of parts and pieces, that are compounds of machines and industrial equipment, showing that the Mind Map is an innovative application for managing logistics projects, enabling better visualization of critical points, which brings improvements in the planning of activities for areas of knowledge, applied to the deployment project developed by the Customs Clearance Commissioner.

  13. 儿童情绪障碍相关因素的LOGISTIC回归分析%Logistic Regression Analysis of Related Risk Factors of Emotional Disorders in Children

    Institute of Scientific and Technical Information of China (English)

    高鸿云; 冯金英; 徐俊冕; 郑士俊

    2001-01-01

    Objective: To identify the related psychosocial risk factors of emotional disorders in children. Methods:To use case-control approach in which. Diagnosis was made by clinical interview according to ICD-10 criteria. Eighty eight cases and controls separately filled out general condition inventory. The results were put into Logistic regression model for analysis. Results: The children with timid personality, without kindergarten education, or with parents who were administrative or technical personnel, were apt to have emotional disorders. The children who were usually counseled by their mothers had less emotional disorders than those were beaten. Conclusion: The emotional disorders were the results of multiple factors. Prevention of children's emotional disorders should be focused on the children's personality and family education.

  14. Purified protein derivative skin testing on HIV/AIDS patients and logistic regression analysis of its risk factors

    Institute of Scientific and Technical Information of China (English)

    Fengren Liu; Jianjun Ye; Changfu Xiong; Jiguo Yin; Weihua He; Gaobo Li; Dingyuan Zhao; Linxiang Ye

    2007-01-01

    Objective: To understand the reactivity of purified protein derivative skin test(PPD test) in HIV-infected persons and to determine the influential factors associated with PPD. Methods: 174 HIV/AIDS patients registered in the local center for disease control and prevention(CDC) participated this study from April to June in 2006. Questionnaire, CD4 count and thoracic roentgenogram were performed for all participants. Results: In this study, response rate of questionnaires was 83.65%. The majority of these participants had a different degree of immunodeficiency that accounted for 93.64%. Female patients had a higher CD4 count than that of males. The total positive rate of PPD was 38.15%. Analysis of single factor in our study indicated that CD4 count, previous tuberculosis history, tuberculosis contact history and thoracic roentgenogram manifestation of patients were related to their PPD diameters. Further analysis of multiple factors also supports the previous conclusion that CD4 count and previous tuberculosis history of patients were risk factors in the PPD test. Conclusion: The PPD test of HIV/AIDS patients could be affected by several factors. For persons infected with HIV, the confirmation of latent tuberculosis infection (LTBI) should be considered the combination effect of previous MTB infection and body cellular immune function.

  15. TFP Growth Measurement and Factor Decomposition of Logistics Industry in China%我国物流业TF P增长率的测算及分解*

    Institute of Scientific and Technical Information of China (English)

    丁小平; 刘金东

    2013-01-01

    By setting up stochastic production frontier model from panel data of logistic industry of China during 1997 to 2011,by the method proposed by Kumbhakar and Lovell (2000),this paper measures and decomposes the TFP growth rate of logistics industry in China.Analysis shows that the fundamental reason for TFP growth is technical progress while the factors of technical efficiency improvement,scale efficiency and allocation efficiency have reduction effect on technical progress factor,and that technical improvement and scale efficiency factor decrease year by year,however,allocation efficiency increases year by year.The further Gini decomposition of regional difference in China’s TFP growth rate of logistic industry shows that technical efficiency improvement and allocation efficiency serve as the main contributor to regional disparity of TFP growth,which indicate that there is big periodic difference between each province or municipality.The promotion of China’s long-term development level of logistic industry not only depends on technical progress factor from the introduction of advanced technology and method but also demands the improvement of technical efficiency,scale efficiency and allocation efficiency, however,the reduction of regional difference of logistic industry needs the improvement of technical efficiency and allocation efficiency in backward area.%采用1997-2011年我国31个省区物流业面板数据建立随机生产边界模型,利用Kumbhakar等(2000)的方法对我国物流业TFP增长率进行测算和分解,分析表明:技术进步因素是我国物流业TFP 增长的主要原因,技术效率改进、规模效率和配置效率因素均存在对技术进步因素的抵减效应;技术效率改进和规模效率因素的作用逐年递减,而配置效率因素的作用逐年上升。进一步对我国物流业TFP增长率的区域差异进行基尼分解,结果表明技术效率和配置效率

  16. Unconditional logistic regression analysis of the cancer risk factors in the elderly people in Weifang Community%潍坊社区老年人恶性肿瘤危险因素非条件Logistic回归分析

    Institute of Scientific and Technical Information of China (English)

    刘葳

    2014-01-01

    目的:分析社区老年人常见恶性肿瘤的危险因素。方法:病例对照;肺癌、胃、结直肠癌、乳腺癌发病危险单因素和多因素非条件Logistic回归分析。结果:肺癌、胃癌、结直肠癌和乳腺癌共同危险因素有性子急、负性生活事件、平时心情不愉快。有吃夜宵习惯、吸烟、脑力活动为主的职业会增加患肿瘤的风险。以荤菜为主的饮食方式、进食速度快、和消化系统疾病史为胃癌、结直肠癌的危险因素;以素食为主的饮食方式对胃、结直肠癌具有保护作用,平均每周体力活动天数≥2d为肿瘤的保护因素。结论:饮食、行为等因素是目前老年人常见恶性肿瘤的影响因素。%Objective:To analyze the risk factors of the common malignant tumors in the community elderly people. Methods:The method was a case-control study;the occurrence risk factors of the cancers of lung, stomach, colorectal cancer, and breast cancer were analyzed with the univariate and multivariate unconditional logistic regression. Results:The common risk factors of those cancers were the quick temper, negative life events, and usually unpleasant mood. The habit of eating food at late night, smoking, and mental activity dominated occupations could increase the risk of having cancers. The diet dominated by the meat dish, eating fast, and the history of the digestive diseases were the risk factors for the stomach and colorectal cancers. Predominantly vegetarian diet had a protective role for the gastric and colorectal cancers, and the number of the average weekly physical activities days≥2 d was the protective factor for the tumors. Conclusion:The diet, behavior and other factors are the risk factors for the common cancers of the elderly people at present.

  17. The multivariable analysis of prognostic factors of elderly patients with nosocomial Candidemia in intensive care unit%影响老年危重病念珠菌血症患者预后的多因素分析

    Institute of Scientific and Technical Information of China (English)

    杨向红; 孙仁华; 洪军

    2010-01-01

    目的 探讨重症监护病房(ICU)内老年院内念珠菌血症患者预后的影响因素.方法 收集2001-2008年我院75例院内获得性念珠菌血症老年患者的临床资料,根据预后分为死亡组和生存组,运用多因素Logistic回归分析方法探讨老年念珠菌血症患者预后的影响因素.结果 75例患者血培养共分离出75株念珠菌菌株,其中白色念珠菌22株(29.3%),非白色念珠菌为53株(70.7%);非白色念珠菌对氟康唑敏感率低,病死率达48.0%.多因素Logistic回归分析显示,感染性休克、合并细菌血症、血清肌酐升高及感染相关器官功能衰竭评分(SOFA评分)>10分是死亡的独立危险因素(Ward值分别为6.34、5.15、8.04、6.82,均为P<0.05).结论 老年院内获得性念珠菌血症患者病死率高,感染以非白色念珠菌为主,且对氟康唑耐药,应加强真菌药敏监测及危险因素监测,及时、合理使用抗真菌药物有助于改善预后.%Objective To evaluate the prognostic factors of elderly patients with noscomial Candidemia in intensive care unit. Methods A retrospective study was carried out in 75 elderly patients with noscomial Candidemia from 2001 to 2008. Multivariate logistic regression analysis was performed to find the correlations of prognosis with clinical and biochemical parameters. Results A total of 75 Candida strains were isolated from blood. The proportion of non-albicans species reached to 70.7%. Fluconazole-resistant candidiasis was increased. Overall mortality rate was 48.0%.Multivariate logistic regression analysis showed that septic shock, comorbid bacteremia, higher serum creatinine and sequential organ failure assessment (SOFA) score more than 10 were independent predictors for in-hospital mortality (Ward=6.34, 5.15, 8.04, 6.82, all P>0.05). Conclusions Noscomical Candidemia in elderly critical illness patients leads a high mortality, the proportion of nonalbicans species and fluconazole-resistant candidiasis

  18. Managing Reverse Logistics or Reversing Logistics Management?

    OpenAIRE

    Brito, Marisa

    2004-01-01

    textabstractIn the past, supply chains were busy fine-tuning the logistics from raw material to the end customer. Today an increasing flow of products is going back in the chain. Thus, companies have to manage reverse logistics as well.This thesis contributes to a better understanding of reverse logistics. The thesis brings insights on reverse logistics decision-making and it lays down theoretical principles for reverse logistics as a research field.In particular it puts together a framework ...

  19. Organic Versus Contractor Logistics Support For Depot-Level Repair: Factors That Drive Sub-Optimal Decisions

    Science.gov (United States)

    2016-02-16

    incentive. Under CLS, the vendor expects to make a profit. The amount of profit is determined by contract type ( Cost Plus , Firm Fixed Price , etc.) and...of the price calculation. In this sense, the price of the work equals the cost of the work. If the work and the labor efficiency were the same...understanding of cost and pricing motives in the maintenance support decision. Profit incentive is not the only factor influencing cost of maintenance

  20. Systematic Selection of Key Logistic Regression Variables for Risk Prediction Analyses: A Five-Factor Maximum Model.

    Science.gov (United States)

    Hewett, Timothy E; Webster, Kate E; Hurd, Wendy J

    2017-08-16

    The evolution of clinical practice and medical technology has yielded an increasing number of clinical measures and tests to assess a patient's progression and return to sport readiness after injury. The plethora of available tests may be burdensome to clinicians in the absence of evidence that demonstrates the utility of a given measurement. Thus, there is a critical need to identify a discrete number of metrics to capture during clinical assessment to effectively and concisely guide patient care. The data sources included Pubmed and PMC Pubmed Central articles on the topic. Therefore, we present a systematic approach to injury risk analyses and how this concept may be used in algorithms for risk analyses for primary anterior cruciate ligament (ACL) injury in healthy athletes and patients after ACL reconstruction. In this article, we present the five-factor maximum model, which states that in any predictive model, a maximum of 5 variables will contribute in a meaningful manner to any risk factor analysis. We demonstrate how this model already exists for prevention of primary ACL injury, how this model may guide development of the second ACL injury risk analysis, and how the five-factor maximum model may be applied across the injury spectrum for development of the injury risk analysis.

  1. Study on Performance Influencing Factors of Listed Logistics Enterprises%物流业上市企业市场绩效的影响因素研究

    Institute of Scientific and Technical Information of China (English)

    曹小华; 欧国立

    2011-01-01

    从微观的角度来考察物流业的行业绩效以及影响因素.通过搜集整理中国上市公司中归属物流业的公司财务信息,构建企业绩效测度指标,并从财务指标、公司治理指标以及市场信息指标的角度考察影响物流业的市场绩效的因素.结果发现,国有企业和民营企业在绩效影响因素方面存在差别;债务杠杆率对企业绩效为负向效应,财务测度促进了企业的绩效;公司的风险较为显著的降低了企业的绩效;股权制衡对公司的绩效起到了提升作用;企业规模与公司绩效显著正相关.%This paper presents a microscopic view on the factors influencing logistics enterprise performance. Through collecting and analyzing the corporate financial information concerning the logistics enterprises listed in the Chinese stock market, the paper estabhshes an enterprise performance index system which measures the impact of financial, managerial and information factors upon the market performance of the enterprises and finds that there is spread between state-owned and private enterprises regarding the effects of the factors and that debt leverage and corporate risk exposure are negatively related to enterprise performance and financial measurability, equity balance and enterprise scale are positively so.

  2. 婴幼儿猛性龋危险因素的Logistic分析%The risk factors of baby bottle tooth decay by logistic regression analysis

    Institute of Scientific and Technical Information of China (English)

    刘淑杰; 朱剑东; 陈旭; 魏庆

    2000-01-01

    目的:探讨引起婴幼儿猛性龋的危险因素。方法:龋病危险因素调查和菌斑pH检测。应用Lo-gistic回归分析的方法研究婴幼儿猛性龋与危险因素之间的数量关系。结果:喂养时间、奶瓶内容、甜食习惯和菌斑pH值4项是婴幼儿猛性龋的危险因素。婴幼儿猛性龋的发病情况与用Logistic回归分析计算结果的判断情况一致率为96.2%。结论:用此4项来预测婴幼儿猛性龋比单纯用细菌学参数更为准确。%AIM: To study the risk factors of baby bottle tooth decay(BBTD). METHODS: To investigate the risk factom of caries and their plaque pH. The numeral relationship between the risk fctors and BBTD was studied by the Logistic regression analysis. RESULTS: Feeding time, baby bottle composition, desert habit and plaque pH were the risk factors. The coincidence between the prevalence of BBTD and the results of Logistic regression analysis was 96.2 %. CONCLUSION: It suggested that the four risk factors are more accurate than mere bacterial parameter in BBTD prediction.

  3. Likelihood estimators for multivariate extremes

    KAUST Repository

    Huser, Raphaël

    2015-11-17

    The main approach to inference for multivariate extremes consists in approximating the joint upper tail of the observations by a parametric family arising in the limit for extreme events. The latter may be expressed in terms of componentwise maxima, high threshold exceedances or point processes, yielding different but related asymptotic characterizations and estimators. The present paper clarifies the connections between the main likelihood estimators, and assesses their practical performance. We investigate their ability to estimate the extremal dependence structure and to predict future extremes, using exact calculations and simulation, in the case of the logistic model.

  4. Multivariate curve resolution based chromatographic peak alignment combined with parallel factor analysis to exploit second-order advantage in complex chromatographic measurements.

    Science.gov (United States)

    Parastar, Hadi; Akvan, Nadia

    2014-03-13

    In the present contribution, a new combination of multivariate curve resolution-correlation optimized warping (MCR-COW) with trilinear parallel factor analysis (PARAFAC) is developed to exploit second-order advantage in complex chromatographic measurements. In MCR-COW, the complexity of the chromatographic data is reduced by arranging the data in a column-wise augmented matrix, analyzing using MCR bilinear model and aligning the resolved elution profiles using COW in a component-wise manner. The aligned chromatographic data is then decomposed using trilinear model of PARAFAC in order to exploit pure chromatographic and spectroscopic information. The performance of this strategy is evaluated using simulated and real high-performance liquid chromatography-diode array detection (HPLC-DAD) datasets. The obtained results showed that the MCR-COW can efficiently correct elution time shifts of target compounds that are completely overlapped by coeluted interferences in complex chromatographic data. In addition, the PARAFAC analysis of aligned chromatographic data has the advantage of unique decomposition of overlapped chromatographic peaks to identify and quantify the target compounds in the presence of interferences. Finally, to confirm the reliability of the proposed strategy, the performance of the MCR-COW-PARAFAC is compared with the frequently used methods of PARAFAC, COW-PARAFAC, multivariate curve resolution-alternating least squares (MCR-ALS), and MCR-COW-MCR. In general, in most of the cases the MCR-COW-PARAFAC showed an improvement in terms of lack of fit (LOF), relative error (RE) and spectral correlation coefficients in comparison to the PARAFAC, COW-PARAFAC, MCR-ALS and MCR-COW-MCR results.

  5. 泌尿系肿瘤患者尿路感染危险因素Logistic回归分析%Logistic Regression Analysis of Risk Factors for Urinary Tract Infection in Patients with Urinary Tract Cancer

    Institute of Scientific and Technical Information of China (English)

    彭传真; 宋兆录; 卜秀娟

    2016-01-01

    Objective To investigate the risk factors of urinary tract infection in patients with tumor in De-partment of urology. Methods a retrospective analysis was made on 200 cases of tumor in Department of Urolo-gy,The tumor associated with urinary tract infection as the observation group,According to 1:1 choice compared with no urinary tract infection of urological patients as the control group,on factors that may affect the first single factor V2 and t test;then the single factor analysis,the difference is statistically significant variables of multiva-riate stepwise logistic regression analysis. Results in 200 patients with urinary tract infection in 26 patients,the incidence rate of 13%;univariate analysis of the seven variables is urinary tract infection effects of risk factors (P < 0. 05),using logistic regression analysis,independent risk factors were screened out,or by value size, followed by age,accompanied by a diagnosis and treatment measures,combined with other diseases. Conclu-sions The incidence of urinary tract infection in patients with tumor in Department of Urology is high,and the factors affecting urinary tract infection are more,and the preventive measures should be given according to the factors.%目的:探讨引起泌尿外科肿瘤住院患者尿路感染的危险因素。方法回顾性分析了200例泌尿外科肿瘤住院病历,将肿瘤合并尿路感染者作为观察组,按1∶1选择同期无尿路感染泌尿外科患者作为对照组,对可能的影响因素先进行了单因素V2、t检验;然后将单因素分析差异有统计学意义的变量进行多元逐步Logistic回归分析。结果200例患者中合并尿路感染26例,发生率为13%;单因素分析了7个变量是尿路感染有影响的危险因素(P<0.05),采用了Logistic回归分析,筛选出独立危险因素,按OR值的大小,依次为年龄大、伴有创诊治措施、合并其他的疾病。结论泌尿外科肿瘤住院患者尿路

  6. Complex logistics audit system

    Directory of Open Access Journals (Sweden)

    Zuzana Marková

    2010-02-01

    Full Text Available Complex logistics audit system is a tool for realization of logistical audit in the company. The current methods for logistics auditare based on “ad hok” analysis of logisticsl system. This paper describes system for complex logistics audit. It is a global diagnosticsof logistics processes and functions of enterprise. The goal of logistics audit is to provide comparative documentation for managementabout state of logistics in company and to show the potential of logistics changes in order to achieve more effective companyperformance.

  7. Combining or Separating Forward and Reverse Logistics

    DEFF Research Database (Denmark)

    Herbert-Hansen, Zaza Nadja Lee; Larsen, Samuel; Nielsen, Anders

    2017-01-01

    Purpose – While forward logistics handles and manages the flow of goods downstream in the supply chain from suppliers to customers, reverse logistics (RL) manages the flow of returned goods upstream. A firm can combine reverse logistics with forward logistics, keep the flows separated, or choose......-research addresses intra-RL issues while the relationship between forward and reverse logistics is under-researched. This paper contributes to RL-theory by identifying the contextual factors that determine the most advantageous relationship between forward and reverse logistics, and proposes a novel decision making...

  8. Evaluation via multivariate techniques of scale factor variability in the rietveld method applied to quantitative phase analysis with X ray powder diffraction

    Directory of Open Access Journals (Sweden)

    Terezinha Ferreira de Oliveira

    2006-12-01

    Full Text Available The present work uses multivariate statistical analysis as a form of establishing the main sources of error in the Quantitative Phase Analysis (QPA using the Rietveld method. The quantitative determination of crystalline phases using x ray powder diffraction is a complex measurement process whose results are influenced by several factors. Ternary mixtures of Al2O3, MgO and NiO were prepared under controlled conditions and the diffractions were obtained using the Bragg-Brentano geometric arrangement. It was possible to establish four sources of critical variations: the experimental absorption and the scale factor of NiO, which is the phase with the greatest linear absorption coefficient of the ternary mixture; the instrumental characteristics represented by mechanical errors of the goniometer and sample displacement; the other two phases (Al2O3 and MgO; and the temperature and relative humidity of the air in the laboratory. The error sources excessively impair the QPA with the Rietveld method. Therefore it becomes necessary to control them during the measurement procedure.

  9. Prevalence of agglutinating antibodies to Toxoplasma gondii in small ruminants of the Madrid region, Spain, and identification of factors influencing seropositivity by multivariate analysis.

    Science.gov (United States)

    Mainar, R C; de la Cruz, C; Asensio, A; Domínguez, L; Vázquez-Boland, J A

    1996-01-01

    A seroepidemiological survey of Toxoplasma gondii infection in sheep and goats was conducted in the Madrid region of Spain. Sera were collected from 60 herds, for which farming management information and other relevant data for their characterization were also obtained through a questionnaire. The seroprevalence was 11.8% (64 out of 541), using the modified (2-mercaptoethanol) direct agglutination technique with a 1:64 cut-off titre. The relationship between seropositivity and the variables in the questionnaire was assessed by multivariate analysis. Four variables were found to be significantly associated with seroprevalence. Two of them, the presence of cats and a previous history of abortion outbreaks in the farm, were factors known to be linked with toxoplasmosis, indicating the validity of the serological data. Seropositivity was also related to a lack of replacements in the preceding year. Proximity to other farms appeared to be a protective factor negatively associated with seropositivity, probably because it was an indicator of proximity to an urban area and the availability of local sanitary facilities.

  10. Clinical and Histological Prognostic Factors in Axillary Node-Negative BreastCancer: Univariate and Multivariate Analysis with Relation to 5-Year Recurrence.

    Science.gov (United States)

    Khanna; Tokuda; Shibuya; Tanaka; Sekine; Tajima; Osamura; Mitomi

    1995-04-30

    In the recent years several studies have shown that about 30% of cases with axillary node-nagative breast cancer suffer relapse of the disease. Our attempt was made to evaluate the most significant prognostic factors to predict this high risk group which may be benefited from adjuvant treatment. For this purpose, we selected 9 patients out of 80 cases of node-negative breast cancer who had been followed up at least for 5 years and had the recurrence of the disease. For comparison, 16 patients from the same group who did not have relapse were selected on a random basis. Histology, receptor status, AgNOR, DNA flow cytometry and various immunohistochemical parameters were compared between the groups with recurrence and that without recurrence. On univariate analysis, tumor size, immunohistochemical expressions of PCNA, MIB-1, c-erbB-2 and S-phase fraction were significantly different between the above two groups. By multivariate analysis, immunohistochemical c-erbB-2 expression (more than 50% of cancer cells) was an independent parameter. As a summary from our studies, c-erbB-2 immunohistochemical staining on paraffin sections might be the best independent prognostic factor in axillary node-negative breast cancers.

  11. The Influencing Factors Analysis of Clothing Brand Loyalty Based on Ordinal Logistic Regression%基于Logistic回归服装品牌忠诚度影响因素分析

    Institute of Scientific and Technical Information of China (English)

    陈建伟; 徐娟娟

    2012-01-01

    Based on the clothing industry characteristics and the level of consumers and business enterprise, this paper puts forward the model of factors affecting clothing brand loyalty. According to the research hypotheses form questionnaire index system, using the recovery of data, 11 main components are extracted by the factor analysis and cluster analysis of multivariate statistical methods. Then using ordinal logistic regression model to deal with the 11 main components, we get significant factors that affect clothing brand loyalty, which from the biggest to the smallest are as follows: the attitude of risk .aversion, clothing attribute, the mentality of diversity seeking, attitude towards the concept of self-image, convenient buying, service integrity, promotion-oriented. Finally, these influencing factors are analyzed by two dimensions of clothing brand loyalty-behavior loyalty &. attitude loyalty. The results show that the factors influencing behavior loyalty and attitude loyalty are not completely the same and the influence extent is of great difference.%基于服装行业特点、企业层面和消费者层面,提出了服装品牌忠诚度影响因素模型.根据研究假设形成调查问卷指标体系,利用回收的数据,运用因子分析和聚类分析等多元统计方法提取了11个主因子,并用序次Logistic回归模型进行处理分析,结果显示,影响服装品牌忠诚度的显著因子从大到小依次为:风险规避态度、服装属性、多样性寻求心态、自我形象概念态度、购买便利性、服务完整性、促销与推广,并分别从服装品牌忠诚的两个维度,即行为忠诚和态度忠诚对这些主因子的作用进行分析,研究结果表明,由于影响行为忠诚和态度忠诚的因素不完全相同,所以影响程度也存在较大差异.

  12. Logistic regression analysis of correlative factors for 413 asthma children%413例儿童哮喘危险因素Logistic回归分析

    Institute of Scientific and Technical Information of China (English)

    陈建平; 赵婉莹; 何念海; 周平; 王刚; 汪万军

    2011-01-01

    目的 调查重庆地区儿童哮喘发病的相关因素,为本地区儿童哮喘的防治提供参考.方法 第三军医大学西南医院儿科哮喘门诊或儿科病房2007年6月至2010年12月期间哮喘儿童413例,采取数字随机法选取同期来院体检及就诊非哮喘的儿童420例作为对照.通过问卷调查和做相应检查,追溯哮喘病史并随访其治疗情况,寻找哮喘发病的相关因素.结果 调查10个相关因素,经非条件Logistic回归分析,最终发现6个危险因素和2个保护因素,其中家族遗传性、特应性体质、皮肤点刺阳性、总IgE是儿童哮喘的高危因素.结论 遗传因素与哮喘密切相关,特应性体质是儿童哮喘的危险因素.母乳喂养和HAV感染为儿童哮喘保护因素.%Objective To study the correlative factors for asthma children in Chongqing, China. Methods This study enrolled 413 children with asthma from the Pediatric Asthma Outpatient Department and Pediatric Ward of Southwest Hospital of Third Military Medical University from Jun. 2007 to Dec. 2010. The control group included 420 children without asthma from the outpatients and the children who accepted physical examination in our hospital. Questionnaires, examinations, asthma history analysis and following-up were used to determine the correlative factors for asthma children. Results Totally 10 factors were investigated and analyzed by Logistic regression analysis. Two factors were excluded and eight factors were included in the end, and among the eight factors there were six risk factors and two protective factors. High risk factors included heredofamilial asthma, atopic constitution, positive response to skin prick test (SPT), and high total IgE level. Conclusion Genetic factors are closely correlated with the development of asthma children, and atopic constitution is a risk factor for asthma children. Protective factors include breastfeeding and hepatitis A virus (HAV) infection.

  13. Logistic regression analysis of factors affecting blood culture positive and countermeasures%影响血培养阳性的Logistic回归分析及对策

    Institute of Scientific and Technical Information of China (English)

    柴建华; 常洪美; 李炼; 凌冬; 陈玲; 张丕

    2015-01-01

    目的:探讨影响血培养阳性的因素,提出相应的对策。方法对2014年1~6月送检血培养标本的病例,采用单因素χ2检验和多因素Logistic回归分析相结合的方法,探讨血培养阳性的影响因素。结果该院血培养阳性率为12.83%。Logistic回归分析发现:患者发热程度(OR=1.772,P=0.002)、是否使用抗菌药物(OR=0.551,P=0.026)、抽血时机是否正确(OR=4.585,P=0.047)是血培养阳性的影响因素。结论该院血培养阳性率低,应根据分析出的影响因素采取相应的对策。%Objective To investigate the factors affecting blood culture positive ,and to put forward the corre‐sponding countermeasures .Methods The single factor χ2 test was adopted by combining with the multiple factors Logistic regression analysis method to statistically analyze the cases of blood culture in our hospital from January to June 2014 for investigating the influence factors of blood culture positive .Results The blood culture positive rate in our hospital was 12 .83% .The Logistic regression analysis found that the fever degree (OR= 1 .772 ,P= 0 .002) , whether using antimicrobial agents (OR=0 .551 ,P=0 .026) ,whether blood collection timing being correct (OR=4 .585 ,P=0 .047) were the influence factors of blood culture positive .Conclusion The blood culture positive rate is low in our hospital ,the corresponding countermeasures should be adopted according to the extracted influence fac‐to rs .

  14. Long-term outcome after neoadjuvant radiochemotherapy in locally advanced noninflammatory breast cancer and predictive factors for a pathologic complete remission. Results of a multivariate analysis

    Energy Technology Data Exchange (ETDEWEB)

    Matuschek, C.; Boelke, E.; Roth, S.L. [Duesseldorf Univ. (Germany). Dept. of Radiation Oncology] [and others

    2012-09-15

    An earlier published series of neoadjuvant radiochemotherapy (NRT-CHX) in locally advanced noninflammatory breast cancer (LABC) has now been updated with a follow-up of more than 15 years. Long-term outcome data and predictive factors for pathologic complete response (pCR) were analyzed. Patients and methods: During 1991-1998, 315 LABC patients (cT1-cT4/cN0-N1) were treated with NRT-CHX. Preoperative radiotherapy (RT) consisted of external beam radiation therapy (EBRT) of 50 Gy (5 x 2 Gy/week) to the breast and the supra-/infraclavicular lymph nodes combined with an electron boost in 214 cases afterwards or - in case of breast conservation - a 10-Gy interstitial boost with {sup 192}Ir afterloading before EBRT. Chemotherapy was administered prior to RT in 192 patients, and concomitantly in 113; 10 patients received no chemotherapy. The update of all follow-up ended in November 2011. Age, tumor grade, nodal status, hormone receptor status, simultaneous vs. sequential CHX, and the time interval between end of RT and surgery were examined in multivariate terms with pCR and overall survival as end point. Results: The total pCR rate after neoadjuvant RT-CHX reached 29.2%, with LABC breast conservation becoming possible in 50.8% of cases. In initially node-positive cases (cN+), a complete nodal response (pN0) after NRT-CHX was observed in 56% (89/159). The multivariate analysis revealed that a longer time interval to surgery increased the probability for a pCR (HR 1.17 [95% CI 1.05-1.31], p < 0.01). However, in large tumors (T3-T4) a significantly reduced pCR rate (HR 0.89 [95% CI 0.80-0.99], p = 0.03) was obtained. Importantly, pCR was the strongest prognostic factor for long-term survival (HR 0.28 [95% CI 0.19-0.56], p < 0.001). Conclusion: pCR identifies patients with a significantly better prognosis for long-term survival. However, a long time interval to surgery (> 2 months) increases the probability of pCR after NRT-CHX. (orig.)

  15. Factors Influencing the Logistics Management Performance and Performance Evaluation Mode%后勤管理绩效的影响因素及绩效评价模型初探

    Institute of Scientific and Technical Information of China (English)

    杜清华

    2011-01-01

    Based on analysis on the subjective and objective factors influencing the performance of logistics management, the establishment of performance evaluation model for logistics management is discussed.%在对后勤管理缋效的主观和客观影响因素分析的基础上,对后勤管理绩效评价模型的构建进行了初步的探讨.

  16. Logistic regression analysis on risk factors of deep vein thrombosis in spinal operation%脊柱手术发生下肢静脉血栓的相关危险因素Logistic回归分析

    Institute of Scientific and Technical Information of China (English)

    李刚建; 赵鑫

    2015-01-01

    Objective To explore the risk factors for deep vein thrombosis (DVT) in spinal operation. Methods The prevalence of DVT in 202 patients with spinal operation was studied, and the the clinical data of pa-tients with or without lower extremity DVT were analyzed comparatively. Single factor analysis was performed using the chi-squared test, and multivariate analysis was performed using multivariate unconditional Logistic regression analysis. Results Age (OR=3.434, 95%CI:0.445~2.452), body mass index (BMI, OR=3.243, 95%CI:0.452~2.423), triglyceride (TG, OR=3.535, 95%CI:0.353~3.224), prothrombintime (PT, OR=4.545, 95%CI:0.463~3.563) were risk factors of lower extremity DVT in spinal surgery. Physical anticoagulant therapy (OR=4.864, 95%CI: 0.553~2.563) was protective factors for the the formation of lower extremity DVT in spinal surgery. Conclusion Deep vein throm-bosis in spinal operation is the results of many factors. Preoperative active measures should be taken to assess risk fac-tors in order to reduce deep vein thrombosis.%目的:探讨脊柱手术发生下肢静脉血栓(DVT)的相关危险因素。方法对202例脊柱手术的下肢DVT进行研究,并对发生下肢DVT患者和未发生下肢DVT患者的临床资料进行对比分析,单因素分析采用χ2检验,多因素分析采用多因素非条件Logistic回归进行分析。结果年龄(OR=3.434,95%CI:0.445~2.452)、体重指数(BMI,OR=3.243,95%CI:0.452~2.423)、血清甘油三脂水平(TG,OR=3.535,95%CI:0.353~3.224)、凝血酶原时间(PT,OR=4.545,95%CI:0.463~3.563)是脊柱手术发生下肢DVT形成的危险因素,物理抗凝治疗(OR=4.864,95%CI:0.553~2.563)是脊柱手术发生下肢DVT形成的保护性因素。结论脊柱手术发生下肢DVT是多因素作用的共同结果,应采取积极的预防措施,以避免下肢DVT的形成。

  17. [Logistic regression analysis for factors affecting 
the successful rate of nano-carbon in sentinel lymph 
node biopsy].

    Science.gov (United States)

    Wang, Xinzheng; Liu, Jinbiao; Hou, Yongqiang; Wang, Ning; Wang, Mingjun

    2016-04-01

    To explore the factors affecting the successful rate of nano-carbon in sentinel lymph node biopsy.
 A total of 270 patients with breast cancer, who were treated in First Affilitated Hospital of Henan University of Science and Technology from January 2013 to March 2015, were chosen and given sentinel lymph node biopsy (SLN) with nano-carbon, and the influencial factors were examined by logistic analysis.
 Successful rate of biopsy, accuracy, sensitivity and false negative rate was 92.2%, 97.6%, 93.1% and 6.8%, respectively. Age, primary tumor lesions, body mass index, axillary lymph node status, number of SLN and pathological grade were the factors affetcing successful biopsy (all Pbiopsy (all Pbiopsy, tumor location, affected sides, injection sites and chemotherapy showed little effect on the successful rate of biopsy (all P> 0.05).
 Nano-carbon tracer method is a reliable method in sentinel lymph node biopsy. The body mass index, age, and number of lymph node metastasis greatly impact the successful rate of biopsy.

  18. BODY ADIPOSITY INDEX AND ASSOCIATED FACTORS IN ADULTS: METHOD AND LOGISTICS OF A POPULATION-BASED STUDY.

    Science.gov (United States)

    Segheto, Wellington; Cristina Guimarães da Silva, Danielle; Araújo Coelho, France; Guimarães Reis, Vanessa; Helena Oliveira Morais, Silvia; Carlos Bouzas Marins, João; Queiroz Ribeiro, Andreia; Zarbato Longo, Giana

    2015-07-01

    Introducción: la obesidad es un problema de salud pública que ha aumentado considerablemente. Se han desarrollado distintas técnicas para medir la cantidad de grasa corporal, o una combinación de exceso de grasa con ciertas comorbilidades. El Índice de Adiposidad Corporal es un nuevo método propuesto para determinar la grasa corporal y su validación es aún limitada. Solo hay algunos métodos y logísticas de estudios poblacionales recogidos en la bibliografía, la mayoría de equipos multidisciplinares. Objetivo: el objetivo consistió en informar de los procedimientos de un estudio poblacional, para concluir en el índice de adiposidad en adultos. Diseño: el diseño de este estudio fue transversal, con una muestra de 1.085 adultos con edades entre 20 y 59 años, que vivían en la ciudad de Viçosa, MG. Se aplicó un cuestionario para completar en casa, con aspectos sociodemográficos, conductuales, de salud y del nivel de actividad física. Después se recopilaron los valores antropométricos y bioquímicos. La formación para la recogida de datos incluyó el calibrado de los evaluadores, estableciéndose la correlación entre las mediciones a partir de una comprobación mediante una prueba de correlación intraclase, siendo 0,60 el valor definido como aceptable. Resultados: se observa que, a excepción del evaluador 1, para los pliegues cutáneos subescapulares, y del evaluador 4, para los pliegues cutáneos pectorales y suprailiacos, el resto de mediciones alcanzaron un nivel aceptable de acuerdo entre los evaluadores. Conclusiones: la investigación multidisciplinar es importante para comprender los distintos factores que podrían intervenir en la herramienta de evaluación de salud y enfermedad. Se deberían seguir los aspectos metodológicos y logísticos descritos en este estudio, los cuales llevan a una reducción continua de los sesgos de la investigación.

  19. Prediction of Foreign Object Debris/Damage type based in human factors for aeronautics using logistic regression model

    Science.gov (United States)

    Romo, David Ricardo

    Foreign Object Debris/Damage (FOD) has been an issue for military and commercial aircraft manufacturers since the early ages of aviation and aerospace. Currently, aerospace is growing rapidly and the chances of FOD presence are growing as well. One of the principal causes in manufacturing is the human error. The cost associated with human error in commercial and military aircrafts is approximately accountable for 4 billion dollars per year. This problem is currently addressed with prevention programs, elimination techniques, and designation of FOD areas, controlled access, restrictions of personal items entering designated areas, tool accountability, and the use of technology such as Radio Frequency Identification (RFID) tags, etc. All of the efforts mentioned before, have not show a significant occurrence reduction in terms of manufacturing processes. On the contrary, a repetitive path of occurrence is present, and the cost associated has not declined in a significant manner. In order to address the problem, this thesis proposes a new approach using statistical analysis. The effort of this thesis is to create a predictive model using historical categorical data from an aircraft manufacturer only focusing in human error causes. The use of contingency tables, natural logarithm of the odds and probability transformation is used in order to provide the predicted probabilities of each aircraft. A case of study is shown in this thesis in order to show the applied methodology. As a result, this approach is able to predict the possible outcomes of FOD by the workstation/area needed, and monthly predictions per workstation. This thesis is intended to be the starting point of statistical data analysis regarding FOD in human factors. The purpose of this thesis is to identify the areas where human error is the primary cause of FOD occurrence in order to design and implement accurate solutions. The advantages of the proposed methodology can go from the reduction of cost

  20. Multivariate analysis of risk factors of pharyngo-cutaneous fistula after surgery for larynx and hyperpharynx cancer%喉癌下咽癌术后咽瘘发生的危险因素分析

    Institute of Scientific and Technical Information of China (English)

    邱志利; 蒋晓平

    2015-01-01

    Objective To investigate the risk factors of pharyngo‐cutaneous fistula after surgery for larynx and hyperpharynx cancer .Methods 188 cases of larynx and hyperpharynx cancer from 2002 to 2012 at otorlaryngology department were collected into the research ,and the 12 kinds of risk factors of pharyngo‐cutaneous fistula after sur‐gery for larynx and hyperpharynx cancer were analized with univariate and multivariate Logistic regression analysis . Results In all these 188 cases of larynx and hyperpharynx cancer ,40 cases had pharyngo‐cutaneous fistula after op‐eration(21 .2% ) ,among 169 laryngeal carcinomas ,32 cases (18 .9% ) had pharyngo‐cutaneous fistula and 8/19 (42 .1% )of hyperpharynx carcinoma .The tumor stage ,operation method ,preopertion radiation ,diebete ,flap grafting , tumor site were the relative risk factors ,but Logistic regression analysis indicated the tumor stage ,preopertion radia‐tion ,flap grafting were the independent risk factors .Conclusion The tumor stage ,preopertion radiation ,flap grafting were significantly relative with pharyngo‐cutaneous fistula after surgery for larynx and hyperpharynx cancer .%目的:探讨喉癌下咽癌术后咽瘘发生的危险因素。方法该院2002~2012年接受喉癌下咽癌手术的188例患者,对影响喉癌下咽癌术后咽瘘发生的12种危险因素进行单因素和多因素Logistic回归分析。结果188例患者喉癌下咽癌术后发生咽瘘40例,发生率21.2%,其中喉癌169例,发生咽瘘32例,发生率18.9%,下咽癌19例,发生咽瘘8例,发生率42.1%。单因素分析表明肿瘤分期、手术方式、术前放疗、糖尿病、行皮瓣修复、肿瘤部位是咽瘘发生的相关因素,而多因素Logistic回归分析显示,手术方式、术前放疗、行皮瓣修复是术后咽瘘发生的独立危险因素。结论肿瘤分期、术前放疗、行皮瓣修复与喉癌下咽癌术后咽瘘发生密切相关。

  1. Evaluation of multivariate surveillance

    OpenAIRE

    Frisén,Marianne; Andersson, Eva; Schiöler, Linus

    2009-01-01

    Multivariate surveillance is of interest in many areas such as industrial production, bioterrorism detection, spatial surveillance, and financial transaction strategies. Some of the suggested approaches to multivariate surveillance have been multivariate counterparts to the univariate Shewhart, EWMA, and CUSUM methods. Our emphasis is on the special challenges of evaluating multivariate surveillance methods. Some new measures are suggested and the properties of several measures are demonstrat...

  2. Logistic chain modelling

    NARCIS (Netherlands)

    Slats, P.A.; Bhola, B.; Evers, J.J.M.; Dijkhuizen, G.

    1995-01-01

    Logistic chain modelling is very important in improving the overall performance of the total logistic chain. Logistic models provide support for a large range of applications, such as analysing bottlenecks, improving customer service, configuring new logistic chains and adapting existing chains to n

  3. Logistics and Exports

    OpenAIRE

    2008-01-01

    Drawing on a new and comprehensive measure of logistics quality, our gravity model suggests logistics in the exporting and partner-country can have an important impact on bilateral exports. A one standard deviation improvement in the exporter’s logistics quality, which for example would improve Gabon to the level of Guinea, would raise exports by almost 60%. Landlocked countries’ exports depend on their neighbours’ logistics, but their own logistics quality is not as important as for other co...

  4. Shipping lines and logistics

    OpenAIRE

    FREMONT, A

    2006-01-01

    For some time it has been acknowledged that logistics is a driving force that shapes the integration of the transport chain. This paper argues that while the liner shipping industry exhibits increased horizontal integration, its vertical integration remains limited. A clear distinction is drawn between freight logistics, container logistics and vessel logistics. Freight logistics is defined as part of the supply chain process, the focus of which are the goods being transported. The purpose of...

  5. Location and logistics

    OpenAIRE

    Alumura, Sibel A.; Karab, Bahar Y.; Melo, M. Teresa

    2013-01-01

    Facility location decisions play a critical role in designing logistics networks. This article provides some guidelines on how location decisions and logistics functions can be integrated into a single mathematical model to optimize the configuration of a logistics network. This will be illustrated by two generic models, one supporting the design of a forward logistics network and the other addressing the specific requirements of a reverse logistics network. Several special cases and extensio...

  6. Location and logistics

    OpenAIRE

    Alumura, Sibel A.; Karab, Bahar Y.; Melo, M. Teresa

    2013-01-01

    Facility location decisions play a critical role in designing logistics networks. This article provides some guidelines on how location decisions and logistics functions can be integrated into a single mathematical model to optimize the configuration of a logistics network. This will be illustrated by two generic models, one supporting the design of a forward logistics network and the other addressing the specific requirements of a reverse logistics network. Several special cases and extensio...

  7. An assessment of QOL and its determining factors of post menopausal women in a rural area of West Bengal, India: A multivariate analysis

    Directory of Open Access Journals (Sweden)

    Sudeshna Ray

    2012-10-01

    Full Text Available Objective: The aim was to assess QOL and its determining factors among postmenopausal women of a rural area of West- Bengal in India. Methods: This cross-sectional study was conducted among 315 postmenopausal women and the data were collected using the modified menopause quality of life questionnaire of Hilditch. (Hilditch MENQOL. Results: Out of the 315 women who have been interviewed 243 (77% had poor quality of life. Multivariate analysis revealed that poor QOL was more among those who did not live with their own children [AOR (95% C.I. 4.26 (2.1–8.6], did not undertake regular exercise, [AOR (95% C.I. 2.88 (1.38–6.03], were literate [AOR (95% C.I. 2.5 (1.13–4.8], were monetarily dependent on their children [AOR (95% C.I. 2.5 (1.32–4.88], not living under one roof with children [AOR (95% C.I. 4.26 (2.1–8.6] and had attained menopause >5 years. [AOR (95% C.I. 4.82 (2.47–9.41]. Conclusion: Different stakeholders are required to mobilize the post-menopausal women through IEC activities to cope up with the stress of the post-menopausal phase and acquire a better quality of life beyond their reproductive age.

  8. Effectiveness of daily versus non-daily granulocyte colony-stimulating factors in patients with solid tumours undergoing chemotherapy: a multivariate analysis of data from current practice

    Science.gov (United States)

    Almenar Cubells, D; Bosch Roig, C; Jiménez Orozco, E; Álvarez, R; Cuervo, JM; Díaz Fernández, N; Sánchez Heras, AB; Galán Brotons, A; Giner Marco, V; Codes M De Villena, M

    2013-01-01

    We conducted a multicentre, retrospective, observational study including patients with solid tumours (excluding breast cancer) that received granulocyte colony-stimulating factors (G-CSF) and chemotherapy. We investigated the effectiveness of daily vs. non-daily G-CSFs (pegfilgrastim) adjusting by potential confounders. The study included 391 patients (211 daily G-CSF; 180 pegfilgrastim), from whom 47.3% received primary prophylaxis (PP) (57.8% pegfilgrastim), 26.3% secondary prophylaxis (SP: initiation after cycle 1 and no reactive treatment in any cycle) (51.5% pegfilgrastim) and 26.3% reactive treatment (19.4% pegfilgrastim). Only 42.2% of patients with daily G-CSF and 46.2% with pegfilgrastim initiated prophylaxis within 72 h after chemotherapy, and only 10.5% of patients with daily G-CSF received it for ≥7 days. In the multivariate models, daily G-CSF was associated with higher risk of grade 3-4 neutropenia (G3-4N) vs. pegfilgrastim [odds ratio (OR): 1.73, 95% confidence interval (CI): 1.004–2.97]. Relative to SP, PP protected against G3-4N (OR for SP vs. PP: 6.0, 95%CI: 3.2–11.4) and febrile neutropenia (OR: 3.1, 95%CI: 1.1–8.8), and was associated to less chemotherapy dose delays and reductions (OR for relative dose intensity neutropenia and its related events in the clinical practice. PMID:23331323

  9. 老年性痴呆危险因素的Iogistic回归分析%An Analysis of Risk Factors for Senile Dementia Using Logistic Regression Model

    Institute of Scientific and Technical Information of China (English)

    吴伟; 陈骏; 周达生

    2000-01-01

    目的:探讨老年性痴呆的危险因素,为制订防范对策提供依据。方法:抽样调查南京市158名老年人健康状况及其影响因素,填写自我健康评估表、心理创伤量表、精神健康量表、幸福度量表、生活照料情况表、无望量表、老年性痴呆筛查量表等。资料用EPI和SAS系统作一元与多元分析。结果:一元分析结果显示,年龄、性别、职业、婚姻、教育、中风史6个因子与老年性痴呆发生率均有密切关系;多元分析结果显示,年龄越高,老年性痴呆发生率越高,女性发生率高于男性,体力劳动者发生率高于脑力劳动者。结论:老年性痴呆与社会心理因素有一定关系。%Objective The purpose of the investigation was to study the risk factors of senile dementia and to provide a scientific basis for making strategy of senile dementia. Methods A sampling survey of 158 old people(male 73,female 85) for their physical condition and it' s influencing factors have been done in Nanjing. The indices adopted included health appraisal of oneseff, psychological trauma,rnental health,happiness degree,ability of taking care of oneself, Bech-H table,senile dementia screening scale table. Epi Info and SAS software were used for univariate and multivariate analysis. Resuts Univariate analysis shows that the indices of age, sex, occupation, massiage, education and cerbgral haemorrhage history are closely related 1o the incidence of senile dementia. From multivariate analysis, we can see the older the age and the lower the culture level can lead to the higher incidence of senile dementia. Conclusion The senile dementia is related to social psychological factors.

  10. Analysis on Trends and Factors of Total Social Logistics Cost%社会物流总费用变化趋势与影响因素分析

    Institute of Scientific and Technical Information of China (English)

    张铁山; 郭晓薇

    2014-01-01

    Based on the bulletin of national logistics operation from 2004 to 2013,which National Development and Reform Commission combined with the National Bureau of Statistics and China Federation of Logistics and Purchasing released ,analysis on relationship between total social logistics cost ,GDP and on the relationship between social logistics costs and GDP ,total value of social logistics goods ,to reach conclusion of its characteristics of trends ,and to analyze the factors of the high cost of total social logistics,so as to find the way to reduce total social logistics cost .%文中通过对国家发展和改革委员会、国家统计局以及中国物流与采购联合会联合发布的2004-2013年全国物流运行情况通报,对社会物流总费用与GDP、社会物流总额等之间的关系进行分析,得出了其变化趋势特征,并分析出影响社会物流总费用偏高的因素,从而为降低我国社会物流总费用寻找出突破口。

  11. Managing Reverse Logistics or Reversing Logistics Management?

    NARCIS (Netherlands)

    M.P. de Brito (Marisa)

    2004-01-01

    textabstractIn the past, supply chains were busy fine-tuning the logistics from raw material to the end customer. Today an increasing flow of products is going back in the chain. Thus, companies have to manage reverse logistics as well.This thesis contributes to a better understanding of reverse

  12. Managing Reverse Logistics or Reversing Logistics Management?

    NARCIS (Netherlands)

    M.P. de Brito (Marisa)

    2004-01-01

    textabstractIn the past, supply chains were busy fine-tuning the logistics from raw material to the end customer. Today an increasing flow of products is going back in the chain. Thus, companies have to manage reverse logistics as well.This thesis contributes to a better understanding of reverse log

  13. Biostatistics Series Module 10: Brief Overview of Multivariate Methods.

    Science.gov (United States)

    Hazra, Avijit; Gogtay, Nithya

    2017-01-01

    Multivariate analysis refers to statistical techniques that simultaneously look at three or more variables in relation to the subjects under investigation with the aim of identifying or clarifying the relationships between them. These techniques have been broadly classified as dependence techniques, which explore the relationship between one or more dependent variables and their independent predictors, and interdependence techniques, that make no such distinction but treat all variables equally in a search for underlying relationships. Multiple linear regression models a situation where a single numerical dependent variable is to be predicted from multiple numerical independent variables. Logistic regression is used when the outcome variable is dichotomous in nature. The log-linear technique models count type of data and can be used to analyze cross-tabulations where more than two variables are included. Analysis of covariance is an extension of analysis of variance (ANOVA), in which an additional independent variable of interest, the covariate, is brought into the analysis. It tries to examine whether a difference persists after "controlling" for the effect of the covariate that can impact the numerical dependent variable of interest. Multivariate analysis of variance (MANOVA) is a multivariate extension of ANOVA used when multiple numerical dependent variables have to be incorporated in the analysis. Interdependence techniques are more commonly applied to psychometrics, social sciences and market research. Exploratory factor analysis and principal component analysis are related techniques that seek to extract from a larger number of metric variables, a smaller number of composite factors or components, which are linearly related to the original variables. Cluster analysis aims to identify, in a large number of cases, relatively homogeneous groups called clusters, without prior information about the groups. The calculation intensive nature of multivariate analysis

  14. Multivariate Analysis of Blood Transfusion Rates After Shoulder Arthroplasty.

    Science.gov (United States)

    King, Joseph J; Patrick, Matthew R; Schnetzer, Ryan E; Farmer, Kevin W; Struk, Aimee M; Garvan, Cyndi; Wright, Thomas W

    A retrospective review was performed of all shoulder arthroplasties with patients grouped on the basis of transfusion protocol time period. Group 1 had transfusions if postoperative hematocrit was multivariate analysis of significant bivariate factors were performed. Protocol change decreased transfusion rates from 16% (group 1, 153 arthroplasties) to 8% (group 2, 149 arthroplasties). Reverse shoulder arthroplasty (RTSA) transfusion rate decreased dramatically (from 24% to 5%). Transfusion rates after total shoulder arthroplasty (TSA) were low (4%) and after revision arthroplasty were high (21% + 27%) in both groups. Age, gender, heart disease, preoperative hematocrit, diagnosis, and estimated blood loss (EBL) were risk factors on bivariate analysis. Failed arthroplasty and fracture diagnoses carried high transfusion rates (25% + 28%). Logistic regression showed that low preoperative hematocrit, increased EBL, revision arthroplasty, and heart disease were transfusion risk factors. Protocol based on symptomatic anemia results in low transfusion rates after primary TSA and RTSA.

  15. 滕州市城区人群2型糖尿病危险因素非条件logistic回归分析%Non-conditional logistic regression analysis on risk factors of type 2 diabetes in Tengzhou urban area

    Institute of Scientific and Technical Information of China (English)

    董洪峰

    2013-01-01

    [Objective]To explore the risk factors of type 2 diabetes among residents in Tengzhou urban area, provide the basis for developing the intervention strategies and measures. [Methods] 1:1 frequency matched case-control study was conducted in 96 cases with type 2 diabetes in Tengzhou Center Peoples Hospital from May to October 2011. [Results] With the multivariate non-conditional logistic regression analysis, five factors were finally involved into the model, including family history of diabetes, waist-to-hip ratio > 0.9, hyperlipidemia, hypertension and physical exercise, which OR value was 4.31, 3.77, 3. 54, 1.65 and 0.51 respectively. [Conclusion]People with family history of diabetes, waist-to-hip ratio >0.9, hyperlipidemia and hypertension are prone to suffer from type 2 diabetes, and regular physical exercise is the protective factor.%目的 探讨滕州市城区人群2型糖尿病危险因素,为制定干预对策与措施提供依据.方法 2011年5-10月,对滕州市中心人民医院确诊的96例2型糖尿病患者进行1∶1频数匹配的病例对照研究.结果 经多因素非条件logistic回归分析,最终进入模型的5个因素有糖尿病家族史、腰臀比>0.9、高血脂症、高血压和体育锻炼,其OR值分别为4.31,3.77,3.54,1.65和0.51.结论 具有糖尿病家族史、腰臀比>0.9、高血脂、高血压的特征人群易患2型糖尿病,经常体育锻炼是降低发病的保护因素.

  16. MODELING SNAKE MICROHABITAT FROM RADIOTELEMETRY STUDIES USING POLYTOMOUS LOGISTIC REGRESSION

    Science.gov (United States)

    Multivariate analysis of snake microhabitat has historically used techniques that were derived under assumptions of normality and common covariance structure (e.g., discriminant function analysis, MANOVA). In this study, polytomous logistic regression (PLR which does not require ...

  17. 大连地区2型糖尿病危险因素的非条件Logistic回归分析%Unconditional logistic regression analysis of risk factors of type 2 diabetes mellitus in Dalian

    Institute of Scientific and Technical Information of China (English)

    高晓虹; 宋桂荣; 辛萍; 马莉; 闻红; 张萍; 高政南; 宋光华

    2005-01-01

    BACKGROUND: Diabetes mellitus is a chronic metabolic disease caused by various factors,such as environmental factor,inherited factor,etc.,and its cause isn't very clear now. This study aims to investigate the risk factors mentioned above in the onset of diabetes mellitus, and is of significance in the first and second grade of prevention of diabetes mellitus.OBJECTIVE: To investigate the risk factors of type 2 diabetes mellitus to provide evidence for the proper intervention of it.DESIGN: Cross-sectional study based on diagnosis.SETTING: Department of epidemiology in a university and department of endocrinology in a university hospital.PARTICIPANTS: The subjects were residents who have resided in town and country of Dalian for more than 5 years and were elder than 40 years old. The method of stratified cluster random sampling was carried out among natural persons who were divided into two groups according to city and country. Totally 2 500 persons were taken in total and 1 250 persons were from each group. The subjects who had been diagnosed as diabetes mellitus were included.METHODS: Questionnaire survey was employed for all the subjects, including physical examinations such as height,weight,waist girth,hip girth,blood pressure,blood glucose,etc. Patients of type 2 diabetes mellitus were taken as the case group and the normal was as the control group. The unconditional univariate and multivariate logistic regression were used.MAIN OUTCOME MEASURES: Unconditional logistic regression analysis of risk factors of type 2 diabetes mellitus with single factor analysis and multivariate analysis.RESULTS: Family history of diabetes mellitus(OR = 2.339),obesity[body mass index(BMI),OR = 1.462],systolic pressure(OR = 1.016),hyperlipidemia(OR = 1.615), age(OR = 1.043) were the major risk factors for type 2 diabetes mellitus.CONCLUSION: Family history of diabetes mellitus, increase of systolic pressure,obesity,high blood lipid and age are the risk factor for type 2 diabetes

  18. Logistic analysis of preschool children with asthma risk factors%学龄前儿童哮喘的发病危险因素Logistic分析

    Institute of Scientific and Technical Information of China (English)

    卢可斌

    2012-01-01

    OBJECTIVE To investigate the risk factors for preschool children with asthma risk factors. METHODS 300 cases of preschool children with asthma in our hospital (the observation group) and the hospital physical examination of healthy children (the control group) of 300 cases were investigated and analyzed. RESULTS The single factor risk factors for asthma included age, atopy, family history of allergy, personal history of asthma and obesity (P < 0.05). Logistic regression analysis showed that atopy, allergic family history, personal history of asthma were the major risk factors for preschool asthma occurred (P< 0.05). CONCLUSION The main risk factors for preschool asthma are atopy, allergic family history and personal history of asthma, and preventive management should be strengthened for the above factors.%目的 探讨影响学龄前儿童哮喘的发病危险因素.方法 对某院住院的学龄前儿童哮喘病人300例(观察组)和选取同期来院体检健康儿童300例(对照组)进行调查分析.结果 影响学龄前儿童哮喘的单因素危险因素变量中包括年龄、特应性体质、家族过敏史、个人哮喘史和肥胖(P<0.05).多因素Logistic回归分析结果发现特应性体质、家族过敏史、个人哮喘史是学龄前儿童哮喘发生的主要危险因素(P<0.05).结论 学龄前儿童哮喘的发病危险因素主要为特应性体质、家族过敏史和个人哮喘史,应针对以上因素加强预防管理.

  19. Influencing factor study of Henoch-Schonlein purpura in children based on the logistic regression model%基于logistic回归模型的儿童过敏性紫癜影响因素研究

    Institute of Scientific and Technical Information of China (English)

    谢彪; 曲思杨; 相静; 罗潇; 王文佶; 刘美娜

    2015-01-01

    Objective The aim of this study is to assess the associated factors of Henoch-Schonlein purpura( HSP) in Chinese children. This study has important public implications for developing strategies of preventing HSP. Methods In this hospital-based, case-control study, we recruited 353 HSP cases and 61 control participants during 2012 and 2015. We collected related information of 414 HSP in children and the control group through questionnaires. Student's t-test, Pearson Chi-square test and Wilcoxon test were used respectively to compare the difference between the case and control group; We applied logistic re-gression model to analyze the associated factors of HSP in children. Results Univariate analysis revealed that the differences in age, mother and father's level of education were significant between the case and control group. Univariate analysis also revealed that the differences in diet regularity, eating cold, fried and spicy food, meat, drinks, milk and dairy products, fruits and vege-tables between the two groups were statistically significant. Similarly, the differences in way of birth, breast-feeding, mixed feed-ing and mother contacting harmful substances before becoming pregnant between the two groups were statistically significant. After the adjustment of age, sex and mother's level of education, multivariate Logistic regression demonstrated that living in rural are-as, the enough sleep time, consumption frequencies of fruit, sweet and meat and mother's level of education were protective fac-tors for HSP in children. Multivariate Logistic regression also demonstrated that mixed feeding, feeding after chewing, illness during pregnancy, and consumption frequencies of cold, spicy food and nuts were the risky factors for HSP. Conclusion Suffi-cient sleep time, less cold and spicy food and plenty of meat and fruit can reduce the risk of HSP in children. Advocating breast-feeding, avoid feeding after chewing can also prevent children from HSP.%目的:分析

  20. Logistic regression analysis of high risk factors of preterm delivery%应用logistic回归模型分析孕妇早产的高危因素

    Institute of Scientific and Technical Information of China (English)

    王彩芳; 刘妙珍; 黄丽君

    2015-01-01

    Objective To analyze the risk factors of premature delivery. Methods The clinical data of 401 cases of preterm labor and 632 cases of mature puerperas was analyzed, and its risk factors of premature delivery were analyzed by logistic regression analysis. Results The single factor analysis showed that pregnancy induced hypertension, pregnancy complicated with diabetes, reproductive system infection, vaginal bleeding, pregnancy check-ups, premature labor, pre-mature rupture of membranes, cervical incompetence, abnormal amniotic fluid, peripheral blood lymphocyte count be-tween two groups were significantly different (χ2=195.47, 205.55, 156.09, 95.44, 100.13, 41.96, 106.61, 13.12, 2.28, 22.64,P<0.05). Logistic regression analysis showed that pregnancy induced hypertension, pregnancy complicated with di-abetes, reproductive system infection, vaginal bleeding, pregnancy check-ups, premature labor, premature rupture of membranes, peripheral blood lymphocyte count were the independent risk factors(P<0.05). Conclusion Strict observing and preventing the high risk factors of premature delivery in order to reduce the incidence of premature birth and improve maternal and child outcomes.%目的:分析孕妇早产的高危因素。方法回归性分析401例早产孕妇和同期收治的632例足月产孕妇临床资料,采用单因素分析和多因素logistic回归分析孕妇早产的高危因素。结果单因素分析显示,两组妊娠期高血压疾病、妊娠合并糖尿病、生殖系统感染、阴道出血、有产检、有早产史、胎膜早破、宫颈机能不全、羊水异常、外周血淋巴细胞计数比较,差异有统计学意义(χ2分别=195.47、205.55、156.09、95.44、100.13、41.96、106.61、13.12、2.28、22.64,P均<0.05);logistic回归分析显示,妊娠期高血压疾病、妊娠合并糖尿病、生殖系统感染、阴道出血、有产检、有早产史、胎膜早破、外周血淋巴细胞计数是孕

  1. Applied multivariate statistics with R

    CERN Document Server

    Zelterman, Daniel

    2015-01-01

    This book brings the power of multivariate statistics to graduate-level practitioners, making these analytical methods accessible without lengthy mathematical derivations. Using the open source, shareware program R, Professor Zelterman demonstrates the process and outcomes for a wide array of multivariate statistical applications. Chapters cover graphical displays, linear algebra, univariate, bivariate and multivariate normal distributions, factor methods, linear regression, discrimination and classification, clustering, time series models, and additional methods. Zelterman uses practical examples from diverse disciplines to welcome readers from a variety of academic specialties. Those with backgrounds in statistics will learn new methods while they review more familiar topics. Chapters include exercises, real data sets, and R implementations. The data are interesting, real-world topics, particularly from health and biology-related contexts. As an example of the approach, the text examines a sample from the B...

  2. Examination By Multinomial Logistic Regression Model Of The Factors Affecting The Types Of Domestic Violence Against Women A Case Of Turkey

    Directory of Open Access Journals (Sweden)

    Erkan Ari

    2015-08-01

    Full Text Available In this paper factors affecting the types of domestic violence against women was determined by multinomial logistic regression model. In this context we used the data of Research on Domestic Violence against Women in Turkey that was applied by Turkish Statistamp305cal Institute in 2008. In the study the variable of the types of domestic violence against women was used as dependent variable that has four levels. In addition twelve independent variables were used removing irrelevant variables from the data set via chi-square test of independence. After that the maximum likelihood estimates and the odds ratios of the variables of the model were obtained. Besides the validity of the model was tested by likelihood ratio test. At last comparisons were made for three categories depending on the odds ratio according to the selected reference category. In terms of odds ratios the variables of education level of woman and husbands work sector were statistically significant in only comparison one the variables of agnation with husband education level of husband frequency of seeing drunk husband and frequency of gambling of husband were statistically significant in both comparison one and three the variables of region deceived by husband common-law female for husband were statistically significant in all comparisons.

  3. Association of perceived stress with stressful life events, lifestyle and sociodemographic factors: a large-scale community-based study using logistic quantile regression.

    Science.gov (United States)

    Feizi, Awat; Aliyari, Roqayeh; Roohafza, Hamidreza

    2012-01-01

    The present paper aimed at investigating the association between perceived stress and major life events stressors in Iranian general population. In a cross-sectional large-scale community-based study, 4583 people aged 19 and older, living in Isfahan, Iran, were investigated. Logistic quantile regression was used for modeling perceived stress, measured by GHQ questionnaire, as the bounded outcome (dependent), variable, and as a function of most important stressful life events, as the predictor variables, controlling for major lifestyle and sociodemographic factors. This model provides empirical evidence of the predictors' effects heterogeneity depending on individual location on the distribution of perceived stress. The results showed that among four stressful life events, family conflicts and social problems were more correlated with level of perceived stress. Higher levels of education were negatively associated with perceived stress and its coefficients monotonically decrease beyond the 30th percentile. Also, higher levels of physical activity were associated with perception of low levels of stress. The pattern of gender's coefficient over the majority of quantiles implied that females are more affected by stressors. Also high perceived stress was associated with low or middle levels of income. The results of current research suggested that in a developing society with high prevalence of stress, interventions targeted toward promoting financial and social equalities, social skills training, and healthy lifestyle may have the potential benefits for large parts of the population, most notably female and lower educated people.

  4. Association of Perceived Stress with Stressful Life Events, Lifestyle and Sociodemographic Factors: A Large-Scale Community-Based Study Using Logistic Quantile Regression

    Directory of Open Access Journals (Sweden)

    Awat Feizi

    2012-01-01

    Full Text Available Objective. The present paper aimed at investigating the association between perceived stress and major life events stressors in Iranian general population. Methods. In a cross-sectional large-scale community-based study, 4583 people aged 19 and older, living in Isfahan, Iran, were investigated. Logistic quantile regression was used for modeling perceived stress, measured by GHQ questionnaire, as the bounded outcome (dependent, variable, and as a function of most important stressful life events, as the predictor variables, controlling for major lifestyle and sociodemographic factors. This model provides empirical evidence of the predictors’ effects heterogeneity depending on individual location on the distribution of perceived stress. Results. The results showed that among four stressful life events, family conflicts and social problems were more correlated with level of perceived stress. Higher levels of education were negatively associated with perceived stress and its coefficients monotonically decrease beyond the 30th percentile. Also, higher levels of physical activity were associated with perception of low levels of stress. The pattern of gender’s coefficient over the majority of quantiles implied that females are more affected by stressors. Also high perceived stress was associated with low or middle levels of income. Conclusions. The results of current research suggested that in a developing society with high prevalence of stress, interventions targeted toward promoting financial and social equalities, social skills training, and healthy lifestyle may have the potential benefits for large parts of the population, most notably female and lower educated people.

  5. [Logistic regression analysis of the risk factors for difficult airway and the cut-off value of height-to-thyromental distance ratio].

    Science.gov (United States)

    Jin, Hao; Chen, Ping

    2015-08-01

    To analyze the risk factors for difficult airway in laryngoscopy and mask ventilation. A total of 300 patients receiving general anesthesia with tracheal intubation were examined preoperatively for height, thyromental and sternomental distance (TMD), range of neck movement, inter-incisor distance, and modified Mallampati class. Intubation Difficult Score was used to identify a difficult laryngoscopy. Difficult airway was defined as either difficult laryngoscopy or difficult mask ventilation. The association between the airway characteristics and difficult airway was analyzed by logistic regression analysis, and the cut-off values for the height-to-TMD ratio was determined by the ROC curve. Eight airway characteristics were identified to contribute to a difficult airway, including (OR [95%CI]) the height-to-TMD ratio (3.58[1.95-8.46]), modified Mallampati class (3.34 [1.82-7.14]), BMI (3.07 [1.64-6.69]), history of a previous difficult airway (2.79 [1.28-5.25]), a thick neck (2.15 [1.04-4.37]), range of neck movement (1.98 [0.96-3.89]), sternomental and angulus mandibulae distance (1.46 [0.67-3.04]), and inter-incisor distance (1.01 [0.49-2.54]). The optimal cut-off value for the height-to-TMD ratio was 22.8 for predicting a difficult airway.

  6. A Logistic Regression Model for Predicting Axillary Lymph Node Metastases in Early Breast Carcinoma Patients

    Directory of Open Access Journals (Sweden)

    Jiaqing Zhang

    2012-07-01

    Full Text Available Nodal staging in breast cancer is a key predictor of prognosis. This paper presents the results of potential clinicopathological predictors of axillary lymph node involvement and develops an efficient prediction model to assist in predicting axillary lymph node metastases. Seventy patients with primary early breast cancer who underwent axillary dissection were evaluated. Univariate and multivariate logistic regression were performed to evaluate the association between clinicopathological factors and lymph node metastatic status. A logistic regression predictive model was built from 50 randomly selected patients; the model was also applied to the remaining 20 patients to assess its validity. Univariate analysis showed a significant relationship between lymph node involvement and absence of nm-23 (p = 0.010 and Kiss-1 (p = 0.001 expression. Absence of Kiss-1 remained significantly associated with positive axillary node status in the multivariate analysis (p = 0.018. Seven clinicopathological factors were involved in the multivariate logistic regression model: menopausal status, tumor size, ER, PR, HER2, nm-23 and Kiss-1. The model was accurate and discriminating, with an area under the receiver operating characteristic curve of 0.702 when applied to the validation group. Moreover, there is a need discover more specific candidate proteins and molecular biology tools to select more variables which should improve predictive accuracy.

  7. SIMULATION OF LOGISTICS PROCESSES

    OpenAIRE

    Yu. Taranenko; Fedorenko, I.

    2016-01-01

    The article deals with the theoretical basis of the simulation. The study shows the simulation of logistic processes in industrial countries is an integral part of many economic projects aimed at the creation or improvement of logistics systems. The paper was used model Beer Game for management of logistics processes in the enterprise. The simulation model implements in AnyLogic package. AnyLogic product allows us to consider the logistics processes as an integrated system, which allows reach...

  8. Reverse logistics - a framework

    OpenAIRE

    Brito, Marisa; Dekker, Rommert

    2002-01-01

    textabstractIn this paper we define and compare Reverse Logistics definitions. We start by giving an understanding framework of Reverse Logistics: the why-what-how. By this means, we put in context the driving forces for Reverse Logistics, a typology of return reasons, a classification of products, processes and actors. In addition we provide a decision framework for Reverse Logistics and we present it according to long, medium and short term decisions, i.e. strategic-tactic-operational decis...

  9. Multivariable analysis of clinical influence factors on liver enhancement of Gd-EOB-DTPA-enhanced 3T MRI; Multivariable Analyse klinischer Einflussfaktoren auf die Signalintensitaet bei Gd-EOB-DTPA 3T-MRT der Leber

    Energy Technology Data Exchange (ETDEWEB)

    Verloh, N.; Haimerl, M.; Stroszczynski, C.; Fellner, C.; Wiggermann, P. [University Hospital Regensburg (Germany). Dept. of Radiology; Zeman, F. [University Hospital Regensburg (Germany). Center for Clinical Trials; Teufel, A. [University Hospital Regensburg (Germany). Dept. of Gastroenterology; Lang, S. [University Hospital Regensburg (Germany). Dept. of Surgery

    2015-01-15

    The purpose of this study was to identify clinical factors influencing Gd-EOB-DTPA liver uptake in patients with healthy liver parenchyma. A total of 124 patients underwent contrast-enhanced MRI with a hepatocyte-specific contrast agent at 3T. T1-weighted volume interpolated breath-hold examination (VIBE) sequences with fat suppression were acquired before and 20 minutes after contrast injection. The relative enhancement (RE) between plain and contrast-enhanced signal intensity was calculated. Simple and multiple linear regression analyses were performed to evaluate clinical factors influencing the relative enhancement. Patients were subdivided into three groups according to their relative liver enhancement (HRE, RE ≥ 100 %; MRE, 100 % > RE > 50 %; NRE, RE ≤ 50 %) and were analyzed according to the relevant risk factors. Simple regression analyses revealed patient age, transaminases (AST, ALT, GGT), liver, spleen and delta-liver volume (the difference between the volumetrically measured liver volume and the estimated liver volume based on body weight) as significant factors influencing relative enhancement. In the multiple analysis the transaminase AST, spleen and delta liver volume remained significant factors influencing relative enhancement. Delta liver volume showed a significant difference between all analyzed groups. Liver enhancement in the hepatobiliary phase depends on a variety of factors. Body weight-adapted administration of Gd-EOB-DTPA may lead to inadequate liver enhancement after 20 minutes especially when the actual liver volume differs from the expected volume.

  10. 变应性鼻炎相关危险因素的Logistic回归分析%Logistic regression analysis of related risk factors in allergic rhinitis

    Institute of Scientific and Technical Information of China (English)

    冯婷; 黄世铮; 鲁航

    2015-01-01

    目的:探讨变应性鼻炎致病的相关因素。方法通过系统抽样方法选取200例变应性鼻炎患者与200例健康体检者,详细记录每例试验者的体育锻炼、饮食习惯、有变应性鼻炎家族史、吸烟史、工作环境粉尘情况、营养状态、晾晒被褥、花粉过敏、每日睡眠、尘螨过敏、养宠物史、食物过敏、开窗通风等情况,采用Logistic回归分析变应性鼻炎致病的相关因素。结果体育锻炼、营养状况、每日睡眠、饮食习惯与变应性鼻炎无相关性,晾晒被褥、开窗通风及空调开放为变应性鼻炎的保护因素,有变应性鼻炎家族史、吸烟史、花粉过敏、尘螨过敏、养宠物史、食物过敏为变应性鼻炎的危险因素。结论有变应性鼻炎家族史、吸烟史、花粉过敏、尘螨过敏、养宠物史、食物过敏是变应性鼻炎的危险因素。%Objective To investigate the factors related to allergic rhinitis disease. Method Chose 200 cases of allergic rhinitis and 200 cases of healthy people through systematic sampling method, detail recorded each case with the physical exercise, diet habit, family history, smoking history, work environment of dust, status, airing quilts, pollen allergy, daily sleep, dust mite allergy history, pet history, food allergies, ventilation windows, used Logistic regression analysis of factors related to allergic rhinitis. Result Physical exercise, nutrition, sleep, diet were not associated with allergic rhinitis, airing quilts, window ventilation and air conditioning open indicated that were protective factors, the rest of family history, smoking history of allergic rhinitis, allergic to pollen, dust mites allergic, pet history and food allergies were risk factors for allergic rhinitis. Conclusion Family history, smoking history, pollen allergy, dust mite allergy, pet history, food allergies are the risk factors of allergic rhinitis.

  11. Logistic Regression Analysis of Related Factors on Children With Tic Disorders%儿童抽动障碍Logistic相关因素分析

    Institute of Scientific and Technical Information of China (English)

    黄晓玲; 刘长云

    2011-01-01

    Objective To investigate the related factors on children with tic disorders (TD) and provide the clinical evidence for therapy. Methods This was a prospective observational study with institutional ethics approval and written maternal consent. From January to December 2009, a total of 122 children with TD were selected as study group, while 106 cases without TD were selected as control group. There were no significant differences in gender ratio, age and etc between two groups(P>0. 05). All the children were investigated with "Related Factors on Children With Tic Disorders Logistic Scale" which was designed by Weifang Medical College. The risk factors of TD were analysed by class two Logistic regression. Results Among 15 single factor, such as family discipline harsh, angry / personality sensitive to partial addicted to diet, family history of TD, history of recurrent respiratory tract infections, attention deficit hyperactivity disorder (ADHD) had significant differences between two groups(P0. 05). According to class two Logistic regression analysis classification of 15 single factor, factors of family discipline harsh, angry / personality sensitive to partial addicted to diet, family history of TD, history of recurrent respiratory tract infections, ADHD were closely related to TD incidence (P0. 05). Conclusion In order to treat and prevent TD, factors such as family environment, balanced diet, testing children character, enhance children s regulation of the immune resistance and so on should be taken into account.%目的 探讨儿童抽动障碍(TD)发病的相关因素,为临床防治TD提供依据.方法 选择2009年1月至12月在淄博市妇幼保健院儿童保健门诊以抽动为主诉就诊并确诊为TD的患儿纳入研究组(n=122).对照组(n=106)为同期在本院就诊,排除TD病史儿童(本研究遵循的程序符合本院人体试验委员会制定的伦理学标准,得到该委员会批准,分组征得受试对象监护人的知情同意,并

  12. Operationa1 Logistics 2010.

    Science.gov (United States)

    2007-11-02

    Joint Vision 2010 and Focused Logistics as the start point to describe how military logistics might look in 2010. Although changes are occurring at...Although many initiatives are currently underway which will transform military logistics , this paper attempts to tie the many emerging concepts and

  13. Reverse logistics - a framework

    NARCIS (Netherlands)

    M.P. de Brito (Marisa); R. Dekker (Rommert)

    2002-01-01

    textabstractIn this paper we define and compare Reverse Logistics definitions. We start by giving an understanding framework of Reverse Logistics: the why-what-how. By this means, we put in context the driving forces for Reverse Logistics, a typology of return reasons, a classification of product

  14. Logistic regression analysis on risk factors for vascular dementia following cerebral infarction in 403 patients from Chongqing City Hospital and family follow-up studies

    Institute of Scientific and Technical Information of China (English)

    Hong Yang; Jingcheng Li; Huadong Zhou

    2007-01-01

    deficit scoring was carried out with the National Institutes of Health Stroke Scale.⑤Chi-square test was used for categorical variable, and t test for quantitative variable between dementia group and non-dementia group. Dementia-related factors were performed multiple-factor Logistic regression model analysis. MAIN OUTCOME MEASURES: Incidence of dementia and dementia-related risk factors of patients. RESULTS: Altogether 546 patients with stroke were involved in this study, 403 of them participated in the final analysis, and 143 dropped out. A total of 342 were followed-up in the hospital and 61 at home. At 3 months after cerebral infarction, vascular dementia occurred in 87 (21.6%) of 403 patients. The main risk factors were age (OR 1.179; 95%CI 1.130 - 1.230), low education level (OR 1.806; 95%CI 1.024 - 3.186), daily alcohol drinking (OR 3.447; 95%CI 1.591 - 7.468), stroke history (OR 2.531; 95%CI 1.419-4.512), atrial fibrilation(OR 3.475; 95%CI 1.712 - 7.057), dysphonia (OR 5.873; 95%CI 2.620 - 13.163) and left carotid artery infarction (OR 1.975; 95%CI 1.152 - 3.388).CONCLUSION: The incidence of vascular dementia is determined by synthetic action of multiple risk factors. Dysphonia is the most important influencing factor.

  15. Key aspects of logistics services audit

    Directory of Open Access Journals (Sweden)

    N.V. Gaidabrus

    2015-06-01

    Full Text Available The aim of the article. Aim of the article is to characterize the logistics audit essence, to form main stages of the logistic service audit and to observe informational providing of these stages, to characterize behavior model concerning logistic service factors analysis. The results of the analysis. The given work deals with logistic audit value and its essence, which is determined as representing sources of the spare logistic expenses and investigates plan for further actions concerning development or withdrawal of the logistic service components in order to find optimal ratio between its level and proper expenses. Also the main stages of logistic service audit are provided as following: collection and processing information, which is necessary to calculate logistic service estimation factors; estimation the logistic service real state; creation factors positions trimeric matrix for logistic service estimation; determination the logistic service factors, requiring fast development or immediate leaving; searching optimal level of expenses for logistic service considering its desirable level. Also informational support of these stages is provided in the article, which includes internal reporting of the enterprise: financial and statistic reporting data; personal observation and market study data, analytics, results of the experts’ evaluations; factors of the logistic service and costs for their support or improvement; factors positions trimeric matrix for logistic service estimation. Also author characterizes in details behavior model concerning logistic service factors analysis, which includes trimeric decision making matrix. Having analyzed the matrix, one may define which elements of the logistic service are necessary to move, develop or support immediately or gradually. All factors on the matrix are located by three axes: logistic service element of the estimation factor weight (it takes the value 0-1; estimation of the logistic service

  16. Logistics potentials in business competitive advantage creation

    Directory of Open Access Journals (Sweden)

    Rafał Matwiejczuk

    2013-12-01

    Full Text Available Background: Companies constantly search for ways to achieve and sustain long-term competitive advantage. Among the factors influencing the competitive advantage creation there are so called logistics potentials, which constitute a component part of a business strategic potentials. Logistics resources, logistics capabilities and logistics competences are the main components of the logistics potentials structure and hierarchy. Methods: In order to recognize the logistics potentials which determine the competitive advantage creation one may use the assumptions and elements of contemporary management concepts, including strategic management. In particular the article deals with Resource-Based View (RBV, Dynamic Capabilities Concept (DCC and - first of all - Competence-Based Management (CBM. Results and conclusions: Several significant research projects have presented a wide scope and a large number of possibilities of logistics potentials (and logistics competences in particular influence on business competitive advantage creation. The article briefly presents the research results conducted by: (1 Michigan State University (USA, (2 European Logistics Association (ELA in cooperation with A.T. Kearney, (3 Computer Sciences Corporation and (4 Capgemini. The research results have pointed out to differentiated but at the same distinctive symptoms of logistics competences influence on competitive advantage creation. The article also refers to the results of the research carried out by the Chair of Logistics & Marketing at Opole University (Poland in companies operating in Poland. The research has been mainly dealing with the significance of logistics competences in competitive advantage creation.

  17. Risk factors for non-alcoholic fatty liver disease:a multivariate analysis%非酒精性脂肪性肝病发病的多因素分析

    Institute of Scientific and Technical Information of China (English)

    庞雪芹; 陈卫昌; 冯璜; 田文妍

    2014-01-01

    Objective To investigate the risk factors for non-alcoholic fatty liver disease (NAFLD)and to provide a basis for the preven-tion of NAFLD.Methods A total of 190 patients with NAFLD who visited the First Affiliated Hospital of Soochow University from January 201 1 to January 2013 were included in the study.The investigated factors included sex,age,height,weight,dietary habit,smoking and al-cohol consumption,educational level,occupation,intensity and duration of physical exercise,bedtime,previous history,and family histo-ry.Univariate and multivariate analyses were performed using SPSS 18.0 to determine the risk factors for NAFLD.Results The univariate analysis showed that sex,age,dietary habit,occupation,body mass index (BMI),and educational level were associated with NAFLD (P<0.05).The logistic regression analysis showed that the risk factors for NAFLD were sex (OR=5.692,P=0.029),age (OR=0.423,P=0.041),occupation (OR=0.698,P=0.008),BMI (OR=3.939,P=0.003),educational level (OR=5.463,P=0.030),and dieta-ry habit (OR=9.235,P=0.039).Conclusion NAFLD may be related to many factors,and corresponding preventive measures may re-duce the development of NAFLD.%目的:探讨影响非酒精性脂肪性肝病(NAFLD)的相关高危因素,为预防提供依据。方法对苏州大学附属第一医院自2011年1月至2013年1月就诊的190例NAFLD患者进行相应调查,内容包括:性别、年龄、身高、体质量、饮食习惯、烟酒嗜好、文化程度、职业、体育锻炼强度及时间、就寝时间、既往史、家族史等。应用统计学软件SPSS18.0对其进行单因素分析和非条件Logistic回归分析。结果单因素分析显示性别、年龄、饮食习惯、职业、体质量指数、学历与NAFLD的发生有相关性(P<0.05)。Logistic回归显示性别(OR=5.692,P=0.029)、年龄(OR=0.423,P=0.041)、职业(OR=0.698,P=0.008)、体质量指数(OR=3.939,P=0.003

  18. Logistic regression analysis of the influencing factors of psychological problems faced by college students%大学生心理障碍影响因素的Logistic回归分析

    Institute of Scientific and Technical Information of China (English)

    钟文娟; 黄万琪; 张银友; 贺尊

    2007-01-01

    all subjects in both experiment groups, there were 173 males and 262 females with an average age of 19.2 years. METHODS: ① The subjects in the two experiment groups were investigated of the psychological health by SCL-90 as well as the personality characteristics and Eysenck Personality Questionnaire (EPQ) (For Adult). The EPQ statistic software designed by the Institute for Juvenile and Children, Tongji Medical College of Huazhong University of Science and Technology was adopted to acquire the E score (introversion, extroversion), N score (nervousness), P score (psychoticism), L score (conceal) and quantity form quadrant of E-N coordinate picture, so as to define the tendencies of characters. ② The psychological problem was considered to be the dependent variable, while all relevant factors (The influencing factors of psychological problem included the understanding from parents, relationship with family members, desire for learning, personality characteristics, over-high P score, over-high/low E score, over-high/low N score) were taken as the independent variable. Single-factor Logistic regression analysis was conducted at 1:2. ③ Based on 1:2 single-factor Logistic regression analysis, the variances were selected from factors of P < 0.01 together with the Logistic regression models of multifactor at 1:2 by stepwise regression method.MAIN OUTCOME MEASURES: ① Comparison in the SCL-90 score between the psychological problem group and the normai control group. ② Single-factor and multivariate analysis of the relevant factors of psychological problems. RESULTS: A total of 435 enrolled students were involved in the analysis of results. ① The average score of somatization, compulsion, interpersonal sensitivity, depression, anxiety, hostility, phobia, paranoid and schizophrenia in students of the psychological problem group was higher than that in the normal control group (t=-13.39, 29.64, 27.09, 26.04, 19.52, 18.13, 14.15, 18.61, 22.41, P< 0.01). ② Nine

  19. The strength of the multivariable associations of major risk factors predicting coronary heart disease mortality is homogeneous across different areas of the Seven Countries Study during 50-year follow-up.

    Science.gov (United States)

    Menotti, Alessandro; Puddu, Paolo Emilio; Adachi, Hisashi; Kafatos, Anthony; Tolonen, Hanna; Kromhout, Daan

    2017-08-08

    To compare the magnitude of multivariable coefficients and hazard ratios of four cardiovascular risk factors across five worldwide regions of the Seven Countries Study in predicting 50-year coronary deaths. A total of 13 cohorts of middle-aged men at entry (40-59 years old) were enrolled in the mid-1900s from five relatively homogeneous groups of cohorts (areas): USA, Finland and Zutphen - the Netherlands, Italy and Greece, Serbia, Japan for a total of 10,368 middle-aged men. The major risk factors measured at baseline were age, number of cigarettes smoked, systolic blood pressure and serum cholesterol. Cox proportional hazards models were solved for 50-year (45 years for Serbia) deaths from coronary heart disease (CHD), and the multivariable coefficients were compared for heterogeneity. The highest levels of risk factors and CHD death rates were found in Finland and Zutphen - the Netherlands and the lowest in Japan. All four risk factors were predictive for long-term CHD mortality in all regions, except serum cholesterol in Japan where the mean levels and CHD events were lowest. Tests of heterogeneity of coefficients for single risk factors in predicting CHD mortality were non-significant across the five areas. The same analyses for the first 25 years of follow-up produced similar findings. The strength of the multivariable associations of four major traditional CHD risk factors with long-term CHD mortality appears to be relatively homogeneous across areas, pending needed further evidence.

  20. KSC ISS Logistics Support

    Science.gov (United States)

    Tellado, Joseph

    2014-01-01

    The presentation contains a status of KSC ISS Logistics Operations. It basically presents current top level ISS Logistics tasks being conducted at KSC, current International Partner activities, hardware processing flow focussing on late Stow operations, list of KSC Logistics POC's, and a backup list of Logistics launch site services. This presentation is being given at the annual International Space Station (ISS) Multi-lateral Logistics Maintenance Control Panel meeting to be held in Turin, Italy during the week of May 13-16. The presentatiuon content doesn't contain any potential lessons learned.

  1. Total Logistic Plant Solutions

    Directory of Open Access Journals (Sweden)

    Dusan Dorcak

    2016-02-01

    Full Text Available The Total Logistics Plant Solutions, plant logistics system - TLPS, based on the philosophy of advanced control processes enables complex coordination of business processes and flows and the management and scheduling of production in the appropriate production plans and planning periods. Main attributes of TLPS is to create a comprehensive, multi-level, enterprise logistics information system, with a certain degree of intelligence, which accepts the latest science and research results in the field of production technology and logistics. Logistic model of company understands as a system of mutually transforming flows of materials, energy, information, finance, which is realized by chain activities and operations

  2. Logistics Management: New trends in the Reverse Logistics

    Science.gov (United States)

    Antonyová, A.; Antony, P.; Soewito, B.

    2016-04-01

    Present level and quality of the environment are directly dependent on our access to natural resources, as well as their sustainability. In particular production activities and phenomena associated with it have a direct impact on the future of our planet. Recycling process, which in large enterprises often becomes an important and integral part of the production program, is usually in small and medium-sized enterprises problematic. We can specify a few factors, which have direct impact on the development and successful application of the effective reverse logistics system. Find the ways to economically acceptable model of reverse logistics, focusing on converting waste materials for renewable energy, is the task in progress.

  3. Switching Between Multivariable Controllers

    DEFF Research Database (Denmark)

    Niemann, H.; Stoustrup, Jakob; Abrahamsen, R.B.

    2004-01-01

    A concept for implementation of multivariable controllers is presented in this paper. The concept is based on the Youla-Jabr-Bongiorno-Kucera (YJBK) parameterization of all stabilizing controllers. By using this architecture for implementation of multivariable controllers, it is shown how...

  4. Multivariate GARCH models

    DEFF Research Database (Denmark)

    Silvennoinen, Annastiina; Teräsvirta, Timo

    This article contains a review of multivariate GARCH models. Most common GARCH models are presented and their properties considered. This also includes nonparametric and semiparametric models. Existing specification and misspecification tests are discussed. Finally, there is an empirical example...... in which several multivariate GARCH models are fitted to the same data set and the results compared....

  5. Multivariate irregular sampling theorem

    Institute of Scientific and Technical Information of China (English)

    2009-01-01

    In this paper,we prove a Marcinkiewicz-Zygmund type inequality for multivariate entire functions of exponential type with non-equidistant spaced sampling points. And from this result,we establish a multivariate irregular Whittaker-Kotelnikov-Shannon type sampling theorem.

  6. Multivariate GARCH models

    DEFF Research Database (Denmark)

    Silvennoinen, Annastiina; Teräsvirta, Timo

    This article contains a review of multivariate GARCH models. Most common GARCH models are presented and their properties considered. This also includes nonparametric and semiparametric models. Existing specification and misspecification tests are discussed. Finally, there is an empirical example...... in which several multivariate GARCH models are fitted to the same data set and the results compared....

  7. Multivariate irregular sampling theorem

    Institute of Scientific and Technical Information of China (English)

    CHEN GuangGui; FANG GenSun

    2009-01-01

    In this paper, we prove a Marcinkiewicz-Zygmund type inequality for multivariate entire functions of exponential type with non-equidistant spaced sampling points. And from this result, we establish a multivariate irregular Whittaker-Kotelnikov-Shannon type sampling theorem.

  8. Switching Between Multivariable Controllers

    DEFF Research Database (Denmark)

    Niemann, Hans Henrik; Stoustrup, Jakob; Abrahamsen, Rune

    2004-01-01

    it is possible to smoothly switch between multivariable controllers with guaranteed closed-loop stability. This includes also the case where one or more controllers are unstable. The concept for smooth online changes of multivariable controllers based on the YJBK architecture can also handle the start up...

  9. Assessment of socio-economic potential of regions for placement of the logistic infrastructure objects

    Directory of Open Access Journals (Sweden)

    Aleksandr Nelevich Rakhmangulov

    2014-06-01

    Full Text Available Currently, at the regional markets, there is a disproportion between the growing demand for transportation and logistics services and the availability of facilities needed for their implementation, which is because the high logistics costs and does not meet the strategic objectives of the country to create a common economic space. The article describes the system of market factors that have the most significant influence on the distribution of logistics facilities. Study and evaluation of potential changes in the region of logistics facility disposition are proposed to perform using simulation techniques and statistical data analysis. The article presents the engineered multivariate statistical models that control the kind and effect of correlation between socio-economic development factors of regions, as well as a simulation model, which allows to assess the dynamics of these factors and predict demand for logistics infrastructure facilities. The choice of region (subject dislocation of the logistics center is proposed to realize by the developed technique based on the calculation of the integrated index that takes into account differences in the level of socio-economic and infrastructural development of the regions. This technique in conjunction with a simulation model is applicable to a variety of administrative and territorial levels (region, city and allows to take into account both the current demand in the logistics infrastructure and demand dynamics. The technique given in the article can be used to assess the level of attractiveness of the Russian Federation in the development of public and private investment projects for the development of logistics infrastructure

  10. 中青年冠心病发病相关因素Logistic分析%The Related Factors Logistic Analysis of Young Coronary Heart Disease

    Institute of Scientific and Technical Information of China (English)

    裴勇

    2015-01-01

    Objective:To explore the related factors Logistic analysis of young coronary heart disease. Method:104 Young coronary heart disease patients who were admitted in our hospital internal medicine department were selected as the CHD group. 164 cases non-coronary heart disease were selected in our hospital healthy department as non-CHD group. The related risk factors were analyzed by univariate analysis and binary logistic analysis.Result:Univariateanalysis showed that proportion of hypertension,the use of blood pressure lowering drugs,diabetes,oral hypoglycemic agents,TG increased,TC increased,LDL-C increased,HDL-C was low,UA increased,smoking,drinking,and family history of coronary heart disease proportion in the CHD group were significantly higher than the non CHD group, the differences were statistically significant(P<0.05).The binary logistic regression analysis showed that hypertension (OR=11.112,95%CI:2.124-24.709),diabetes(OR=3.155,95%CI:0.929-14.207),TG increased(OR=7.249, 95%CI:1.681-20.540),TC increased(OR=5.755,95%CI:1.328-17.805),LDL increased(OR=5.540,95%CI:1.221-17.709),HDL lower(OR=7.478,95%CI:1.702-22.160),history of smoking(OR=4.536,95%CI:1.286-15.918),drinking history(OR=4.442,95%CI:1.270-15.692)and hyperuricemia(HUA)(OR=2.855,95%CI:0.740-10.981)were the risk factors for young CHD. Conclusion:The risk factors of young coronary heart disease are high blood pressure,diabetes,TG increased,TC increased,LDL increased,HDL decreased,smoking history,alcohol history and HUA.%目的:对中青年冠心病发病相关因素进行Logistic分析。方法:将本院内科收治的中青年冠心病患者104例作为冠心病组,另选择同期在本院进行健康体检的164例非冠心患者群作为非冠心病组,对相关危险因素进行单因素分析及二元Logistic分析。结果:单因素分析表明,冠心病组患者的高血压比例、使用降血压药物、糖尿病、口服降糖药、TG增高、TC增高、LDL-C增

  11. Logistic Regression Analysis of the Risk Factors of Ectopic Pregnancy%异位妊娠危险因素Logistic回归分析

    Institute of Scientific and Technical Information of China (English)

    陈小华

    2014-01-01

    目的:研究异位妊娠发生的危险因素,为提高其防治水平提供科学有力证据。方法采用Logisitic回归分析法,选取2011年3月-2013年10月在该院妇产科住院治疗140例异位妊娠患者作为研究对象,进行异位妊娠相关因素的多元回归分析。结果流产史、异位妊娠史、盆腔感染史和宫内节育器是异位妊娠发生的显著危险因素,其优势比(odds ratio,OR)及95.0%可信区间(confidence interval,CI)分别为OR=3.79,95.0% CI:2.23~6.42、OR=6.98,95.0% CI:2.64~15.53、OR=4.21,95.0%CI:2.43~7.15和OR=2.19,95.0%CI:1.21~3.98。结论加强生殖健康教育、减少非意愿妊娠和预防盆腔感染,可降低异位妊娠的风险。%Objective To study the risk factors related to ectopic pregnancy in order to provide a scientific evidence for improving the level of prevention and treatment. Methods 140 cases of patients with ectopic pregnancy hospitalized in the Department of Obstetrics and Gynecology of our hospital from March, 2011 to October, 2013 were selected as the subjects. And logistic regression analysis method was used to analyze the factors related to ectopic pregnancy. Results The main risk factors related to ectopic pregnancy were history of abortion with the odds ratio (OR) =3.79, 95% confidence interval (CI):2.23-6.42; and history of ectopic pregnancy with OR=6.98; 95% CI: 2.64-15.53; history of pelvic infection with OR=4.21, 95% CI:2.43-7.15;the intrauterine de-vice with OR=2.19, 95%CI:1.21-3.98. Conclusion Strengthening the reproductive health education, reducing the unwanted preg-nancy and preventing pelvic infection, can reduce the risk of ectopic pregnancy.

  12. Analysis of the influence factors and clinical indices for halitosis in end-stage renal disease patients through multiple logistic regression%终末期肾脏病患者鼻测口臭相关影响因素的Logistic回归分析

    Institute of Scientific and Technical Information of China (English)

    赵颖; 孙玉华; 冯锦红; 韩建国

    2015-01-01

    目的:探讨终末期肾脏病(ESRD)患者口臭与相关影响因素的关系。方法分别用茚三酮分光光度法和鼻测法检测ESRD患者口气中氨的浓度值和感官口气值(OS),并统计性别、年龄、学历、透析时间、抽烟史、氨值、肌酐、尿素氮、唾液pH值、舌苔面积、舌苔厚度等因素,分析鼻测法与这些检测指标之间的Logistic回归关系。结果在α=0.05水平,单因素Logistic回归分析显示氨值、尿素氮、舌苔厚度、唾液pH值等4个因素为ESRD患者口臭的危险因素,进一步作多因素Logistic回归分析表明,氨值是ESRD患者口臭最可能的危险因素。结论 SRD患者体内不能完全代谢的氨是产生氨性口臭最可能的危险因素。%Objective To study the relationship between the influence factors and halitosis in end-stage renal disease (ESRD) patients. Methods Organoleptic scores (OS) and concentration value of ammonia were measured independently by organoleptic assessment and ninhydrin spectrophotometry . Factors such as gender, age, education, duration of dialysis, smoking history, ammonia, urea nitrogen, creatinine, salivary pH, area and thickness of tongue coating were statistically analyzed. The Logistic regression relationship of oroganolepticscores and other clinical indices was studied . Results At the level of α=0.05, the single factor Logistic regression analysis showed that four factors including the ammonia, urea nitrogen, the thickness of tongue coating and salivary pH were the risk factors of halitosis in patients with end stage renal disease . Further multivariate Logistic regression analysis showed that ammonia was the most possible risk factor of halitosis in patients with end stage renal disease . Conclusion Ammonia not completely metabolized in the body of patients with end stage renal disease is the most possible risk factor of halitosis in these patients .

  13. Logistic model for determining factors associated with HIV infection among blood donor candidates at the Fundação HEMOPE.

    Science.gov (United States)

    Queiroz, Niedja Maristone Barreto; Sampaio, Divaldo de Almeida; Santos, Eufrázio de Souza; Bezerra, Ana Cristina de Souza

    2012-01-01

    To determine factors associated with HIV infection in blood donor candidates in Recife, Brazil. A transversal study was performed of 106,203 blood donor candidates found eligible by the routine clinical screening process in the blood bank in Recife of the Fundação de Hematologia e Hemoterapia de Pernambuco (HEMOPE) in the period from January 1998 to November 2003. Additional indirect immune and western blot confirmation tests for HIV infection were performed and the candidates were classified as HIV positive or negative. The Chi-squared test and stepwise multiple logistic regression were conducted to examine any association between HIV infection and age, gender, place of residence, schooling, number of donations and serological tests for core hepatitis B antigen virus (anti-HBc), the hepatitis C antivirus (anti-HCV), human T-type antivirus lymph cells (anti-HTLV 1 and 2), serological tests for syphilis (VDRL) and the hepatitis B virus surface antigen (HBsAg). In the observed sample, 0.204% of blood donor candidates were found to be HIV positive. Among the studied variables, the age, education level, residency, donation type, and serologic status for anti-HBc and VDRL tests were found to be associated with HIV infection. The younger, spontaneous donor candidates living in the Recife metropolitan area with a low level of education and positive for anti-HBc and VDRL have an higher risk of HIV infection than the other candidates. Data such as these are useful to understand the dynamics of infection and to guide healthcare policies.

  14. Logistic model for determining factors associated with HIV infection among blood donor candidates at the Fundação HEMOPE

    Science.gov (United States)

    Queiroz, Niedja Maristone Barreto; Sampaio, Divaldo de Almeida; Santos, Eufrázio de Souza; Bezerra, Ana Cristina de Souza

    2012-01-01

    Objective To determine factors associated with HIV infection in blood donor candidates in Recife, Brazil. Methods A transversal study was performed of 106,203 blood donor candidates found eligible by the routine clinical screening process in the blood bank in Recife of the Fundação de Hematologia e Hemoterapia de Pernambuco (HEMOPE) in the period from January 1998 to November 2003. Additional indirect immune and western blot confirmation tests for HIV infection were performed and the candidates were classified as HIV positive or negative. The Chi-squared test and stepwise multiple logistic regression were conducted to examine any association between HIV infection and age, gender, place of residence, schooling, number of donations and serological tests for core hepatitis B antigen virus (anti-HBc), the hepatitis C antivirus (anti-HCV), human T-type antivirus lymph cells (anti-HTLV 1 and 2), serological tests for syphilis (VDRL) and the hepatitis B virus surface antigen (HBsAg). Results In the observed sample, 0.204% of blood donor candidates were found to be HIV positive. Among the studied variables, the age, education level, residency, donation type, and serologic status for anti-HBc and VDRL tests were found to be associated with HIV infection. Conclusions The younger, spontaneous donor candidates living in the Recife metropolitan area with a low level of education and positive for anti-HBc and VDRL have an higher risk of HIV infection than the other candidates. Data such as these are useful to understand the dynamics of infection and to guide healthcare policies. PMID:23049423

  15. Sparse Linear Identifiable Multivariate Modeling

    DEFF Research Database (Denmark)

    Henao, Ricardo; Winther, Ole

    2011-01-01

    In this paper we consider sparse and identifiable linear latent variable (factor) and linear Bayesian network models for parsimonious analysis of multivariate data. We propose a computationally efficient method for joint parameter and model inference, and model comparison. It consists of a fully...... Bayesian hierarchy for sparse models using slab and spike priors (two-component δ-function and continuous mixtures), non-Gaussian latent factors and a stochastic search over the ordering of the variables. The framework, which we call SLIM (Sparse Linear Identifiable Multivariate modeling), is validated...... and bench-marked on artificial and real biological data sets. SLIM is closest in spirit to LiNGAM (Shimizu et al., 2006), but differs substantially in inference, Bayesian network structure learning and model comparison. Experimentally, SLIM performs equally well or better than LiNGAM with comparable...

  16. Logistic Regression Analysis on Influencing Factors of Hypertension in Rural Areas of Zhuhai%珠海市农村地区高血压流行影响因素Logistic回归分析

    Institute of Scientific and Technical Information of China (English)

    周伴群; 李德云; 梁小冬

    2011-01-01

    目的 了解珠海市农村地区高血压流行现状及其影响因素.方法 在珠海市斗门和金湾农村地区采用多阶段分层随机整群抽样方法,对641名15~69岁常驻居民进行高血压影响因素问卷调查和身高、体重、血压测量,并应用多因素非条件Logistic回归模型分析高血压危险因素.结果 珠海市农村地区调查人群高血压患病率24.0%,标化率22.7%,其中男性、女性标化率分别为24.9%、21.4%,男性和女性之间高血压患病率差异无统计学意义(u=1.086,P>0.05).Logistic回归分析显示年龄、饮酒、超重和肥胖是高血压的危险因素(P<0.05),其OR值分别为1.070、1.624、2.126和10.508;每周食用水果种类是高血压的保护因素(P<0.05),其OR值为0.509.结论 珠海市农村地区高血压患病率接近中国居民平均水平,对农村居民健康危害较为严重,应针对高血压的危险因素和保护因素,加强居民健康教育,改变饮酒等不良生活方式,控制超重和肥胖,多吃水果,预防高血压.%Objective To understand the prevalence of hypertension and its influencing factors in the rural areas of Zhu-hai. Methods With a stratified multi - stage cluster random sampling method, 641 inhabitants aged 15-69 years were selected from rural areas of Doumen and Jinwan in Zhuhai. A questionnaire- based hypertension survey was performed in conjunction of the measurement of body height, body weight and blood pressure among the inhabitants. In addition, a multivariate unconditional Logistic regression model was employed to analyze the influencing factors of hypertension. Results The prevalence and standardized rates of hypertension among the rural study population in Zhuhai were 24.0% and 22.7%, respectively. The standardized rates of male and female were 24.9% and 21.4%, respectively. No statistically significant difference was found in the standardized rate of hypertension between male and female (u= 1.086,P>0

  17. Methods of Multivariate Analysis

    CERN Document Server

    Rencher, Alvin C

    2012-01-01

    Praise for the Second Edition "This book is a systematic, well-written, well-organized text on multivariate analysis packed with intuition and insight . . . There is much practical wisdom in this book that is hard to find elsewhere."-IIE Transactions Filled with new and timely content, Methods of Multivariate Analysis, Third Edition provides examples and exercises based on more than sixty real data sets from a wide variety of scientific fields. It takes a "methods" approach to the subject, placing an emphasis on how students and practitioners can employ multivariate analysis in real-life sit

  18. Impact of Third-party Logistics Enterprise Customer Loyalty Degree Research Status and Development Factors%第三方物流企业顾客忠诚度影响因素研究发展现状

    Institute of Scientific and Technical Information of China (English)

    林燕菁; 彭定桂

    2014-01-01

    With the increasingly competitive logistics industry,third -party logistics companies to survive in the market and create the profits of the enterprise must understand the customer's loyalty.Research scholars from third -party logistics enterprise customer loyalty factors departure,have put forward their own ideas and theories.%随着物流行业竞争日益激烈,第三方物流企业要在市场中维持生存并创造利润就必须了解顾客对企业的忠诚度。国内外学者对第三方物流企业顾客忠诚度的研究从影响因素出发,纷纷提出自己的观点和理论。

  19. New Technology Applications for Military Logistics

    Science.gov (United States)

    2002-03-01

    This paper is a preliminary examination of the relationship between various new technologies and modern military logistics . A brief overview of...Canadian military logistics is given together with a list of important factors such as defence policy and geography that play a significant role in...number of leading-edge technologies are listed and their potential relationships with military logistics are highlighted. Finally, a short discussion of the opportunities and risks contained in these relationships is presented.

  20. Logistics Innovation Process Revisited

    DEFF Research Database (Denmark)

    Gammelgaard, Britta; Su, Shong-Iee Ivan; Yang, Su-Lan

    2011-01-01

    innovation process model may include not just customers but also suppliers; logistics innovation in buyer-supplier relations may serve as an alternative to outsourcing; logistics innovation processes are dynamic and may improve supplier partnerships; logistics innovations in the supply chain are as dependent...... into the process of a logistics innovation in an oriental healthcare supply chain context. The study is, however, still limited in disclosing end-to-end supply chain benefits including concrete performance improvements at the suppliers. Examining logistics innovation processes should result not only......Purpose – The purpose of this paper is to learn more about logistics innovation processes and their implications for the focal organization as well as the supply chain, especially suppliers. Design/methodology/approach – The empirical basis of the study is a longitudinal action research project...

  1. Logistic regression analysis of risk factors of stress complications in patients with multiple trauma%多发伤患者应激并发症危险因素的logistic回归分析

    Institute of Scientific and Technical Information of China (English)

    徐文鹏; 应佑国; 方玉明; 秦宗和

    2014-01-01

    目的:探讨导致多发伤患者应激并发症相关的危险因素。方法:对64例多发伤患者应激并发症危险因素的相关指标进行单因素及多因素logistic 回归分析,收集血常规、C反应蛋白、血糖、血电解质、血气分析、肝肾功能等指标以及测定血清总三碘甲状腺原氨酸(TT3)、血清游离三碘甲状腺原氨酸(FT3)、血清总甲状腺素(TT4)、血清游离总甲状腺素、促甲状腺激素、促肾上腺皮质激素( ACTH)、血皮质醇( COR)、生长激素,细胞因子白介素( IL)-1、IL-6、IL-8、IL-10、肿瘤坏死因子( TNF-α)等。结果:64例出现应激性溃疡、急性呼吸窘迫综合征等应激并发症48例,出现应激并发症和无并发症患者,急性生理与慢性健康(APACH)Ⅱ评分、COR、ACTH、TT3、FT3、TT4、IL-6、IL-8、IL-10、TNF-α等差异均有统计学意义(P<0.05~P<0.01);多因素logistic分析表明,APACH Ⅱ评分、TT4、COR、IL-6和IL-10为早期应激并发症的独立危险因素(P<0.05~P<0.01)。结论:多发伤患者APACHⅡ评分以及创伤后TT4、COR、IL-6、IL-10等指标的变化与患者应激性消化道出血及呼吸窘迫综合征等应激并发症的出现密切相关。%Objective:To investigate the risk factors of stress complications in patients with multiple trauma. Methods:The clinical data of stress complications in 64 patients with multiple trauma were analyzed by univariate and multivariate binary Logistic regression. The data of routine blood,c-reactive protein,blood sugar,blood electrolytes,blood gas analysis,indexes of liver and kidney function, serum total iodine thyroid glycine(TT3),serum free thyroid original three iodine glycine(FT3),total serum thyroxine(TT4),serum free thyroid hormone,thyroid stimulating hormone,adrenocorticotropic hormone(ACTH),blood cortisol(COR),growth hormone,cytokine interleukin(IL)-1,IL-6,IL 8,IL-10 and tumor necrosis factor(TNF-α) in all cases were investigated. Results

  2. Focused Logistics: Putting Agility in Agile Logistics

    Science.gov (United States)

    2011-05-19

    list, ahead of companies like American Express, DuPont and Coca Cola; Supports nearly 1,900 weapon systems; DLA manages eight supply chains and...maneuver units and cumbersome logistics tail that executed and supported operations during the 1st Gulf War. The initial sustainment concept in

  3. 基于因子分析的合肥新型城镇化对物流业的影响研究%Influence of New Type Urbanization on the Logistics Industry in Hefei Based on Factor

    Institute of Scientific and Technical Information of China (English)

    梁雯; 凌珊

    2014-01-01

    2000-2012 time series data in Hefei was analyzed in this paper,via the factor analysis,corre-lation analysis and regression analysis,some empirical analysis were made for the relationship between the added value of logistics and the new type urbanization level. It showed that there wasn′t a good coordina-tion between the new type urbanization and the logistics industry. The common factors of new type urbani-zation′s influence factors have different influence degree on logistics industry. The decision makers should consider the factors with larger influence coefficient, but the weaknesses are more important when they promote the new type urbanization and the development of logistics industry,so as to make coordinated de-velopment between the new type urbanization and the logistics industry.%通过合肥市2000-2012年的时间序列数据,利用因子分析、相关分析、回归分析等方法,对人均物流增加值和新型城镇化水平之间的关系进行实证分析。研究表明,新型城镇化和物流业之间还没有形成良好的协调作用,新型城镇化影响因素中的几个公共因子对物流业的影响程度各有不同,决策者在推动新型城镇化和促进物流业发展时既要考虑影响系数大的因素,更要找出其中的薄弱之处,从而使新型城镇化能与物流业协调发展。

  4. Maritime logistics: contemporary issues

    National Research Council Canada - National Science Library

    Song, D.W; Panayides, P.M

    2012-01-01

    Contemporary practice and scientific innovation consider the logistics aspects of shipping and seaport operations as one of the most important areas for future development of competitive advantages...

  5. Tertiary Logistics in the Focus of All Logistics

    OpenAIRE

    Ratko Zelenika; Mirjana Grèiæ; Helga Pavliæ Skender

    2008-01-01

    Trade logistics, traffic logistics, transport logistics and warehouse logistics are just some of the tertiary logistics which enables production processes of all economic sector products and services. Tertiary logistics representing the tertiary economic sector is the most sofisticated and the most important logistics due to the characteristics of the tertiary sector as a service sector that promotes business conditions in all economic sectors. Accordingly, tertiary logistics has a crucial ro...

  6. Logistics and logistics support in crisis management and citizen protection

    OpenAIRE

    HOLEJŠOVSKÝ, Jan

    2010-01-01

    ABSTRAKT LOGISTICS AND LOGISTICS SUPPORT IN CRISIS MANAGEMENT AND CITIZEN PROTECTION The graduation thesis on topic ``Logistics and logistics support in crisis management and citizen protection" is divided into several chapters, which in summary are a material presenting information about logistics and logistics support in crisis management and citizen protection. This was one of the aims at this work. Chapters I., II., III., IV. describe logistics and logistics support, crisis management, ci...

  7. Logistics and logistics support in crisis management and citizen protection

    OpenAIRE

    HOLEJŠOVSKÝ, Jan

    2010-01-01

    ABSTRAKT LOGISTICS AND LOGISTICS SUPPORT IN CRISIS MANAGEMENT AND CITIZEN PROTECTION The graduation thesis on topic ``Logistics and logistics support in crisis management and citizen protection" is divided into several chapters, which in summary are a material presenting information about logistics and logistics support in crisis management and citizen protection. This was one of the aims at this work. Chapters I., II., III., IV. describe logistics and logistics support, crisis management, ci...

  8. Multivariate Time Series Search

    Data.gov (United States)

    National Aeronautics and Space Administration — Multivariate Time-Series (MTS) are ubiquitous, and are generated in areas as disparate as sensor recordings in aerospace systems, music and video streams, medical...

  9. Logistic regression analysis on risk factors of fetal growth restriction%胎儿生长受限高危因素的Logistic回归分析

    Institute of Scientific and Technical Information of China (English)

    陈忠; 许建娟

    2012-01-01

    Objective: To explore the risk factors of fetal growth restriction (FGR) . Methods: A 1: 1 matched case - control study was conducted. The clinical data of 276 neonates with FGR (FGR group) and 276 neonates with normal weight (normal group) born in the hospital and the parturient women in 2011 were analyzed retrospectively. Results; There were statistically significant differences in maternal age, educational level, family monthly income, smoking, drinking tea, history of gestational infection, gestational complications, and fetal age of neonates between FGR group and normal group ( P < 0.05) . Taking neonatal weight as dependent variable, and taking the other factors as independent variables, non - conditional logistic regression analysis was conducted, the results showed that there were statistically significant differences in maternal age, educational level, family monthly income, smoking, drinking tea, history of gestational infection, gestational complications, and fetal age of neonates (P < 0.05) . Conclusion: High maternal age, low educational level, low family monthly income, smoking, drinking tea, history of gestational infection, gestational complications, and low fetal age of neonates are high risk factors of FGR. Active prevention targeting to the above - mentioned high risk factors during gestational period should be conducted to reduce the occurrence of FGR.%目的:探讨胎儿生长受限(FGR)发生的高危因素.方法:采用1∶1配比的病例对照研究设计,对2011年在该院分娩的276例FGR新生儿(FGR组)及276例正常体重新生儿(正常组)及其产妇病历资料进行回顾性分析.结果:FGR组与正常组在产妇年龄、文化程度、家庭月收入、吸烟、饮茶、妊娠期感染史、妊娠期合并症、妊娠期并发症、新生儿胎龄等单因素方面比较存在差异,差异有统计学意义(P<0.05);以新生儿体重为因变量,其他因素为自变量,进行非条件性的Logistic多因素分析,结果

  10. Calibração multivariada para sistemas com bandas sobrepostas através da análise da fatores do tipo Q Q mode factor multivariate calibration for systems with overlapped bands

    Directory of Open Access Journals (Sweden)

    Ieda Spacino Scarminio

    1998-10-01

    Full Text Available A multivariate calibration method to determine chemical compositions of systems with severely overlapped bands is proposed. Q mode factors are determined from the spectral data and subsequently rotated using the varimax and oblique transformation of Imbrie. The method is applied to two sets of simulated data to test the sensitivity of analytical results to random experimental error. The chemical concentrations of alanine and threonine mixture are determined from spectral data of the 302,5 - 548,5 nm region.

  11. Study on the Evaluation of Green Degree in Coal Logistics Park Based on Factor Analysis%基于因素评分法的煤炭物流园区绿色度评价研究

    Institute of Scientific and Technical Information of China (English)

    范存军

    2015-01-01

    实现煤炭物流园区绿色化是实现煤炭物流从黑色物流到绿色物流转变的关键环节。在分析了我国煤炭物流园区的积极作用和非绿色因素的基础上,构建了煤炭物流园区绿色度评价指标体系以及各指标的考核内容,给出了运用因素评分法进行绿色度评价的方法步骤,并通过实例证实了其有效性。%The greenization of coal logistics park is the key link of transformation from black logistics to green logistics. Based on the analysis of positive significance and non -green factors,the index system to evaluate green degree of coal logistics park in China is constructed,and the procedures of applying factor analysis to the evaluation of green degree is established,whose validity is verified with a living example.

  12. Behavioral Operations in Logistics

    NARCIS (Netherlands)

    J. de Vries (Jelle)

    2016-01-01

    markdownabstractIn the world of logistics, a considerable share of all work is automated and performed by machines or robots. An examination of the existing logistics research reflects this image, since a substantial share of the studies focus on automated processes, and perfectly predictable system

  13. Behavioral Operations in Logistics

    NARCIS (Netherlands)

    J. de Vries (Jelle)

    2016-01-01

    markdownabstractIn the world of logistics, a considerable share of all work is automated and performed by machines or robots. An examination of the existing logistics research reflects this image, since a substantial share of the studies focus on automated processes, and perfectly predictable

  14. The development of logistics centres : important factor of increasing transport sector efficiency = Razvitije logistitsheskihh tsentrov : vazhnõi faktor uvelitshenija effektivnosti transportnogo sektora / Algirdas Sakalys

    Index Scriptorium Estoniae

    Sakalys, Algirdas

    2003-01-01

    Ettekanne 3.-4. detsembrini 2003 Tallinnas toimunud rahvusvahelisel konverents-näitusel "Logistics and transport in international trade" teeb ülevaate Leedu transpordisüsteemi olukorrast, arengustrateegiast ja reformidest, lähtudes Euroopa Liidu transpordipoliitika tegevuskavast. Kaardid. Diagramm. Tabel

  15. The development of logistics centres : important factor of increasing transport sector efficiency = Razvitije logistitsheskihh tsentrov : vazhnõi faktor uvelitshenija effektivnosti transportnogo sektora / Algirdas Sakalys

    Index Scriptorium Estoniae

    Sakalys, Algirdas

    2003-01-01

    Ettekanne 3.-4. detsembrini 2003 Tallinnas toimunud rahvusvahelisel konverents-näitusel "Logistics and transport in international trade" teeb ülevaate Leedu transpordisüsteemi olukorrast, arengustrateegiast ja reformidest, lähtudes Euroopa Liidu transpordipoliitika tegevuskavast. Kaardid. Diagramm. Tabel

  16. Improving Healthcare Logistics Processes

    DEFF Research Database (Denmark)

    Feibert, Diana Cordes

    provision whilst providing high quality care. Logistics activities in hospitals provide a significant opportunity for cost containment in healthcare through the implementation of best practices. Literature provides little guidance on how to improve healthcare logistics processes. This study investigates......Healthcare costs are increasing due to an ageing population and more sophisticated technologies and treatments. At the same time, patients expect high quality care at an affordable cost. The healthcare industry has therefore experienced increasing pressures to reduce the cost of healthcare...... logistics processes in hospitals and aims to provide theoretically and empirically based evidence for improving these processes to both expand the knowledge base of healthcare logistics and provide a decision tool for hospital logistics managers to improve their processes. Case studies were conducted...

  17. SIMULATION OF LOGISTICS PROCESSES

    Directory of Open Access Journals (Sweden)

    Yu. Taranenko

    2016-08-01

    Full Text Available The article deals with the theoretical basis of the simulation. The study shows the simulation of logistic processes in industrial countries is an integral part of many economic projects aimed at the creation or improvement of logistics systems. The paper was used model Beer Game for management of logistics processes in the enterprise. The simulation model implements in AnyLogic package. AnyLogic product allows us to consider the logistics processes as an integrated system, which allows reaching better solutions. Logistics process management involves pooling the sales market, production and distribution to ensure the temporal level of customer service at the lowest cost overall. This made it possible to conduct experiments and to determine the optimal size of the warehouse at the lowest cost.

  18. International Logistics Science Conference

    CERN Document Server

    Hompel, Michael; Meier, J

    2014-01-01

    The importance of logistics in all its variations is still increasing. New technologies emerge, new planning methods and algorithms are developed, only to face a market with a growing complexity and the need of weighting monetary costs against ecological impact. Mastering these challenges requires a scientific viewpoint on logistics, but always with applications in mind. This volume presents up-to-date logistics research in all its diversity and interconnectedness. It grew out of the “International Logistics Science Conference” (ILSC) held in Dortmund in September 2013, bringing together leading scientists and young academics from nine different countries. The conference was jointly organized by the “Efficiency Cluster Logistics” and the “Fraunhofer Institute for Material Flow and Logistics”. The Program Committee used a double blind review process to choose the 12 strongest contributions, which were then grouped in four areas: - Sustainability logistics, including electric mobility, smart inform...

  19. 先天性耳前瘘管术后感染危险因素logistic回归分析%Logistic regression analysis of risk factors for postoperative infections in congenital preauricular fistula

    Institute of Scientific and Technical Information of China (English)

    刘爱清; 沈玉莲; 李国红; 董梅; 崔方勇

    2016-01-01

    OBJECTIVE To investigate the effect of interventions for postoperative infections in congenital preauric‐ular fistula and the risk factors associated with postoperative infections ,in order to provide evidence for reducing the incidence of postoperative infections .METHODS A total of 900 patients with congenital preauricular fistula un‐dergoing surgical therapy in hospital from Jan .2010 to Dec .2014 were collected ,and they were randomly divided into control and intervention groups ,450 cases in each group .Patients in the control group were given convention‐al care ,while patients in the intervention group received comprehensive nursing intervention .Cured time was re‐corded in two groups .Risk factors for postoperative infection in congenital preauricular fistula were analyzed by multivariate regression logistic analysis .The results were analyzed by using SPSS 16 .0 software for statistical a‐nalysis .RESULTS The infection rate in the intervention group was significantly lower than the control group (χ2 =7 .3852 ,P<0 .01) ,the recovery time in intervention group was significantly shorter than the control group (t=14 .90 ,P<0 .01) .The univariate analysis showed that hospitalization ≥7 d ,operation time ≥30 min and use of antimicrobial drugs were independent risk factors for postoperative infections in congenital preauricular fistula (P<0 .05) .CONCLUSION The results show that comprehensive nursing can reduce the incidence of postoperative infections in patients with congenital preauricular fistula .%目的:探讨干预措施对先天性耳前瘘管术后感染影响与相关危险因素,为降低先天性耳前瘘管术后感染提供参考依据。方法收集2010年1月-2014年12月医院收治的900例先天性耳前瘘管行手术治疗患者为研究对象,随机分为对照组和干预组,各450例,对照组采用常规护理,干预组采用综合护理干预,记录两组患者痊愈时间及

  20. Logistic regression analysis on risk factors of cerebral hemorrhage complicated with stress ulcer%脑出血并发应激性溃疡危险因素的logistic回归分析

    Institute of Scientific and Technical Information of China (English)

    薛翔; 刘红梅; 邵旦兵; 张炜; 任艺; 孙兆瑞; 林金锋; 聂时南

    2014-01-01

    cerebral hemorrhage complicated with stress ulcer (SU). Methods The clinical data of 1 185 patients with cerebral hemorrhage admitted to Department of Emergency Medicine of Nanjing General Hospital from March 2006 to March 2014 were retrospectively analyzed. Patients were divided into two groups according to whether patients complicated with SU or not. Data was collected within 8 hours after admission in two groups including gender,age,amount of bleeding,the bleeding site (basal ganglia,thalamus, brainstem,brain lobe,ventricle,subarachnoid,and cerebellum),disturbance of consciousness,acute physiology and chronic health evaluationⅡ(APACHEⅡ)score,systolic blood pressure(SBP),history of hypertension,and history of cerebral hemorrhage. The statistically significant risk factors found using univariate analysis was selected and was analyzed to find independent risk factors with multivariate logistic regression analysis. The receiver operating characteristic curve (ROC curve)was plotted to analyze the independent risk factors and evaluate their power of test. Results 1 185 patients with cerebral hemorrhage were enrolled in the study,293 cases occurred SU,accounting for 24.7%,and 892 cases without SU,which accounted for 75.3%. As shown by univariate analysis,risk factors for cerebral hemorrhage complicated with SU included age,amount of bleeding,the bleeding site,disturbance of consciousness,APACHEⅡscore,SBP. As to the site of bleeding,brain,thalamus,brainstem hemorrhage complicated with SU were higher proportion,45.3%(43/95),39.1%(63/161),36.9%(48/130),which were significantly higher than those of the lobes of the brain 〔26.2% (33/126)〕,cerebellum 〔18.8% (15/80)〕,basal ganglia〔16.1%(78/485)〕,arachnoid the inferior vena cava 〔12.0% (13/108)〕. Multivariate logistic regression analysis showed that amount of bleeding 〔odds ratio (OR)=3.305,P=0.001,95%confidence interval (95%CI)2.213-48.634〕,the bleeding site (OR=1.762,P=0.008,95%CI 0.123-2.743),SBP (OR=1

  1. Do salivary bypass tubes lower the incidence of pharyngocutaneous fistula following total laryngectomy? A retrospective analysis of predictive factors using multivariate analysis.

    Science.gov (United States)

    Hone, Robert W A; Rahman, Eqramur; Wong, Gentle; Annan, Yvette; Alexander, Victoria; Al-Lami, Ali; Varadharajan, Kiran; Parker, Michael; Simo, Ricard; Pitkin, Lisa; Mace, Alasdair; Ofo, Enyinnaya; Balfour, Alistair; Nixon, Iain J

    2017-04-01

    Salivary bypass tubes (SBT) are increasingly used to prevent pharyngocutaneous fistula (PCF) following laryngectomy and pharyngolaryngectomy. There is minimal evidence as to their efficacy and literature is limited. The aim of the study was to determine if SBT prevent PCF. The study was a multicentre retrospective case control series (level of evidence 3b). Patients who underwent laryngectomy or pharyngolaryngectomy for cancer or following cancer treatment between 2011 and 2014 were included in the study. The primary outcome was development of a PCF. Other variables recorded were age, sex, prior radiotherapy or chemoradiotherapy, prior tracheostomy, type of procedure, concurrent neck dissection, use of flap reconstruction, use of prophylactic antibiotics, the suture material used for the anastomosis, tumour T stage, histological margins, day one post-operative haemoglobin and whether a salivary bypass tube was used. Univariate and multivariate analysis were performed. A total of 199 patients were included and 24 received salivary bypass tubes. Fistula rates were 8.3% in the SBT group (2/24) and 24.6% in the control group (43/175). This was not statistically significant on univariate (p value 0.115) or multivariate analysis (p value 0.076). In addition, no other co-variables were found to be significant. No group has proven a benefit of salivary bypass tubes on multivariate analysis. The study was limited by a small case group, variations in tube duration and subjects given a tube may have been identified as high risk of fistula. Further prospective studies are warranted prior to recommendation of salivary bypass tubes following laryngectomy.

  2. 老年术后病例院内感染危险因素 Logistic 分析%Logistic regression analysis on related factors of postoperative nosocomial infection of Elderly cases

    Institute of Scientific and Technical Information of China (English)

    郑颖

    2016-01-01

    目的:研究老年术后病例院内感染的危险因素及临床防治措施。方法分析2013年1月至2016年1月在本院接受外科手术治疗的81例老年住院病例的临床资料,其中39例纳入感染组,另纳入42例同期术后未感染的病例作为对照组,研究老年术后病例院内感染危险因素。结果导致老年人发生院内感染的病原菌多为革兰阴性杆菌。两组研究对象在是否患有糖尿病、手术时间的长短、手术方式、气管插管及时间、尿管插管及时间、住院时间和是否使用抗生素相关因素水平上术后感染率差异具有统计学意义(P<0.05)。结论糖尿病、手术时间及方式、气管插管及时间、尿管插管及时间、住院时间、是否使用过抗生素是老年病例术后发生院内感染的危险因素。因此在保证治疗效果的情况下尽量改善手术方式、缩短手术时间、缩短患者住院时间、合理使用医用装置、防止抗生素滥用,能够有效的控制院内感染的发生。%Objective To research the risk factors of postoperative nosocomial infection of elderly cases and the clinical prevention and control measures.Methods Analyzing the clinical data of 81 elderly cases that got surgical treatment in our hospital during January 2013 and January 2016.39 cases were enrolled in infection group, another 42 cases of patients who didn't suffering postoperative infection cases were chose as control group during the same period, research for risk factors of postoperative nosocomial infection in elderly cases.Results The pathogenic bacteria of nosocomial infection of older people were mainly gram-negative bacilli.The duration of surgery, surgery way, urine tube intubation, endotracheal intubation and time, length of hospital stay, and whether to use antibiotics related factor levels had statistically significant difference on postoperative infection rate ( P <0.05).Conclusions Diabetes, the duration

  3. Multivariate Birkhoff interpolation

    CERN Document Server

    Lorentz, Rudolph A

    1992-01-01

    The subject of this book is Lagrange, Hermite and Birkhoff (lacunary Hermite) interpolation by multivariate algebraic polynomials. It unifies and extends a new algorithmic approach to this subject which was introduced and developed by G.G. Lorentz and the author. One particularly interesting feature of this algorithmic approach is that it obviates the necessity of finding a formula for the Vandermonde determinant of a multivariate interpolation in order to determine its regularity (which formulas are practically unknown anyways) by determining the regularity through simple geometric manipulations in the Euclidean space. Although interpolation is a classical problem, it is surprising how little is known about its basic properties in the multivariate case. The book therefore starts by exploring its fundamental properties and its limitations. The main part of the book is devoted to a complete and detailed elaboration of the new technique. A chapter with an extensive selection of finite elements follows as well a...

  4. Applied multivariate statistical analysis

    CERN Document Server

    Härdle, Wolfgang Karl

    2015-01-01

    Focusing on high-dimensional applications, this 4th edition presents the tools and concepts used in multivariate data analysis in a style that is also accessible for non-mathematicians and practitioners.  It surveys the basic principles and emphasizes both exploratory and inferential statistics; a new chapter on Variable Selection (Lasso, SCAD and Elastic Net) has also been added.  All chapters include practical exercises that highlight applications in different multivariate data analysis fields: in quantitative financial studies, where the joint dynamics of assets are observed; in medicine, where recorded observations of subjects in different locations form the basis for reliable diagnoses and medication; and in quantitative marketing, where consumers’ preferences are collected in order to construct models of consumer behavior.  All of these examples involve high to ultra-high dimensions and represent a number of major fields in big data analysis. The fourth edition of this book on Applied Multivariate ...

  5. 基于SPSS因子分析法的企业绿色供应链绩效评价%Performance Evaluation for Enterprise Green Logistics Based on SPSS Factor Analysis

    Institute of Scientific and Technical Information of China (English)

    张安霞; 张红岩; 陈彦召; 陈焕江

    2011-01-01

    结合绿色物流发展的客观要求,确定了发展绿色物流的主要影响因素,研究了利用因子分析法对绿色物流供应链的绩效评价方法,其研究结果可用于评价绿色供应链的绩效及分析绿色供应链的运作过程.%Considering the objective requirements for the development of green logistics, the paper identifies the main factors influencing the implementation of green logistics by enterprises and explores the premises and procedures of green supply chain performance evaluation through SPSS factor analysis.

  6. Multivariate bubbles and antibubbles

    Science.gov (United States)

    Fry, John

    2014-08-01

    In this paper we develop models for multivariate financial bubbles and antibubbles based on statistical physics. In particular, we extend a rich set of univariate models to higher dimensions. Changes in market regime can be explicitly shown to represent a phase transition from random to deterministic behaviour in prices. Moreover, our multivariate models are able to capture some of the contagious effects that occur during such episodes. We are able to show that declining lending quality helped fuel a bubble in the US stock market prior to 2008. Further, our approach offers interesting insights into the spatial development of UK house prices.

  7. Security in Logistics

    Science.gov (United States)

    Cempírek, Václav; Nachtigall, Petr; Široký, Jaromír

    2016-12-01

    This paper deals with security of logistic chains according to incorrect declaration of transported goods, fraudulent transport and forwarding companies and possible threats caused by political influences. The main goal of this paper is to highlight possible logistic costs increase due to these fraudulent threats. An analysis of technological processes will beis provided, and an increase of these transport times considering the possible threatswhich will beis evaluated economic costs-wise. In the conclusion, possible threat of companies'` efficiency in logistics due to the costs`, means of transport and increase in human resources` increase will beare pointed out.

  8. Applied logistic regression

    CERN Document Server

    Hosmer, David W; Sturdivant, Rodney X

    2013-01-01

     A new edition of the definitive guide to logistic regression modeling for health science and other applications This thoroughly expanded Third Edition provides an easily accessible introduction to the logistic regression (LR) model and highlights the power of this model by examining the relationship between a dichotomous outcome and a set of covariables. Applied Logistic Regression, Third Edition emphasizes applications in the health sciences and handpicks topics that best suit the use of modern statistical software. The book provides readers with state-of-

  9. Green Maritime Logistics

    DEFF Research Database (Denmark)

    Psaraftis, Harilaos N.

    2016-01-01

    By green maritime logistics we mean achieving an acceptable environmental performance of the maritime transport logistical supply chain while at the same time respecting traditional economic criteria. In this paper the environmental focus is on maritime emissions. Achieving such goal may involve...... several trade-offs, and win-win solutions are typically sought. However, finding these solutions may be more difficult than may appear at first glance. The purpose of this paper is to provide a concise overview of the challenges of green maritime logistics and present some examples, both for greenhouse...

  10. Social Environment Factors in Military Logistics Center Location Problem%军事物流中心选址与社会环境影响探析

    Institute of Scientific and Technical Information of China (English)

    高殿森; 梅全亭; 何申洁

    2011-01-01

    分析了军事物流中心选址要求及与周边社会环境存在的相互影响,提出在军事管理区外围一定距离内设定“军事管理缓冲区”,在当地的城乡规划中予以落实并进行有效的控制,可有效保护军事物流中心与周围居民的安全.%The paper analyzes the requirement of military logistics center site selection and and its influence on the surrounding social environment and points out that by adding a buffer zone round the ourskirt of the military control area in the planning and implementating of the local rural-urban layout can effectively protect the safety of the military logistics center and local residents.

  11. Risk factors for superficial surgical site infection after elective rectal cancer resection: a multivariate analysis of 8880 patients from the American College of Surgeons National Surgical Quality Improvement Program database.

    Science.gov (United States)

    Sutton, Elie; Miyagaki, Hiromichi; Bellini, Geoffrey; Shantha Kumara, H M C; Yan, Xiaohong; Howe, Brett; Feigel, Amanda; Whelan, Richard L

    2017-01-01

    Superficial surgical site infection (sSSI) is one of the most common complications after colorectal resection. The goal of this study was to determine the comorbidities and operative characteristics that place patients at risk for sSSI in patients who underwent rectal cancer resection. The American College of Surgeons National Surgical Quality Improvement Program database was queried (via diagnosis and Current Procedural Terminology codes) for patients with rectal cancer who underwent elective resection between 2005 and 2012. Patients for whom data concerning 27 demographic factors, comorbidities, and operative characteristics were available were eligible. A univariate and multivariate analysis was performed to identify possible risk factors for sSSI. A total of 8880 patients met the entry criteria and were included. sSSIs were diagnosed in 861 (9.7%) patients. Univariate analysis found 14 patients statistically significant risk factors for sSSI. Multivariate analysis revealed the following risk factors: male gender, body mass index (BMI) >30, current smoking, history of chronic obstructive pulmonary disease (COPD), American Society of Anesthesiologists III/IV, abdominoperineal resection (APR), stoma formation, open surgery (versus laparoscopic), and operative time >217 min. The greatest difference in sSSI rates was noted in patients with COPD (18.9 versus 9.5%). Of note, 54.2% of sSSIs was noted after hospital discharge. With regard to the timing of presentation, univariate analysis revealed a statistically significant delay in sSSI presentation in patients with the following factors and/or characteristics: BMI Multivariate analysis suggested that only laparoscopic surgery (versus open) and preoperative RT were risk factors for delay. Rectal cancer resections are associated with a high incidence of sSSIs, over half of which are noted after discharge. Nine patient and operative characteristics, including smoking, BMI, COPD, APR, and open surgery were found to be

  12. Study on medication compliance level of patients with diabetes mellitus and logistic regression analysis of related factors%深圳市糖尿病患者服药依从性及相关危险因素分析

    Institute of Scientific and Technical Information of China (English)

    黄雪梅; 叶国永; 陈媚珠

    2016-01-01

    Objective To learn the level of medication compliance of patients with diabetes and the influencing factors ,and to provide evidences for diabetes intervention .Methods 547 cases of diabetic patients in the hospital were investigated .The basic situation , diabetes prevalence and drug compliance were investigated .Univariate and multivariate analy is were performed .Results The lev-el of medication compliance of patients with diabetes was closely associated with the level of education ,living conditions ,complica-tions ,the number of blood glucose monitoring ,course of disease ,the awareness rates of DM ,kinds of drug and therapeutic regi-ments .And after logistic regression analysis ,we knew that the course of disease(OR=1 .776 ,P=0 .011) ,the awareness rates of DM(OR=1 .634 ,P= 0 .009) and therapeutic regiments(OR= 3 .867 ,P= 0 .013) were related to self-management .Conclusion The compliance depends on many factors ,including health education ,family support and the economic situation .%目的:了解本地区糖尿病患者服药依从性及其影响因素,为进一步开展糖尿病预防控制工作提供依据。方法对就诊于本院门诊的547例糖尿病患者进行调查,对其基本情况、糖尿病患病情况以及服药依从情况进行调查,并进行单因素和多因素分析。结果从糖尿病服药依从性单因素分析发现,依从性与居住情况、并发症情况、文化程度、监测血糖次数、病程长短、糖尿病知晓率、服药种类等因素相关。Logistic多因素回归分析发现病程(OR=1.776,P=0.011),DM 知识知晓率(OR=1.634,P=0.009)和治疗复杂程度(OR=3.867,P=0.013)是影响糖尿病患者用药依从性的独立相关因素。结论糖尿病患者用药依从性与多种因素相关,而加强糖尿病患者健康教育、简化治疗方案、加强社会支持、长期规律用药等有利于患者治疗用药依从性的提高。

  13. Logistics and Inventory System -

    Data.gov (United States)

    Department of Transportation — The Logistics and Inventory System (LIS) is the agencys primary supply/support automation tool. The LIS encompasses everything from order entry by field specialists...

  14. Green Logistics Management

    Science.gov (United States)

    Chang, Yoon S.; Oh, Chang H.

    Nowadays, environmental management becomes a critical business consideration for companies to survive from many regulations and tough business requirements. Most of world-leading companies are now aware that environment friendly technology and management are critical to the sustainable growth of the company. The environment market has seen continuous growth marking 532B in 2000, and 590B in 2004. This growth rate is expected to grow to 700B in 2010. It is not hard to see the environment-friendly efforts in almost all aspects of business operations. Such trends can be easily found in logistics area. Green logistics aims to make environmental friendly decisions throughout a product lifecycle. Therefore for the success of green logistics, it is critical to have real time tracking capability on the product throughout the product lifecycle and smart solution service architecture. In this chapter, we introduce an RFID based green logistics solution and service.

  15. Logistics innovation development

    DEFF Research Database (Denmark)

    Pedrosa, Alex; Blazevic, Vera; Jasmand, Claudia

    2014-01-01

    Purpose This paper aims to investigate the microfoundations—boundary-spanning employees activities and behaviors—of deepening and broadening customer knowledge during logistics innovation development. Design/methodology/approach A multiple case study approach (six case studies) was adopted...... to investigate the role of boundary-spanning employees in deepening and broadening customer knowledge while developing logistics service innovations. Findings The results show that boundary-spanning employees’ engage sequentially in deepening and broadening customer knowledge throughout the logistics innovation......, this paper contributes to the understanding of the individuals’ behaviors underlying organization-level phenomena, such as logistics service providers’ customer knowledge acquisition. Practical implications (if applicable) Our findings illustrate that boundary-spanning employees might be well advised...

  16. Multivariate data analysis

    DEFF Research Database (Denmark)

    Hansen, Michael Adsetts Edberg

    Interest in statistical methodology is increasing so rapidly in the astronomical community that accessible introductory material in this area is long overdue. This book fills the gap by providing a presentation of the most useful techniques in multivariate statistics. A wide-ranging annotated set...

  17. Multivariate realised kernels

    DEFF Research Database (Denmark)

    Barndorff-Nielsen, Ole Eiler; Hansen, Peter Reinhard; Lunde, Asger

    2011-01-01

    We propose a multivariate realised kernel to estimate the ex-post covariation of log-prices. We show this new consistent estimator is guaranteed to be positive semi-definite and is robust to measurement error of certain types and can also handle non-synchronous trading. It is the first estimator...

  18. Multivariate data analysis

    DEFF Research Database (Denmark)

    Hansen, Michael Adsetts Edberg

    Interest in statistical methodology is increasing so rapidly in the astronomical community that accessible introductory material in this area is long overdue. This book fills the gap by providing a presentation of the most useful techniques in multivariate statistics. A wide-ranging annotated set...

  19. A MULTIVARIATE WEIBULL DISTRIBUTION

    Directory of Open Access Journals (Sweden)

    Cheng Lee

    2010-07-01

    Full Text Available A multivariate survival function of Weibull Distribution is developed by expanding the theorem by Lu and Bhattacharyya. From the survival function, the probability density function, the cumulative probability function, the determinant of the Jacobian Matrix, and the general moment are derived.

  20. Sustainable logistics in practice

    OpenAIRE

    Fitria, Irza

    2011-01-01

    Improved logistical performance is one of the tools to mitigate greenhouse gases emissions from freight transport. The production company and transportation company should find the practice to decrease the emissions from their activity in distributions of goods. In this thesis, the sustainable logistics in practice in focal company (Ekornes) is studied. The potential improvement in relation to sustainable transportation principle is explained. Through qualitative method research, the theory r...

  1. Operational Logistics Wargame

    Science.gov (United States)

    2001-12-01

    Gettysburg CG 64 Ticonderoga 0 40 3 Nicholson DD 982 Spruance 20 0 4 Cole DDG 67 Arleigh Burke 60 20 5 Rueben James FFG 57 Perry 0 20 6 Halyburton FFG 40...the Operational Logistics Wargame and depicted in this document were obtained from a variety of sources including theses by Lt J.R. Sterba and Lt A.W...Consumption: Update, NPS, July 1996. Sterba , J. R., Operational Maneuver from the Sea Logistics Training Aid, NPS, September 1999, Troxell, A

  2. Lunar Commercial Mining Logistics

    Science.gov (United States)

    Kistler, Walter P.; Citron, Bob; Taylor, Thomas C.

    2008-01-01

    Innovative commercial logistics is required for supporting lunar resource recovery operations and assisting larger consortiums in lunar mining, base operations, camp consumables and the future commercial sales of propellant over the next 50 years. To assist in lowering overall development costs, ``reuse'' innovation is suggested in reusing modified LTS in-space hardware for use on the moon's surface, developing product lines for recovered gases, regolith construction materials, surface logistics services, and other services as they evolve, (Kistler, Citron and Taylor, 2005) Surface logistics architecture is designed to have sustainable growth over 50 years, financed by private sector partners and capable of cargo transportation in both directions in support of lunar development and resource recovery development. The author's perspective on the importance of logistics is based on five years experience at remote sites on Earth, where remote base supply chain logistics didn't always work, (Taylor, 1975a). The planning and control of the flow of goods and materials to and from the moon's surface may be the most complicated logistics challenges yet to be attempted. Affordability is tied to the innovation and ingenuity used to keep the transportation and surface operations costs as low as practical. Eleven innovations are proposed and discussed by an entrepreneurial commercial space startup team that has had success in introducing commercial space innovation and reducing the cost of space operations in the past. This logistics architecture offers NASA and other exploring nations a commercial alternative for non-essential cargo. Five transportation technologies and eleven surface innovations create the logistics transportation system discussed.

  3. Conference Logistics Management 2013

    CERN Document Server

    Haasis, Hans-Dietrich; Kopfer, Herbert; Kotzab, Herbert; Schönberger, Jörn

    2015-01-01

    This contributed volume contains the collected research papers presented at the Logistik-Management-Konferenz 2013 organized by the VHB Wissenschaftliche Kommission Logistik, held in Bremen 2013. The papers reflect the current state-of-the-art in logistics and supply chain management, focusing on environmental sustainability in logistics and supply chain network dynamics and control. The target audience primarily comprises research experts in the field as well as practitioners but the book may also be beneficial for graduate students.

  4. Methodical approach to financial stimulation of logistics managers

    Directory of Open Access Journals (Sweden)

    Melnykova Kateryna V.

    2014-01-01

    Full Text Available The article offers a methodical approach to financial stimulation of logistics managers, which allows calculation of the incentive amount with consideration of profit obtained from introduction of optimisation logistics solutions. The author generalises measures, which would allow increase of stimulation of labour of logistics managers by the enterprise top managers. The article marks out motivation factors, which exert influence upon relation of logistics managers to execution of optimisation logistical solutions, which minimise logistical costs. The author builds a scale of financial encouragement for introduction of optimisation logistical solutions proposed by logistics managers. This scale is basic for functioning of the encouragement system and influences the increase of efficiency of logistics managers operation and also optimisation of enterprise logistical solutions.

  5. Multivariate analysis of risk factors with placental abruption in preeclampsia%子痫前期患者胎盘早剥发病危险因素分析

    Institute of Scientific and Technical Information of China (English)

    王雅楠; 杨孜

    2010-01-01

    preeclampsia terminated following placental abruption, 130 cases only with severe preeclampsia and 37 cases with unexplained placental abruption without preeclampsia.One hundred and multivariate regression analysis were used to identify the risk factors for placental abruption in patients with preeclampsia.Results (1) When compared with those in control group, univariate analysis showed that gravidity, parity, history of preeclampsia, second and third trimester pregnancy loss, history of autoimmune disease, chronic hypertension disease, lack of regular antenatal care, fetal growth restriction (FGR) and raises of umbilical artery Doppler resistance were risk factors associated with placental abruption.Logistic regression analysis showed that lack of a regular antenatal care ( OR = 45.348, 95% CI: 17.096 - 120.288,P = 0.000 ), FGR ( OR = 27.087, 95% CI: 5.585 - 131.363, P = 0.000 ) and second/third trimester pregnancy loss( OR = 16.068, 95% CI: 1.698 - 152.029, P = 0.015 ) were independent risk factors with placental abruption.(2) When compared with those in preeclampsia patients without placental abruption,the history of preeclampsia ( OR = 3.715,95% CI: 1.096 - 12.596, P = 0.035 ) and lack of a regular antenatal care( OR = 2.509,95% CI:1.173 -5.370,P =0.018) were risk factors for placental abruption in preeclampsia.Conclusion Lack of regular antenatal care, FGR, history of preeclampsia and second/third trimester pregnancy loss were risk factors associated with placental abruption in patients with preeclampsia.

  6. Exploratory and multivariate data analysis

    CERN Document Server

    Jambu, Michel

    1991-01-01

    With a useful index of notations at the beginning, this book explains and illustrates the theory and application of data analysis methods from univariate to multidimensional and how to learn and use them efficiently. This book is well illustrated and is a useful and well-documented review of the most important data analysis techniques.Key Features* Describes, in detail, exploratory data analysis techniques from the univariate to the multivariate ones* Features a complete description of correspondence analysis and factor analysis techniques as multidimensional statistical data a

  7. Multivariate residues and maximal unitarity

    Science.gov (United States)

    Søgaard, Mads; Zhang, Yang

    2013-12-01

    We extend the maximal unitarity method to amplitude contributions whose cuts define multidimensional algebraic varieties. The technique is valid to all orders and is explicitly demonstrated at three loops in gauge theories with any number of fermions and scalars in the adjoint representation. Deca-cuts realized by replacement of real slice integration contours by higher-dimensional tori encircling the global poles are used to factorize the planar triple box onto a product of trees. We apply computational algebraic geometry and multivariate complex analysis to derive unique projectors for all master integral coefficients and obtain compact analytic formulae in terms of tree-level data.

  8. Logistics Indicators Could Improve Logistics Performance of Hospitals

    Directory of Open Access Journals (Sweden)

    Wajong Andre M. R.

    2017-01-01

    Full Text Available Hospitals are institutions in which numerous transactions take place. A significant amount of those transactions happen in the realm of logistics. Logistifics is one of the concern of the hospital’s managing entities. Hospitals must provide a variety of logistics within a limited amount of time. The implementation of hospital logistics indicators were expected to assist the management in improving performance in the logistics units of hospitals in the Province of Jakarta. It was expected that by attending to a number of variables, namely information technology support, logistics management, logistics business intelligence, and logistics performance, such improvement could be achieved. The result of this study provided a description of major indicators that could improve the logistics performance in hospital industry located within the Province of Jakarta. Index Terms: hospital logistics indicator, information technology support, logistics business intelligence, logistic management, logistics performance.

  9. Research on the Logistics Supply Chain in Port Logistics Transportation

    Directory of Open Access Journals (Sweden)

    Wang Yan-liang

    2013-11-01

    Full Text Available The aim of this study is to improve and increase the logistics system effectiveness and to solve the problem of optimal movement of different flows. Logistics transport carrying the world on material resources transfer exchange important mission and economic development and our lives are closely linked, logistics chain logistics transport occupies an important position and in the e logistics chain in port logistics has play a decisive role. For many coastal countries port logistics is the economic lifeline of the country, on China's economic development role as important, port logistics transport bear the material exchange with the external communication of important role, so the Chinese port logistics transportation research, clear port logistics transportation, current situation, find the existing problems in the light of the problem, to find a suitable method for solving has great realistic meaning. To promote logistics development, improve the logistics supply chain system has play an important role in this filed.

  10. 我国电子商务物流模式及选择因素探析%Study on Factors in Selecting Logistics Mode in E-commerce in China

    Institute of Scientific and Technical Information of China (English)

    李伟

    2012-01-01

    In this paper, through analyzing the current status of e-commerce logistics in China, we studied the logistics modes that could be adopted in the development of e-commerce in China and at the end pointed out the factors to be considered when selecting from the modes.%通过分析我国电子商务物流的现状,对当前我国电子商务发展可以选择的物流模式进行分析,最后提出我国电子商务企业进行物流模式选择时所需考虑的因素,以期为我国电子商务企业的发展提供参考.

  11. Multivariate wavelet frames

    CERN Document Server

    Skopina, Maria; Protasov, Vladimir

    2016-01-01

    This book presents a systematic study of multivariate wavelet frames with matrix dilation, in particular, orthogonal and bi-orthogonal bases, which are a special case of frames. Further, it provides algorithmic methods for the construction of dual and tight wavelet frames with a desirable approximation order, namely compactly supported wavelet frames, which are commonly required by engineers. It particularly focuses on methods of constructing them. Wavelet bases and frames are actively used in numerous applications such as audio and graphic signal processing, compression and transmission of information. They are especially useful in image recovery from incomplete observed data due to the redundancy of frame systems. The construction of multivariate wavelet frames, especially bases, with desirable properties remains a challenging problem as although a general scheme of construction is well known, its practical implementation in the multidimensional setting is difficult. Another important feature of wavelet is ...

  12. Multivariate calculus and geometry

    CERN Document Server

    Dineen, Seán

    2014-01-01

    Multivariate calculus can be understood best by combining geometric insight, intuitive arguments, detailed explanations and mathematical reasoning. This textbook has successfully followed this programme. It additionally provides a solid description of the basic concepts, via familiar examples, which are then tested in technically demanding situations. In this new edition the introductory chapter and two of the chapters on the geometry of surfaces have been revised. Some exercises have been replaced and others provided with expanded solutions. Familiarity with partial derivatives and a course in linear algebra are essential prerequisites for readers of this book. Multivariate Calculus and Geometry is aimed primarily at higher level undergraduates in the mathematical sciences. The inclusion of many practical examples involving problems of several variables will appeal to mathematics, science and engineering students.

  13. Multivariate Quantitative Chemical Analysis

    Science.gov (United States)

    Kinchen, David G.; Capezza, Mary

    1995-01-01

    Technique of multivariate quantitative chemical analysis devised for use in determining relative proportions of two components mixed and sprayed together onto object to form thermally insulating foam. Potentially adaptable to other materials, especially in process-monitoring applications in which necessary to know and control critical properties of products via quantitative chemical analyses of products. In addition to chemical composition, also used to determine such physical properties as densities and strengths.

  14. Multivariate $\\alpha$-molecules

    OpenAIRE

    Flinth, Axel; Schäfer, Martin

    2015-01-01

    The suboptimal performance of wavelets with regard to the approximation of multivariate data gave rise to new representation systems, specifically designed for data with anisotropic features. Some prominent examples of these are given by ridgelets, curvelets, and shearlets, to name a few. The great variety of such so-called directional systems motivated the search for a common framework, which unites many under one roof and enables a simultaneous analysis, for example with respect to approxim...

  15. Transient multivariable sensor evaluation

    Energy Technology Data Exchange (ETDEWEB)

    Vilim, Richard B.; Heifetz, Alexander

    2017-02-21

    A method and system for performing transient multivariable sensor evaluation. The method and system includes a computer system for identifying a model form, providing training measurement data, generating a basis vector, monitoring system data from sensor, loading the system data in a non-transient memory, performing an estimation to provide desired data and comparing the system data to the desired data and outputting an alarm for a defective sensor.

  16. Transient multivariable sensor evaluation

    Science.gov (United States)

    Vilim, Richard B.; Heifetz, Alexander

    2017-02-21

    A method and system for performing transient multivariable sensor evaluation. The method and system includes a computer system for identifying a model form, providing training measurement data, generating a basis vector, monitoring system data from sensor, loading the system data in a non-transient memory, performing an estimation to provide desired data and comparing the system data to the desired data and outputting an alarm for a defective sensor.

  17. Multivariate Quantitative Chemical Analysis

    Science.gov (United States)

    Kinchen, David G.; Capezza, Mary

    1995-01-01

    Technique of multivariate quantitative chemical analysis devised for use in determining relative proportions of two components mixed and sprayed together onto object to form thermally insulating foam. Potentially adaptable to other materials, especially in process-monitoring applications in which necessary to know and control critical properties of products via quantitative chemical analyses of products. In addition to chemical composition, also used to determine such physical properties as densities and strengths.

  18. Education in logistics and training of non-logistic personnel

    Directory of Open Access Journals (Sweden)

    Marko D. Andrejić

    2011-01-01

    Full Text Available The significance of education in logistics and education and training of cadets who belong to non-logistic services (non-logistic personnel will be presented. The logistical aspects of education of non-logistic personnel are elaborated as well as the knowledge in the area of logistics which is necessary to be transferred through the educational process to non-logistic personnel for the successful accomplishment of their functional duties. A general approach and the methods of logistics education and improvement of non-logistic personnel are presented as well as the institutional prerequisites necessary for improving the quality of logistics education and training. The quality of the knowledge in this area and its implementation into the methods of thinking and decision making of non-logistic personnel affect the cooperation between the non-logistic and the logistic personnel, directly contributing to the quality of life and working conditions of units and institutions as well as to the quality and synergy in task accomplishments in the framework defined by the missions of the Army of Serbia. The necessary content and means of its transfer to cadets are discussed since they are supposed to be available at all levels and forms of education, depending on the previous cadet education levels. The theoretical bases and experiences shown are of general character and they have a universal application in the process of education. Introduction In our recent defense theory and operational practice, logistics education of non-logistic personnel is not sufficiently analyzed either in organizational or technological aspects, considering the concept and the logic of a systematic and a situational approach. The analysis of the experiences gained from operational practice shows a slight decrease in the quality of task accomplishment due to the lack of necessary logistic knowledge and habits as well as an increased communication gap between logistic and non-logistic

  19. Logistics costs of the enterprise

    OpenAIRE

    Andrea Rosová

    2007-01-01

    The article describe a problem of specification and systematization of enterprise’s logistics costs. With in a growing division of labour, also logistics costs increase their part in enterprises total costs.Almost all decisions about products and production in general, influence logistics processes even logistics costs and performances.In present is not clear enough, which of the cost-particles are relevant fot logistics costs, because some of logistics cost-particles accounts within overhead...

  20. Measures of effectiveness in logistics

    OpenAIRE

    Schrady, David A.

    1989-01-01

    Approved for public release; distribution is unlimited. This report examines measures of effectiveness in naval logistics. Logistics is a warfare support function and it is most desirable to be able to relate resources committed for logistics capabilities to warfare outcomes. In general this cannot be done. Examples of the sorts of measures of effectiveness used in acquisition logistics and in in-service support are given. Battle group logistics, a part of operational logistics, is examine...

  1. Geo-Information Logistical Modeling

    Directory of Open Access Journals (Sweden)

    Nikolaj I. Kovalenko

    2014-11-01

    Full Text Available This paper examines geo-information logistical modeling. The author illustrates the similarities between geo-informatics and logistics in the area of spatial objectives; illustrates that applying geo-data expands the potential of logistics; brings to light geo-information modeling as the basis of logistical modeling; describes the types of geo-information logistical modeling; describes situational geo-information modeling as a variety of geo-information logistical modeling.

  2. Space Station fluid management logistics

    Science.gov (United States)

    Dominick, Sam M.

    1990-01-01

    Viewgraphs and discussion on space station fluid management logistics are presented. Topics covered include: fluid management logistics - issues for Space Station Freedom evolution; current fluid logistics approach; evolution of Space Station Freedom fluid resupply; launch vehicle evolution; ELV logistics system approach; logistics carrier configuration; expendable fluid/propellant carrier description; fluid carrier design concept; logistics carrier orbital operations; carrier operations at space station; summary/status of orbital fluid transfer techniques; Soviet progress tanker system; and Soviet propellant resupply system observations.

  3. Logistic Regression Analysis Using Multiple Risk Factors for Neonatal Hypoglycemia%运用多元Logistic回归模型分析影响新生儿低血糖的危险因素

    Institute of Scientific and Technical Information of China (English)

    宝凌云; 易欣; 高瑾; 胡熙; 杜琨

    2016-01-01

    Objective To explore the risk factors of neonatal hypoglycemia. Methods The clinical data of 340 neonates admitted to our hospital from July 2013 to July 2015 were retrospectively analyzed,grouped according to neonatal blood glucose levels,blood glucose<2.2 mmol/L is defined as low blood sugar,including 32 cases of neonatal hypoglycemia ans 308 normal neonates respectively,using Pearson single factor and multivariate Logistic regression model to analyze the related risk factors of neonatal hypoglycemia. Results In normal newborn infants and neonatal hypoglycemia group the differences of neonatal conditions ( birth weight,premature infants and full-term SGA) ,mother of perinatal situation ( mater-nal age,pregnancy induced hypertension) and neonatal complications (with new respiratory disease,asphyxia,congenital heart disease,hemorrhage disease,infectious disease,hyperbilirubinemia,hypothyroidism) were statistically significant ( P<0.05~0.01);the risk factors of Neonatal hypoglycemia:neonatal birth ( birth weight,premature infants and full-term SGA) , mother of perinatal situation ( maternal age,pregnancy induced hypertension) ,neonatal complications ( neonatal asphyxia, congenital heart disease and hyperbilirubinemia ) . Conclusion Neonatal hypoglycemia related risk factors were birth weight,premature infant and full term small for gestational age, maternal age, pregnancy hypertension, neonatal asphyxia, congenital heart disease,hyperbilirubinemia,controlling these factors can provide scientific basis for the effective prevention of neonatal hypoglycemia.%目的:探讨影响新生儿低血糖的危险因素。方法回顾性分析了2013年7月~2015年7月入住本院的340例新生儿的临床资料,根据新生儿血糖浓度进行分组,将血糖浓度<2.2 mmol/L为低血糖组,其中新生儿低血糖组32例,正常新生儿组308例。分别采用Pearson单因素与多元Logistic回归模型分析影响低血糖新生儿的相关危险因素。结果

  4. Green Maritime Logistics

    DEFF Research Database (Denmark)

    Psaraftis, Harilaos N.

    2014-01-01

    chain management. The traditional analysis of these problems has been in terms of cost- benefit and other optimization criteria from the point of view of the logistics provider, carrier, shipper, or other end-user. Such traditional analysis by and large either ignores environmental issues, or considers......Typical problems in maritime logistics include, among others, optimal ship speed, ship routing and scheduling, fleet deployment, fleet size and mix, weather routing, intermodal network design, modal split, transshipment, queuing at ports, terminal management, berth allocation, and total supply...... them of secondary importance. Green maritime logistics tries to bring the environmental dimension into the problem, and specifically the dimension of emissions reduction, by analyzing various trade-offs and exploring ‘win-win’ solutions. This talk takes a look at the trade-offs that are at stake...

  5. Efficiency and Logistics

    CERN Document Server

    Hompel, Michael; Klumpp, Matthias

    2013-01-01

    The „EffizienzCluster LogistikRuhr“ was a winner in the Leading Edge Science Cluster competition run by the German federal Ministry of Education and Research. The mission and aim of the „EffizienzCluster LogistikRuhr“ is to facilitate tomorrow’s individuality – in the sense of individual goods supply, mobility, and production – using 75 percent of today’s resources. Efficiency – both in economical and ecological terms – is enabled by state-of-the-art and innovative logistical solutions including transportation, production and intralogistics. These proceedings “Efficiency and Logistics” give first answers from 27 research projects as an insight into the current state of research of Europe’s leading research and development cluster in logistics and as a contribution to the discussion on how logistics as a science can help to cope with foreseeable resource shortage and sustainability as global challenges.

  6. Logistics innovation development

    DEFF Research Database (Denmark)

    Pedrosa, Alex; Blazevic, Vera; Jasmand, Claudia

    2015-01-01

    illustrate that boundary-spanning employees are well advised to concentrate on either deepening or broadening their customer knowledge in a single stage of the logistics innovation development process but switch between these two knowledge acquisition approaches from stage-to-stage to leverage customer...... about customers for the development of innovations. Design/methodology/approach — Qualitative research based on multiple semi-structured interviews with boundary-spanning employees of six logistics service providers was conducted to explore the deepening and broadening of customer knowledge during...... knowledge throughout the logistics innovation development process. Yet, the specific sequence depends on the type of innovation developed (customized versus standardized). Customer knowledge tends to be deepened in one-on-one interactions, while knowledge tends to be broadened in interactions with numerous...

  7. Logistic regression analysis of risk factors of affecting first time chemotherapy result in children with acute lymphocytic leukemia%影响急性淋巴细胞白血病患儿首次化疗效果的Logistic多因素回归分析

    Institute of Scientific and Technical Information of China (English)

    张耀东; 熊昊; 张小玲; 谭利娜; 胡群; 刘双又; 张柳清; 刘爱国; 孙燕

    2011-01-01

    目的:探讨影响儿童急性淋巴细胞白血病(ALL)首次化疗结果的因素分析为临床治疗提供依据.方法:对华中科技大学同济医学院附属同济医院儿科139例ALL患儿首次化疗的有关指标与化疗效果(完全缓解或非完全缓解)的关系进行单因素和Logistic多因素分析.结果:单因素结果提示除年龄及外周血白细胞计数与首次化疗CR有关,其余各项变量均与首次化疗CR无关.Logistic多因素分析显示,外周血白细胞计数(OR=-0.636,95%CI为0.30~0.95,P=0.003)是导致儿童ALL首次化疗非完全缓解的主要危险因素.结论:对于伴外用血高白细胞的儿童ALL,其首次化疗完全缓解率较低,应引起医师的高度重视.%Objective To investigate the risk factors of complete remission of childhood acute lymphoblastic leukemia (ALL) during the first time chemotherapy, so as to provide theoretical evidence for clinical treatment. Methods Totally 139 children with ALL, who were treated in our hospital during Jan. 2000 to July 2009, were included in the present study.The relations between related indices of the first time chemotherapy and complete remission were analyzed by univariate and multivariate analysis. Results Single-factor analysis showed that the age of patients and peripheral white blood cell count were the risk factors, Multivariate Logistic regression analysis showed peripheral blood white blood cell count was the main risk factor (OR = -0.636, 95% CI = 0.30-0.95 ,P = 0.003). Conclusions High peripheral blood white blood cell count level was a risk factor of complete remission in childhood ALL which should be cared.

  8. Socio-Economic Factors Affecting Adoption of Modern Information and Communication Technology by Farmers in India: Analysis Using Multivariate Probit Model

    Science.gov (United States)

    Mittal, Surabhi; Mehar, Mamta

    2016-01-01

    Purpose: The paper analyzes factors that affect the likelihood of adoption of different agriculture-related information sources by farmers. Design/Methodology/Approach: The paper links the theoretical understanding of the existing multiple sources of information that farmers use, with the empirical model to analyze the factors that affect the…

  9. Logistics in Namibia: Issues and challenges

    Directory of Open Access Journals (Sweden)

    Christopher J. Savage

    2013-05-01

    Full Text Available Logistics is perceived to be important for Namibia’s growth and development, but this may be a matter of conjecture as there is a dearth of documented information about the industry in Namibia. Furthermore, it is uncertain what the understanding of logistics is for key stakeholders in the country. This article reports on a project; the objectives were to address some of these issues and to lay the foundation for a more thorough investigation in the future. The findings of the initial project were disseminated in 2012 by: a conference paper showing the challenges and opportunities facing logistics in Namibia in 2012; a report; and through a Logistics and Transport Workshop held in Walvis Bay, Namibia in September 2012. These reports, additional interviews and subsequent discussions highlighted some potential opportunities and problems. This article summarises the project to date, showing the methodology and findings as updated by subsequent feedback and further interviews. The findings from key stakeholders of the logistics industry in Namibia include: universal agreement on the importance of logistics to Namibia; the variety in the understanding of the term logistics; the strength of the continuing influence of South Africa as the dominant economic power in southern Africa; and contrasting views on the main factors limiting logistics development, including infrastructure, attitude, government, customs, training, railways, corruption and driver shortage.

  10. Comparison of Multidimensional Item Response Models: Multivariate Normal Ability Distributions versus Multivariate Polytomous Ability Distributions. Research Report. ETS RR-08-45

    Science.gov (United States)

    Haberman, Shelby J.; von Davier, Matthias; Lee, Yi-Hsuan

    2008-01-01

    Multidimensional item response models can be based on multivariate normal ability distributions or on multivariate polytomous ability distributions. For the case of simple structure in which each item corresponds to a unique dimension of the ability vector, some applications of the two-parameter logistic model to empirical data are employed to…

  11. Analysis on risk factors of fungal rhinosinusitis onset by Logistic regression%真菌性鼻-鼻窦炎发病危险因素Logistic回归分析

    Institute of Scientific and Technical Information of China (English)

    杨欣; 蒋代华; 莫兰

    2015-01-01

    ObjectiveTo investigate the risk factors and clinical features of fungal rhinosinusitis. MethodThe preoperative clinical data of the fungal rhinosinusitis and chronic rhinosinusitis patients in our hospital from April 2012 to May 2014 were given a case-control study, and were analyzed by univariate and multivariate Logistic regression.ResultThe difference of age and duration of the two groups were significant (P0.05); the two groups of patients with nasal congestion, runny nose, epistaxis, nasal purulent secretions and new biological proportion of the difference were signiifcant (P0.05). There were signiifcant differences in calciifcation spots, the proportion of unilateral sinus lesions of CT between the two groups (P0.05). The independent risk factors of fungal rhinosinusitis were age, blood cried, calciifcation spots of CT and unilateral sinus lesions, The regression prediction equation was Y=-7.32+1.14X1+4.12X8+4.53X14+2.95X15. TheOR values of blood cried, calciifcation spots of CT and unilateral sinus lesions were far over 1, so the three factors were the strong correlation factors of fungal rhinosinusitis. Histological examination showed that among 54 cases of fungal rhinosinusitiss patients, 16 cases were chronic invasive, 38 cases were noninvasive.ConclusionOver the age of 40 years old, cried blood, calciifcation spots of CT and unilateral sinus lesions are the independent risk factors of fungal rhinosinusitiss, and can be forecasted through the relevant regression equation.%目的:探讨真菌性鼻-鼻窦炎发病的相关因素和临床特征。方法选取2012年4月至2014年5月本院收治的确诊为真菌性鼻-鼻窦炎的患者与同期确诊的慢性鼻-鼻窦炎患者的术前临床资料进行病例对照研究,并进行单因素及多因素Logistic回归分析。结果两组患者年龄、病程比较差异具有显著性(P<0.05),真菌性鼻-鼻窦炎好发于≥40岁年龄段,病程一般<3年。两组患

  12. 消化道肿瘤患者化疗后感染危险因素logistic回归分析%Logistic regression analysis of risk factors for infections in patients with gastrointestinal cancer after chemotherapy

    Institute of Scientific and Technical Information of China (English)

    张春珍; 牛春莲; 张艳芳; 夏金; 王保吉; 李江丽

    2016-01-01

    OBJECTIVE To explore the related risk factors for infections and pathogens distribution in patients with gastrointestinal cancer after chemotherapy ,so as to provide evidence for reducing the infection rate .METHODS A total of 1000 patients with gastrointestinal cancer who undertook chemotherapy from Feb .2013 to Mar .2015 in the hospital were collected .The infection sites ,pathogen distribution and related risk factors of infections in pa-tients with gastrointestinal cancer after chemotherapy were analyzed .The results were analyzed by SPSS 19 .0 software for statistical analysis .RESULTS There were 98 infected patients after chemotherapy among 1000 pa-tients with gastrointestinal cancer ,and the infection rate was 9 .80% .The main site of infection was the respirato-ry system ,urinary system and digestive tract ,which accounted for 56 .12% ,20 .41% and 13 .27% ,respectively . There were 76 pathogens detected in 98 patients with infections ,including gram-negative bacteria ,gram-positive bacteria and fungi ,which accounted for 60 .53% ,23 .68% and 15 .79% ,respectively .Multivariate logistic re-gression analysis showed that :aging ,the long hospital stay ,low albumin bias ,prophylactic use of antimicrobial drugs merged radiotherapy and advanced tumors were independent risk factors for infections in patients with gas-trointestinal cancer after chemotherapy (P<0 .05) .CONCLUSION The results show that the infected pathogens in patients with gastrointestinal cancer after chemotherapy was mainly gram-negative bacteria .There are many infec-tion related risk factors :aging ,long hospital stay ,low albumin ,prophylactic use of antimicrobial drugs ,advanced cancer are independent risk factors of infections in patients with gastrointestinal cancer after chemotherapy .%目的 探讨消化道肿瘤患者化疗后医院感染病原菌分布与相关危险因素,为降低消化道肿瘤患者化疗后医院感染率提供依据.方法 收集医院2013年2月-2015年3

  13. Factors associated with oxyhemoglobin desaturation during rapid sequence intubation in a pediatric emergency department: findings from multivariable analyses of video review data.

    Science.gov (United States)

    Rinderknecht, Andrea S; Mittiga, Matthew R; Meinzen-Derr, Jareen; Geis, Gary L; Kerrey, Benjamin T

    2015-04-01

    In a video-based study of rapid sequence intubation (RSI) in a pediatric emergency department (PED), 33% of children experienced oxyhemoglobin desaturation (SpO2 performance of key RSI process elements uniquely available from video review) associated with desaturation during pediatric RSI. These were planned analyses of data collected during a retrospective, video-based study of RSI in a high-volume, academic PED. For variables with plausible associations with desaturation, multiple logistic regression and generalized estimating equations were used to identify those characteristics independently associated with desaturation at both the patient and the attempt levels. The authors analyzed video data from 114 patients undergoing RSI over 12 months. Desaturation was more common in patients 24 months of age and younger (59%) than in patients older than 24 months of age (10%). Variables associated with desaturation in patients 24 months of age and younger were duration of attempts (both individual and cumulative), the occurrence of esophageal intubation, a respiratory indication for intubation, and young age. The receiver operating characteristics curve for the model had an area under the curve of 0.80 (95% confidence interval [CI] = 0.67 to 0.92). Forty-six percent of desaturations occurred after 45 seconds of laryngoscopy, and 82% after 30 seconds. The odds ratio for desaturation on individual attempts lasting longer than 30 seconds (vs. those 30 seconds or less) was 5.7 (95% CI = 2.26 to 14.36). For children 24 months of age or younger undergoing RSI in a PED, respiratory indication for intubation, esophageal intubation, and duration of laryngoscopy (both individual and cumulative) were associated with desaturation; the number of attempts was not. Interventions to limit attempt duration in the youngest children may improve the safety of RSI. © 2015 by the Society for Academic Emergency Medicine.

  14. 老年病人胃癌术后肺部感染的危险因素分析及护理对策%Logistic Regression Analysis of Risk Factors on Elderly Patients with Lung Infection after Gastric Canc-er Surgery and Nursing Countermeasure

    Institute of Scientific and Technical Information of China (English)

    杨俊华

    2015-01-01

    目的:通过:logistic回归分析,了解老年胃癌病人行外科手术治疗后并发肺部感染的危险因素及护理对策,并且针对危险因素进行干预。方法收集280例老年胃癌术后患者的基础信息及临床资料,发生肺部感染的患者60例,未发生肺部感染的220例,观察患者的年龄、性别、是否有吸烟史、是否有基础疾病,是否采用持续性胃肠减压,是否早起下床活动,术后是否常规采用抗生素治疗,以非条件logistic回归分析方法分析相关的危险因素。结果在单因素的logistic回归分析中,患者是否>65岁,是否吸烟,是否使用胃肠减压,是否早起下床活动是危险因素5个因素具有统计学意义( P<0.05);多因素分析得到是否吸烟,是否胃肠减压为老年胃癌肺部感染的危险因素,而是否早期下床活动为保护性因素。结论伴有术后胃肠减压患者及是否有吸烟史的患者胃癌术后患者容易出现肺部感染,需高度重视,而早期下床活动则是保护性措施。%Objective The logistic regression was used to analysis the elderly patients with lung infection after gastric cancer surgery and nursing countermeasure and special intervention against the risk factors.Methods 280 patients after gastric cancer surgery was included,60 patients with lung infection, their information and clinical data including age, gender, history of smoking, underlying disease, persistent decompression, early ambulation and antibiotic therapy after surgery were collected and subjected to non-conditional logistic regression analysis.Results Single logistic regression showed the age >65, smoking, persistent decompression and early ambulation were risk factors, and smoking, persistent decompression were risk factors,but early ambulation was protective factors in the multivariate logistic regression analy-sis.Conclusions The patients with smoking and persistent decompression

  15. MANAGING INNOVATION PROJECTS USING DISTRIBUTION LOGISTICS

    Directory of Open Access Journals (Sweden)

    Erika Loučanová

    2015-12-01

    Full Text Available A significant part of innovation projects management is the distribution logistics. From the point of view of time and material content, the properly chosen way of distribution is one of many factors for success of the project and innovation creation itself. The paper points out the fundamental basis of innovation management in the stage of its realization referring to the importance of distribution logistics in this part of innovation project management. Distribution logistics in the project management provides comprehensive solutions to efficiency of tangible relocating processes in all connections and mutual relations of project in order to maintain compliance between economy and business when implementing innovations.

  16. The Differences and Its Influencing Factors of Logistics Development of Central Cities in China%中国主要城市物流业发展的差异及影响因素

    Institute of Scientific and Technical Information of China (English)

    谢守红; 王平

    2016-01-01

    选取我国35个中心城市,对其在2002-2011 年间的物流业发展差异进行时空演变分析,并将其划分为物流发达城市、物流较发达城市、物流欠发达城市、物流不发达城市4种类型. 结果表明,城市之间物流业发展差异显著,东部地区物流业发展水平遥遥领先于中西部地区,但近10年来中西部地区物流业发展步伐加快,与东部地区的差距有所缩小. 文章对2002-2011年我国物流业发展与经济增长之间的关系进行了实证分析. 研究表明:经济增长要素与我国物流业具有高度相关性,对物流业发展产生正向推动作用,但存在一定的滞后性,影响程度由高到低依次为消费水平、经济发展水平、人力资源、资本投入、工业发展水平、对外开放程度,以上6个要素每增长1%,物流业产值就依次上升0.710 3%、0.703 7%、0.657 4%、0.642 9%、0 .540 7%、0 .353 3%.%The paper selected 35 central cities in China and analysed spatial-temporal evolution of logis-tics development from 2002 to 2011 .The central cities were divided into four types in terms of the logistics de-velopment:developed cities , more developed cities , less developed cities and underdeveloped cities .The re-sults indicate that there are significant differences among cities , and the polarization has been increased .Lo-gistics development in the eastern regions is well ahead of that of the midwest , but the midwest accelerated their steps of logistics development in the past ten years , and the gap has been narrowed .The paper also made an empirical analysis of the relationship between logistics industry development and economic growth in China from 2002 to 2011 .The results show that there is a high correlation between economic growth factors and the logistics industry .The economic growth factors have a positive role in promoting logistics industry develop-ment, but with a certain lag.The impacts from high to low are the consumption

  17. Selected Tools for Risk Analysis in Logistics Processes

    Science.gov (United States)

    Kulińska, Ewa

    2012-03-01

    As each organization aims at managing effective logistics processes, risk factors can and should be controlled through proper system of risk management. Implementation of complex approach to risk management allows for the following: - evaluation of significant risk groups associated with logistics processes implementation, - composition of integrated strategies of risk management, - composition of tools for risk analysis in logistics processes.

  18. A Logistics Revolution

    Institute of Scientific and Technical Information of China (English)

    2006-01-01

    The entry of international industry leaders is stirring up profound logistics changes in China After 23 rounds of negotiations in the past two years. FedEx's first transit center in China is to be built in the Guangzhou Baiyun International Airport soon.

  19. Logistics innovation development

    DEFF Research Database (Denmark)

    Pedrosa, Alex; Blazevic, Vera; Jasmand, Claudia

    2015-01-01

    about customers for the development of innovations. Design/methodology/approach — Qualitative research based on multiple semi-structured interviews with boundary-spanning employees of six logistics service providers was conducted to explore the deepening and broadening of customer knowledge during...

  20. Logistics Services Communication

    CERN Multimedia

    2006-01-01

    Members of the personnel are invited to take note that only parcels corresponding to official orders or contracts will be handled at CERN. Individuals are not authorised to have private merchandise delivered to them at CERN and private deliveries will not be accepted by the Goods Reception services. Thank you for your understanding. Logistics Services - FI Department - 79947

  1. Logistics Services Communication

    CERN Multimedia

    2006-01-01

    Members of the personnel are invited to take note that only parcels corresponding to official orders or contracts will be handled at CERN. Individuals are not authorisedto have private merchandise delivered to them at CERN and private deliveries will not be accepted by the Goods Reception services. Thank you for your understanding. Logistics Services - FI Department - 79947

  2. Bonded+ Logistics=?

    Institute of Scientific and Technical Information of China (English)

    WangBin

    2004-01-01

    Could “bonded” and “lo gistics” be effectively related?This concerns not only the future development of its port logistics but also points out in real practice a new way of system transformation for the Chinese bonded areas.And it is with such questions in mind

  3. Maritime logistics: contemporary issues

    National Research Council Canada - National Science Library

    Song, D.W; Panayides, P.M

    2012-01-01

    ... in business and for study and research. This book is the first of its kind, adopting the innovative approach of dealing with the overlap between shipping, ports and logistics and covering the current issues having a significant impact on the industry...

  4. Multivariate respiratory motion prediction

    Science.gov (United States)

    Dürichen, R.; Wissel, T.; Ernst, F.; Schlaefer, A.; Schweikard, A.

    2014-10-01

    In extracranial robotic radiotherapy, tumour motion is compensated by tracking external and internal surrogates. To compensate system specific time delays, time series prediction of the external optical surrogates is used. We investigate whether the prediction accuracy can be increased by expanding the current clinical setup by an accelerometer, a strain belt and a flow sensor. Four previously published prediction algorithms are adapted to multivariate inputs—normalized least mean squares (nLMS), wavelet-based least mean squares (wLMS), support vector regression (SVR) and relevance vector machines (RVM)—and evaluated for three different prediction horizons. The measurement involves 18 subjects and consists of two phases, focusing on long term trends (M1) and breathing artefacts (M2). To select the most relevant and least redundant sensors, a sequential forward selection (SFS) method is proposed. Using a multivariate setting, the results show that the clinically used nLMS algorithm is susceptible to large outliers. In the case of irregular breathing (M2), the mean root mean square error (RMSE) of a univariate nLMS algorithm is 0.66 mm and can be decreased to 0.46 mm by a multivariate RVM model (best algorithm on average). To investigate the full potential of this approach, the optimal sensor combination was also estimated on the complete test set. The results indicate that a further decrease in RMSE is possible for RVM (to 0.42 mm). This motivates further research about sensor selection methods. Besides the optical surrogates, the sensors most frequently selected by the algorithms are the accelerometer and the strain belt. These sensors could be easily integrated in the current clinical setup and would allow a more precise motion compensation.

  5. Multivariate Statistical Process Control

    DEFF Research Database (Denmark)

    Kulahci, Murat

    2013-01-01

    As sensor and computer technology continues to improve, it becomes a normal occurrence that we confront with high dimensional data sets. As in many areas of industrial statistics, this brings forth various challenges in statistical process control (SPC) and monitoring for which the aim...... is to identify “out-of-control” state of a process using control charts in order to reduce the excessive variation caused by so-called assignable causes. In practice, the most common method of monitoring multivariate data is through a statistic akin to the Hotelling’s T2. For high dimensional data with excessive...

  6. The use of logistic regression to enhance risk assessment and decision making by mental health administrators.

    Science.gov (United States)

    Menditto, Anthony A; Linhorst, Donald M; Coleman, James C; Beck, Niels C

    2006-04-01

    Development of policies and procedures to contend with the risks presented by elopement, aggression, and suicidal behaviors are long-standing challenges for mental health administrators. Guidance in making such judgments can be obtained through the use of a multivariate statistical technique known as logistic regression. This procedure can be used to develop a predictive equation that is mathematically formulated to use the best combination of predictors, rather than considering just one factor at a time. This paper presents an overview of logistic regression and its utility in mental health administrative decision making. A case example of its application is presented using data on elopements from Missouri's long-term state psychiatric hospitals. Ultimately, the use of statistical prediction analyses tempered with differential qualitative weighting of classification errors can augment decision-making processes in a manner that provides guidance and flexibility while wrestling with the complex problem of risk assessment and decision making.

  7. 退役家电逆向物流渠道激励的因素与模式%Factors and Mode of Reverse Logistics Incentive Channel of Retired Home Appliances

    Institute of Scientific and Technical Information of China (English)

    何敏; 邓梅玲

    2016-01-01

    This paper explores the incentive factors and mode of the reverse logistics of the retired electrical appli-ance products which is the inevitable requirement to improve the reuse efficiency and reduce the environmental pol-lution. Through the analysis of the main components and channel control factors of the reverse logistics, the incentive mechanism and mode selection of the two aspects of the incentive mechanism and the mode of the reverse logistics of the home appliance are proposed. Analysis shows that in the current environment, the effective way is to take the eco-nomic incentive and non economic incentive to strengthen the reverse logistics, to regulate the behavior of the various channels of the retirement home appliance reverse logistics, and provide a good policy support for the retirement home appliance recycling, disposal, assessment, and then consumption.%探索退役家电产品逆向物流渠道激励因素与模式是提高废旧物资再利用效率和降低环境污染的必然要求。通过分析退役家电逆向物流的主体构成和渠道制约因素,从退役家电逆向物流渠道激励机制与模式两方面针对性提出激励策略和模式选择。分析表明在当前环境下,退役家电逆向物流激励的有效方式是采取经济激励和非经济激励予以强化,达到规范退役家电逆向物流各个渠道成员行为以及为退役家电回收、处置、评估、再消费等系列活动提供良好策略保障的目的。

  8. Studies on Logistics and Logistics Technology of China

    Institute of Scientific and Technical Information of China (English)

    LuoYixin

    2005-01-01

    For further pushing ahead with the development of China's logistics industry, the author, based on the status quo of China's logistics industry, affirms the achievements made in the development course of the industry of China. By studying various respects of the industry including the understanding of logistics, standards of technical terms, logistics technologies and management, the author analyzes the major problems existence in China's current logistics industry and puts forward the rationalization proposal.

  9. An Integrated and Multivariate Model along with Designing Experiments Approach for Assessment of Micro- and Macro- Ergonomic Factors: The Case of a Gas Refinery.

    Science.gov (United States)

    Azadeh, A; Mohammadfam, I; Sadjadi, M; Hamidi, Y; Kianfar, A

    2008-12-28

    The objectives of this paper are three folds. First, an integrated framework for designing and development of the integrated health, safety and environment (HSE) model is presented. Second, it is implemented and tested for a large gas refinery in Iran. Third, it is shown whether the total ergonomics model is superior to the conventional ergonomics approach. This study is among the first to examine total ergonomics components in a manufacturing system. This study was conducted in Sarkhoon & Qeshm Gas refinery- Iran in 2006. To achieve the above objectives, an integrated approach based on total ergonomics factors was developed. Second, it is applied to the refinery and the advantages of total ergonomics approach are discussed. Third, the impacts of total ergonomics factors on local factors are examined through non-parametric statistical analysis. It was shown that total ergonomics model is much more beneficial than conventional approach. It should be noted that the traditional ergonomics methodology is not capable of locating the findings of total ergonomics model. The distinguished aspect of this study is the employment of a total system approach based on integration of the conventional ergonomics factors with HSE factors.

  10. Multiple Factors Logistic Regression Analysis on the Basic Syndromes Related Factors in Patients with Chronic Prostatitis%慢性前列腺炎基本证型相关因素多元逐步Logistic回归分析

    Institute of Scientific and Technical Information of China (English)

    李兰群; 张强; 李海松; 郭军; 孙松; 邢建民; 周强; 谢春雨; 杨杰; 王彬

    2011-01-01

    目的 探讨慢性前列腺炎基本证型的相关因素.方法 制定调查表,在北京3家医院的中医男科收集慢性前列腺炎连续病例,采用Epidata 3.02建立数据库,SPSS 17.0软件统计分析,对基本证型的可能相关因素分别进行单因素和多因素Logistic回归分析.结果 从事脑力工种为湿热下注证的主要危险因素;西医分类ⅢA型、从事脑力和体力工种、工作时间≤8 h为气滞血瘀证的主要危险因素;病程12个月、居住不舒适、不饮用刺激性饮料、消化不良为肝气郁结证的主要危险因素;年龄增大、工作压力减小、冬季发病为肾阳虚损证的主要危险因素.结论 年龄、病程、西医分类、工种、工作时间、工作压力、发病季节、居住舒适度、消化不良和饮用刺激性饮料等因素与慢性前列腺炎基本证型有关.%Objective To explore the basic syndrome related factors in patients with chronic prostatitis (CP).Methods Using questionnaire to collect data of CP patients from three hospitals in Beijing, Epidata 3.02 to establish database, the uni-variate and multiple Logistic regression analysis was performed with SPSS 17.0 software to determine the basic syndrome related factors.Results Engagement in brainwork was the main risk factor for suffering from dampness-heat downward-flow syndrome; CP of type Ⅲ A (classified by Western medicine), employed on brainwork or physical work, and working time ≤ 8 h were risk factors for suffering from qi-stagnancy and blood-stasis syndrome; illness duration > 12 months, uncomfortable habitat, dislike for irritative beverages and poor digestive function were risk factors for Gan-qi stagnation syndrome; and aging, decreased burden from work, winter onset of the illness were those for Shen-yang deficiency syndrome.Conclusions The basic syndrome related factors in patients with CP are age of patient, duration and type of illness, occupational type, daily working time, burden

  11. Transformation - Revolution in Military Logistics

    Science.gov (United States)

    2007-11-02

    adopted by the logistics community as part of the Army’s Revolution in Military Logistics ....operations." To support this vision, Army logistics requires a quantum leap in strategic responsiveness. This change is called "Revolution in Military ... Logistics ," to know what the customer, the Warfighter, needs before he requests it. This study examines proposed improvements in automation

  12. Logistics costs of the enterprise

    Directory of Open Access Journals (Sweden)

    Andrea Rosová

    2007-06-01

    Full Text Available The article describe a problem of specification and systematization of enterprise’s logistics costs. With in a growing division of labour, also logistics costs increase their part in enterprises total costs.Almost all decisions about products and production in general, influence logistics processes even logistics costs and performances.In present is not clear enough, which of the cost-particles are relevant fot logistics costs, because some of logistics cost-particles accounts within overhead are charged together with costs of other sorts.Substantive step in the process of the monitoring and evidence of logistics costs is definition of this, that costs of enterprise´s processes will be inclusive in logistics costs and determining points of contact with the others departments (acquisition, production, sale etc.. After the specification of meditation processes, there is a need to choose applicable parameters for the expression of logistics performances. Besides logistics costs is needed to know logistics performances equivalent herewith at a cost of, therefore from the control side have for enterprise bigger value indices expressive correlation costs and performances(e.g. share of logistics unit costs performance.At the proposal and evidence of logistics costs and performances is needed consistently entertain an individual conditions of enterprise. Because the area of processes included strongly affects the size of account logistics costs and its share part in total costs of enterprise. Logistics costs are flow line between economy and logistics of the enterprise.

  13. Olympic Effect on Beijing Logistics

    Institute of Scientific and Technical Information of China (English)

    Guo Liqin

    2008-01-01

    @@ Olympic logistics network as preparationIn 2003, the Beijing municipal government proposed the blueprint for three key logistics projects for the 2008 Olympics. It planned to build three logistics bases (at Yancun in Fangshan District, Majuqiao in Tongzhou, and Shahe in Changping District) along with four logistics centers (at Tianzhu in Chaoyang, Shibajiadian in Chaoyang, Dazhuang in Daxing, and Mentougou).

  14. Can the Five Factor Model of Personality Account for the Variability of Autism Symptom Expression? Multivariate Approaches to Behavioral Phenotyping in Adult Autism Spectrum Disorder

    Science.gov (United States)

    Schwartzman, Benjamin C.; Wood, Jeffrey J.; Kapp, Steven K.

    2016-01-01

    The present study aimed to: determine the extent to which the five factor model of personality (FFM) accounts for variability in autism spectrum disorder (ASD) symptomatology in adults, examine differences in average FFM personality traits of adults with and without ASD and identify distinct behavioral phenotypes within ASD. Adults (N = 828;…

  15. Can the Five Factor Model of Personality Account for the Variability of Autism Symptom Expression? Multivariate Approaches to Behavioral Phenotyping in Adult Autism Spectrum Disorder

    Science.gov (United States)

    Schwartzman, Benjamin C.; Wood, Jeffrey J.; Kapp, Steven K.

    2016-01-01

    The present study aimed to: determine the extent to which the five factor model of personality (FFM) accounts for variability in autism spectrum disorder (ASD) symptomatology in adults, examine differences in average FFM personality traits of adults with and without ASD and identify distinct behavioral phenotypes within ASD. Adults (N = 828;…

  16. Approximation by Multivariate Singular Integrals

    CERN Document Server

    Anastassiou, George A

    2011-01-01

    Approximation by Multivariate Singular Integrals is the first monograph to illustrate the approximation of multivariate singular integrals to the identity-unit operator. The basic approximation properties of the general multivariate singular integral operators is presented quantitatively, particularly special cases such as the multivariate Picard, Gauss-Weierstrass, Poisson-Cauchy and trigonometric singular integral operators are examined thoroughly. This book studies the rate of convergence of these operators to the unit operator as well as the related simultaneous approximation. The last cha

  17. 产后出血4280例相关因素分析%Univariate and multivariate analysis of postpartum hemorrhage associated factors

    Institute of Scientific and Technical Information of China (English)

    呼改琴; 黑江荣

    2014-01-01

    Objective :To analyze the related factors of postpartum hemorrhage .Methods :Statistical a-nalysis of 4280 cases of maternal age ,parity ,parity ,gestational age ,mode of delivery ,placenta previa ,placental abruption ,placenta accreta /implant /retention ,uterine inertia ,soft birth canal injury ,coagulation disorders and pregnancy high blood pressure and other factors of the relationship between postpartum hemorrhage .Results :The effects of differences in age ,parity ,parity ,gestational age ,mode of delivery and other factors of postpartum hem-orrhage was not statistically significant ;placenta previa ,placental abruption ,placenta accreta /implant /retention , uterine inertia ,impact of differences in soft birth canal injury ,coagulation disorders and pregnancy history of hyper-tension and other factors of postpartum hemorrhage was statistically significant .Conclusion:uterine inertia ,placen-ta accreta /implant /retention factors ,placenta previa ,placental abruption ,the soft birth canal injury is a risk factor for postpartum hemorrhage .%目的:分析产妇产后出血相关因素。方法:统计分析4280例产妇年龄、胎次、产次、孕周、分娩方式、前置胎盘、胎盘粘连或植入、子宫收缩乏力、软产道损伤、凝血功能障碍和妊娠高血压等因素与产后出血量的关系。结果:年龄、胎次、产次、孕周、分娩方式等因素的差别对产后出血量的影响没有统计学意义;前置胎盘、胎盘早剥、胎盘粘连或植入、子宫收缩乏力、软产道损伤、有凝血功能障碍和妊娠高血压史等因素的差别对产后出血量的影响有统计学意义。结论:子宫收缩乏力、胎盘粘连或植入、前置胎盘、胎盘早期剥离、软产道损伤等因素是产后出血的高危因素。

  18. A Multivariate Analysis of Preoperative Risk Factors Associate with Postoperative Pneumonia among Elderly Patients with Abdominal Surgery and Nursing%老年患者腹部手术后肺炎的术前危险因素研究及护理对策

    Institute of Scientific and Technical Information of China (English)

    董明; 李大鹏; 张建斌

    2014-01-01

    目的:探讨影响老年患者腹部手术后肺部感染的术前危险因素及护理对策。方法:回顾性收集2013年6月-2013年12月期间行腹部手术的107例患者的临床资料,根据患者术后至出院期间是否发生肺部感染分为感染组和对照组。对可能影响患者术后肺部感染的术前危险因素进行多因素Logistic回归分析。结果:107例患者发生肺部感染的患者19例(17.76%),未发生肺部感染的患者88例。(1)单因素结果显示:对照组患者年龄、BM I值、血浆白蛋白值、FEV1和肺活量值大于感染组患者,且差异有统计学意义( P<0.05)。感染组和对照组患者的性别、术前X射线情况、高血压、脑血管疾病、糖尿病和消化系统疾病分布没有差异(P>0.05);而感染组患者中吸烟、COPD/哮喘和冠心病的比例高于对照组患者的比例,且差异有统计学意义(P<0.05)。(2)多因素Logistic回归结果显示:年龄、吸烟、FEV1、血浆白蛋白和合并COPD/哮喘是老年患者腹部手术后肺部感染的独立危险因素。结论:年龄、吸烟和合并COPD/哮喘可以增加术后肺部感染的风险,而FEV1和血浆白蛋白含量的提高可以降低术后肺部感染的风险。%Objective :To explore the possible preoperative risk factors associate with postoperative pneumonia among elderly patients with abdominal surgery and then propose appropriate nursing advice .Methods :A total of 107 elderly patients who would undergo abdominal surgery were selected .Patients were divided into infection group and control group according to postoperative occurrence of pneumonia .Preoperative risk factors were analyzed by multivariable lo-gistic regression model .Results:Postoperative pneumonia was observed among 19 patients (17 .76% ) .(1)Single factor analysis showed that age ,BMI ,plasma albumin ,FEV1 and FVC in control group are greater than those in infection

  19. Univariate and multivariate analysis of risk factors for severe clostridium difficile-associated diarrhoea Importance of co-morbidity and serum C-reactive protein

    Institute of Scientific and Technical Information of China (English)

    2008-01-01

    AIM: To investigate risk factors for severe clostridium difficile associated diarrhoea (CDAD) in hospitalised patients. METHODS: We analysed risk factors for severe CDAD (associated with systemic signs of hypovolemia) in 124 hospitalised patients by retrospective chart review. RESULTS: Severe CDAD was present in 27 patients (22%). Statistical analysis showed a significant association with a higher 30-d mortality (33% vs 4%, P < 0.001) and a higher proportion of longer hospital stay exceeding 14 d (74% vs 52%, P = 0.048). Charlson co-morbidity score (OR 1.29 for 1 point increment, P < 0.05) and serum C-reactive protein at diagnosis (OR 1.15 for 10 mg/L increment, P <0.001) were independent predictors of severe CDAD. CONCLUSION: Patients with a severe level of co- morbidity and high serum C-reactive protein levels at the time of diagnosis should receive particular attention.

  20. 高血压性脑出血患者术后抑郁危险因素的Logistic回归分析%Logistic regression analysis of risk factors of depression in patients with hypertensive cerebral hemorrhage after opera- tion

    Institute of Scientific and Technical Information of China (English)

    陈莉; 吕建国; 陈仕芬; 徐文斌

    2015-01-01

    目的:探讨高血压性脑出血患者术后抑郁的危险因素,为其早期预防提供依据。方法对266例高血压性脑出血患者进行了系统性的调查分析,对可能是导致其抑郁的危险因素进行了 Logistic 回归分析。结果266例患者中有91例出现了抑郁,发病率为34.2%。通过 Logistic 回归分析发现:性格、脑出血程度、家庭经济情况和文化程度等是高血压性脑出血患者术后抑郁的独立危险因素。结论高血压性脑出血患者术后抑郁症的发病率较高,早期干预可降低抑郁症的发病率。%Objective To explore the risk factors related to depression in patients with hypertensive cerebral hemorrhage after operation,and to provide the basis for the prevention.Methods For 266 cases of hypertensive cerebral hemorrhage patients,a systematic investigation and analysis,in view of depression as a risk factor,were analyzed by logistic regression analysis.Results In 266 cases,91 cases appeared depression,and the incidence rate was 34.2%.Through Logistic regression analysis,we found that:character,the degree of cerebral hemorrhage, family economic conditions and cultural level are risk factors for depression of hypertensive cerebral hemorrhage patients after operation.Conclusion Patients with hypertensive cerebral hemorrhage surgery have a higher inci-dence of depression,which affects the prognosis and outcome of the disease.We should actively intervene earlier.

  1. Logistic regression: a brief primer.

    Science.gov (United States)

    Stoltzfus, Jill C

    2011-10-01

    Regression techniques are versatile in their application to medical research because they can measure associations, predict outcomes, and control for confounding variable effects. As one such technique, logistic regression is an efficient and powerful way to analyze the effect of a group of independent variables on a binary outcome by quantifying each independent variable's unique contribution. Using components of linear regression reflected in the logit scale, logistic regression iteratively identifies the strongest linear combination of variables with the greatest probability of detecting the observed outcome. Important considerations when conducting logistic regression include selecting independent variables, ensuring that relevant assumptions are met, and choosing an appropriate model building strategy. For independent variable selection, one should be guided by such factors as accepted theory, previous empirical investigations, clinical considerations, and univariate statistical analyses, with acknowledgement of potential confounding variables that should be accounted for. Basic assumptions that must be met for logistic regression include independence of errors, linearity in the logit for continuous variables, absence of multicollinearity, and lack of strongly influential outliers. Additionally, there should be an adequate number of events per independent variable to avoid an overfit model, with commonly recommended minimum "rules of thumb" ranging from 10 to 20 events per covariate. Regarding model building strategies, the three general types are direct/standard, sequential/hierarchical, and stepwise/statistical, with each having a different emphasis and purpose. Before reaching definitive conclusions from the results of any of these methods, one should formally quantify the model's internal validity (i.e., replicability within the same data set) and external validity (i.e., generalizability beyond the current sample). The resulting logistic regression model

  2. Persistent diarrhea: risk factors and outcome.

    Science.gov (United States)

    Umamaheswari, B; Biswal, Niranjan; Adhisivam, B; Parija, S C; Srinivasan, S

    2010-08-01

    To identify risk factors associated with Persistent diarrhea (PD) and deaths due to PD. This prospective case control study included 60 children with PD (cases) and 60 children (controls) with acute diarrhoea (AD). Detailed history, examination and appropriate investigations were done for all children. Crude Odds ratio was calculated for each risk factor by univariate analysis and adjusted odds ratio was calculated by multivariate logistic regression. Prior antibiotic use, steroid use, anemia, vitamin A deficiency, malnutrition, LRI, UTI, oral candidiasis, and hyponatremia, were statistically significant risk factors by univariate analysis. Prior antibiotic use, vitamin A deficiency, malnutrition and LRI were independently associated with PD by multivariate logistic regression analysis. The risk factors for mortality were stool frequency more than 10 times per day, severe malnutrition, oral candidiasis, hypoalbuminemia and HIV positivity. The presence of these risk factors should alert the clinician to take appropriate measures, to decrease the mortality.

  3. Logistics innovation development

    DEFF Research Database (Denmark)

    Pedrosa, Alex; Blazevic, Vera; Jasmand, Claudia

    2015-01-01

    limitations/implications – In general, this paper contributes to the understanding of the individuals’ behaviors underlying organization-level phenomena, such as logistics service providers’ customer knowledge acquisition. Practical implications – Findings illustrate that BSEs are well advised to concentrate...... and broaden their knowledge about customers for the development of innovations. Design/methodology/approach – Qualitative research based on multiple semi-structured interviews with BSEs of six logistics service providers was conducted to explore the deepening and broadening of customer knowledge during...... development process. Yet, the specific sequence depends on the type of innovation developed (customized vs standardized). Customer knowledge tends to be deepened in one-on-one interactions, while knowledge tends to be broadened in interactions with numerous and diverse customer firm members. Research...

  4. 基于累积 Logistic 模型的居民通货膨胀异质性感受的因素研究%Empirical Analysis of Factors Leading to the Heterogeneity of Inflation Perceptions Based on the Cumulative Logistic Model

    Institute of Scientific and Technical Information of China (English)

    段进; 段妍; 朱静平

    2015-01-01

    通过调查问卷获取居民的通货膨胀感受及相关的个人特征等数据,运用累积 Logistic 模型,从心理层面和外部信息层面考量影响居民通货膨胀感受异质性的因素。结果表明,收入满意程度、食品价格、房租价格以及促销手段等是导致我国居民通胀感受异质性的主要因素。鉴此,政府应该提高收入满意度、稳定物价以及调节房价,以期降低通货膨胀感受的异质性。%Data related to inflation perceptions and personal characteristics are acquired through a questionnaire.By using the idea of cumulative logistic model as the empirical methodo-logical approach,this paper empirically analyzes the factors that lead to the heterogeneity of infla-tion perceptions through the psychological and external information aspects of the formation of inflation perceptions.The results show that income satisfaction,food price,rent and marketing are the factors with significant effects on the heterogeneity of inflation perceptions.The govern-ment should enhance income satisfaction,stabilize prices and regulate houses price and rent in or-der to decrease the heterogeneity of inflation perception.

  5. Humanitarian logistics and sustainability

    CERN Document Server

    Leeuw, Sander; Regattieri, Alberto; Souza, Robert

    2015-01-01

    This contributed volume combines conceptual and strategic research articles dealing with the "why" and "to what end" of sustainable operations in humanitarian logistics, as well as operational research contributions regarding the "how" from the United Nations as well as from researchers and organizations from different countries (Germany, Australia, Singapore, Italy, Denmark, Jordan). The target audience primarily comprises research experts, decision makers  and practitioners in the field, but the book may also be beneficial for graduate students.

  6. Logistics Assessment Guidebook

    Science.gov (United States)

    2011-07-01

    significant. Another case involved the integration of an aircraft and ground vehicle system. Integration issues were identified early in the design...for height and width; insufficient power requirements to support maintenance actions; and insufficient design of the autonomic logistics system...evaluation at IOT &E and thus on track for Initial Operational Capability (IOC). If not, a plan is in place to ensure they are met (ref DoDI 5000; CJCSM

  7. Rise of humanitarian logistics

    CSIR Research Space (South Africa)

    Maspero, EL

    2008-07-01

    Full Text Available ethical debates raged for both sides. This further complicated a complex supply chain as aid already in the pipeline was halted and returned. After extensive negotiations between the humanitarian sector and the national governments in each country... and financial cost (Tomasini & Van Wassenhove, 2005). 3. COMPARING THE HUMANITARIAN SUPPLY CHAIN TO A COMMERCIAL ONE Anyisa Thomas, Executive Director of the Fritz Institute is quoted by Rodman (2004) as saying: “humanitarian logistics has much in common...

  8. Low rank Multivariate regression

    CERN Document Server

    Giraud, Christophe

    2010-01-01

    We consider in this paper the multivariate regression problem, when the target regression matrix $A$ is close to a low rank matrix. Our primary interest in on the practical case where the variance of the noise is unknown. Our main contribution is to propose in this setting a criterion to select among a family of low rank estimators and prove a non-asymptotic oracle inequality for the resulting estimator. We also investigate the easier case where the variance of the noise is known and outline that the penalties appearing in our criterions are minimal (in some sense). These penalties involve the expected value of the Ky-Fan quasi-norm of some random matrices. These quantities can be evaluated easily in practice and upper-bounds can be derived from recent results in random matrix theory.

  9. Analog multivariate counting analyzers

    CERN Document Server

    Nikitin, A V; Armstrong, T P

    2003-01-01

    Characterizing rates of occurrence of various features of a signal is of great importance in numerous types of physical measurements. Such signal features can be defined as certain discrete coincidence events, e.g. crossings of a signal with a given threshold, or occurrence of extrema of a certain amplitude. We describe measuring rates of such events by means of analog multivariate counting analyzers. Given a continuous scalar or multicomponent (vector) input signal, an analog counting analyzer outputs a continuous signal with the instantaneous magnitude equal to the rate of occurrence of certain coincidence events. The analog nature of the proposed analyzers allows us to reformulate many problems of the traditional counting measurements, and cast them in a form which is readily addressed by methods of differential calculus rather than by algebraic or logical means of digital signal processing. Analog counting analyzers can be easily implemented in discrete or integrated electronic circuits, do not suffer fro...

  10. Role of logistics centres in national logistics system

    Directory of Open Access Journals (Sweden)

    2010-06-01

    Full Text Available This article presents a division of logistics centres according to various criteria and specifies their role in a national logistics system. It provides a classification of the main logistics network nodes. It also describes those features of logistics centres that have an impact on zoning development of towns and regions. The current situation in the national logistics system has been presented here against theoretical analyses and also a concept for the development of a logistics centre network in Poland has been formulated.

  11. Multivariate statistical methods a primer

    CERN Document Server

    Manly, Bryan FJ

    2004-01-01

    THE MATERIAL OF MULTIVARIATE ANALYSISExamples of Multivariate DataPreview of Multivariate MethodsThe Multivariate Normal DistributionComputer ProgramsGraphical MethodsChapter SummaryReferencesMATRIX ALGEBRAThe Need for Matrix AlgebraMatrices and VectorsOperations on MatricesMatrix InversionQuadratic FormsEigenvalues and EigenvectorsVectors of Means and Covariance MatricesFurther Reading Chapter SummaryReferencesDISPLAYING MULTIVARIATE DATAThe Problem of Displaying Many Variables in Two DimensionsPlotting index VariablesThe Draftsman's PlotThe Representation of Individual Data P:ointsProfiles o

  12. Logistic innovations in transport

    Directory of Open Access Journals (Sweden)

    Mirosław Antonowicz

    2014-03-01

    Full Text Available Introduction: The article discusses the issue of logistic innovations in transport. The essentials of logistic innovations in transport together with some examples of specific innovations are presented. The role of the client's needs in transport innovations is indicated. The most vital postulates affecting the innovativeness of shipping companies and derived from the author's experience as well as scholarly publications, are time, safety, reliability as well as comprehensiveness of service offer. Following the analysis of the issue, and on the grounds of Kaizen's and Lean's method, the concept of continuous innovations is suggested as very useful for the development of transport. The potential of clusters as the source of logistic innovations in transport is emphasised. Methods: The discussion of the issue was preceded by the author's analysis of written sources on innovativeness, the evaluation of ratings of innovativeness as well as the analysis of rewarded innovative solutions in transport subsequent to the businesses participation in the programme of innovative solutions in transport. The role of innovation practical business operations is argued following the analysis of some strategic documents such as: 2011 White Paper and the Strategy for the Development of Transport by 2020 adopted by the Polish government in 2013. Aim: The aim of the article is to present the role and significance of the issue of logistic innovations in transport and to cite instances of practical solutions implemented by shipping companies, the solutions which resulted in measurable effects. Following the author's observation of the instances of innovative solutions as well as his analysis of the ratings of innovativeness, the article aims to present the conclusions as for the specific kinds of activities which are indispensable to foster innovativeness in transport. Conclusions: The conclusions derived from the author's analyses and observations show that logistic

  13. Typology of Logistics Curricula – Four Categories of Logistics of Logistics Undergraduate Education in Europe

    OpenAIRE

    Tarvo Niine; Ott Koppel

    2015-01-01

    The field of logistics education is rather colorful. The range of possible topics is huge and so each curriculum has unique approach towards which topic areas to emphasize and which to treat briefly or even omit. There is only little effective standardization in logistics education. This study examines the content of 42 undergraduate logistics curricula in Europe via cluster analysis, with a goal to propose a typology of logistics curricula. The findings define the spectrum of logistics educa...

  14. DECISION-MAKING STRATEGIES REGARDING LOGISTICS ORGANIZATION

    Directory of Open Access Journals (Sweden)

    Ioana Olariu

    2014-07-01

    Full Text Available In the face of higher costs of operation and increasing pressures from customers for better service, the logistics organization must adapt to meet the challenge. An understanding of the factors that make organizations effective, and a knowledge of how these factors interrelate, are the first steps towards developing the system for a firm’s customers. Logistics organizations must of necessity become more cost and service efficient. An understanding of the factors that affect a firm’s organizational effectiveness, along with strategies to reveal weaknesses or deficiencies, can help create more efficient logistics systems. Organizational changes form the basis for procedural modifications that can reduce costs or improve service. Many firms have shown significant improvements in their logistics cost-service mix as a result of organizational changes. Logistics organizations are generally structured along the following lines: strategic versus operational, centralized versus decentralized and line versus staff, in various combinations. There is no single ideal organizational structure, but there are important elements that comprise an effective organization. In general, the factors contributing to organizational effectiveness can be categorized as organizational characteristics, environmental characteristics, employee characteristics, and managerial policies and practices.

  15. Multi-factor Logistic regression analysis on risk factors of prenatal infantile cerebral palsy%先天性小儿脑性瘫痪发病危险因素的多因素条件Logistic回归分析

    Institute of Scientific and Technical Information of China (English)

    邱洪斌; 汪志国; 李晓捷; 王滨有; 姜志梅

    2005-01-01

    BACKGROUND: The risks in pregnancy to the developing fetus result in cerebral palsy after delivery. Therefore, the study on etiology of cerebral palsy should transfer to biological field of embryonic development and stress on multi-factor analysis on relevant environment of pregnant mother,hereditary factors and relevant diseases.OBJECTIVE: To analyze the main risks of incidence of infantile cerebral palsy.DESIGN: Pair design at ratio of 1:2 and Logistic regression analysis of multi-factors were applied.SETTING: Prevention Medical Research Room of Jiamusi University and Department of Epidemiology, College of Public Health, Harbin Medical University.PARTICIPANTS: Totally 103 cases of infantile cerebral palsy were collected from Jiamusi Treatment and Education Center of Cerebral palsy,Shanyang Pediatrics Hospital and Qingdao Pediatrics Hospital from December 2002 to September 2003, of which, 68 cases were male and 35 cases were female. The guardians were in the know and agreed with the investigation. The pair principle at ratio of 1:2 was adopted, based on which, 206 cases of sick children with non-cerebral palsy and disorders in neurological system and healthy children treated at same period in the hospitals were collected as the control. The match conditions in the control were same sex, same nationality and difference in age ± 3 months.sy and healthy children was self-designed. The investigated items included mainly: Factors before delivery (hereditary factors): family history of similar disease; mother's factor: general situations, such as occupation, educational background and age of delivery; behavioral factors of birth: including times of pregnancy, times of delivery and abnormal delivery; healthcare and nutrient in pregnancy: such as examination before delivery and intakes of various foods; sickness or abnormal manifestations in pregnancy: including pathogen infection, pregnant syndromes and vaginal bleeding; medication in pregnancy, fetal placents factors

  16. Multivariate analysis of lifestyle, constitutive and body composition factors influencing bone health in community-dwelling older adults from Madeira, Portugal.

    Science.gov (United States)

    Gouveia, Élvio Rúbio; Blimkie, Cameron Joseph; Maia, José António; Lopes, Carla; Gouveia, Bruna Raquel; Freitas, Duarte Luís

    2014-01-01

    This study describes the association between habitual physical activity (PA), other lifestyle/constitutive factors, body composition, and bone health/strength in a large sample of older adults from Madeira, Portugal. This cross-sectional study included 401 males and 401 females aged 60-79 years old. Femoral strength index (FSI) and bone mineral density (BMD) of the whole body, lumbar spine (LS), femoral neck (FN), and total lean tissue mass (TLTM) and total fat mass (TFM) were determined by dual-energy X-ray absorptiometry-DXA. PA was assessed during face-to-face interviews using the Baecke questionnaire and for a sub-sample by Tritrac accelerometer. Demographic and health history information were obtained by telephone interview through questionnaire. The relationship between habitual PA variables and bone health/strength indicators (whole body BMD, FNBMD, LSBMD, and FSI) investigated using Pearson product-moment correlation coefficient was similar for females (0.098≤r≤0.189) and males (0.104≤r≤0.105). Results from standard multiple regression analysis indicated that the primary and most significant predictors for FNBMD in both sexes were age, TLTM, and TFM. For LSBMD, the most significant predictor was TFM in men and TFM, age, and TLTM in females. Our regression model explained 8.3-14.2% and 14.8-29.6% of the total variance in LSBMD and FNBMD for males and females, respectively. This study suggests that habitual PA is minimally but positively associated with BMD and FSI among older adult males and females and that body composition factors like TLTM and TFM are the strongest determinants of BMD and FSI in this population. Copyright © 2014 Elsevier Ireland Ltd. All rights reserved.

  17. Multivariate analysis on effect factors of clinical outcomes of artificial insemination%影响供精人工授精临床结局多因素分析

    Institute of Scientific and Technical Information of China (English)

    赵华; 王兴玲; 管一春; 李巍巍; 李真; 覃瑶琴

    2011-01-01

    目的:探讨多种因素对AID治疗结局的影响.方法:回顾2008年11月~2010年5月在生殖中心实施AID助孕治疗的418名妇女639个治疗周期的病例,综合分析不孕妇女的年龄、输卵管情况、治疗周期、促排卵用药及授精次数等因素对AID治疗妊娠结局的影响.结果:AID周期妊娠率为34.90%(223/639),例数妊娠率为53.34%(223/418).临床妊娠率与女方年龄、是否合并输卵管因素、授精与排卵时间等有一定关系.排卵前后短时内单次授精的平均妊娠率反而高于排卵前后双次授精.639个AID周期中,随治疗周期的增加累计妊娠率随之增高,但周期妊娠率下降,第1~3周期临床妊娠率依次为37.08%、31.98%、21.95%.AID促排卵周期妊娠率与自然周期无差异(34.02%、35.63%).结论:不孕妇女的年龄、输卵管情况及授精时机的掌握是影响供精人工授精成功率的重要因素.对超过3周期仍不孕者,可考虑改行供精体外授精-胚胎移植进行助孕.%Objective: To explore the effect of multiple factors on outcomes of artificial insemination with donor semen (AID) .Methods: 639 cycles of 418 women receiving AID in the hospital from November 2008 to May 2010 were analyzed retrospectively; the effects of age of infertile women, oviduct situation, treatment cycle, drug use of ovulation induction and times of insemination on pregnancy outcomes of cases receiving AID were analyzed comprehensively. Results: The pregnancy rate per cycle was 34. 90% (223/639), the case pregnancy rate was 53.34% (223/418); clinical pregnancy rate in a way was related to female age, combining with oviduct factors or not,insemination and ovulation time; the average pregnancy rate of single insemination within short time before and after ovulation was significantly higher than that of double insemination; in 639 cycles, the cumulative pregnancy rate increased with treatment cycle, but the cycle pregnancy rate decreased, the clinical

  18. Risk factors and prognosis of postpericardiotomy syndrome in patients undergoing valve surgery

    NARCIS (Netherlands)

    van Osch, Dirk; Dieleman, Jan M.; Bunge, Jeroen J.; van Dijk, Diederik; Doevendans, Pieter A.; Suyker, Willem J.; Nathoe, Hendrik M.

    OBJECTIVE: The study aim was to investigate the long-term prognosis and risk factors of postpericardiotomy syndrome (PPS). METHODS: We performed a single-center cohort study in 822 patients undergoing nonemergent valve surgery. Risk factors of PPS were evaluated using multivariable logistic

  19. Mechanical Parking System Logistics

    Institute of Scientific and Technical Information of China (English)

    2002-01-01

    As the number of motor vehicles increases rapidly in many populated countries, t he shortage of parking space has become a difficult problem to all cities around the world. The contradiction between the shortage of parking space and the incr easing number of motor vehicles is still growing in the recent years. The utiliz ation of various kinds of mechanical parking facilities is an effective solution to this problem. How to organize a reasonable logistics system in a mechanical parking lot so that as man...

  20. Saturated logistic avalanche model

    Science.gov (United States)

    Aielli, G.; Camarri, P.; Cardarelli, R.; Di Ciaccio, A.; Liberti, B.; Paoloni, A.; Santonico, R.

    2003-08-01

    The search for an adequate avalanche RPC working model evidenced that the simple exponential growth can describe the electron multiplication phenomena in the gas with acceptable accuracy until the external electric field is not perturbed by the growing avalanche. We present here a model in which the saturated growth induced by the space charge effects is explained in a natural way by a constant coefficient non-linear differential equation, the Logistic equation, which was originally introduced to describe the evolution of a biological population in a limited resources environment. The RPCs, due to the uniform and intense field, proved to be an ideal device to test experimentally the presented model.

  1. Analysis of multivariate social science data

    CERN Document Server

    Bartholomew, David J; Galbraith, Jane; Moustaki, Irini

    2008-01-01

    Drawing on the authors' varied experiences working and teaching in the field, Analysis of Multivariate Social Science Data, Second Editionenables a basic understanding of how to use key multivariate methods in the social sciences. With updates in every chapter, this edition expands its topics to include regression analysis, confirmatory factor analysis, structural equation models, and multilevel models. After emphasizing the summarization of data in the first several chapters, the authors focus on regression analysis. This chapter provides a link between the two halves of the book, signal

  2. Retrospective Study of Metastatic Melanoma and Renal Cell Carcinoma to the Brain with Multivariate Analysis of Prognostic Pre-Treatment Clinical Factors

    Directory of Open Access Journals (Sweden)

    Ethan A. Ferrel

    2016-03-01

    Full Text Available Patients with brain metastasis from renal cell carcinoma (RCC or melanoma have historically had very poor prognoses of less than one year. Stereotactic radiosurgery (SRS can be an effective treatment for patients with these tumors. This study analyzes the effect of pretreatment prognostic factors on overall survival (OS for RCC and melanoma patients with metastasis to the brain treated with SRS. A total of 122 patients with brain metastases from either RCC or melanoma were grouped by age at brain metastasis diagnosis, whether they received whole brain radiation therapy (WBRT in addition to SRS, or they underwent surgical resection, Karnofsky Performance Score (KPS, number of brain metastases, and primary tumor. Median survival times for melanoma patients and RCC patients were 8.20 ± 3.06 and 12.70 ± 2.63 months, respectively. Patients with >5 metastases had a significantly shorter median survival time (6.60 ± 2.45 months than the reference group (1 metastasis, 10.70 ± 13.40 months, p = 0.024. Patients with KPS ≤ 60 experienced significantly shorter survival than the reference group (KPS = 90–100, with median survival times of 5.80 ± 2.46 months (p < 0.001 and 45.20 ± 43.52 months, respectively. We found a median overall survival time of 12.7 and 8.2 months for RCC and melanoma, respectively. Our study determined that a higher number of brain metastases (>5 and lower KPS were statistically significant predictors of a lower OS prognosis.

  3. Modeling of Robust Design of Remanufacturing Logistics Networks

    Institute of Scientific and Technical Information of China (English)

    XIA Shou-chang; XI Li-feng

    2005-01-01

    The uncertainty of time, quantity and quality of recycling products leads to the bad stability and flexibility of remanufacturing logistics networks, while general design only covers the minimizing logistics cost, so robust design is presented to solve it. The mathematical model of remanufacturing logistics networks is built on the stochastic distribution of uncontrollable factors, and robust objectives are presented. The basic elements of robust design of remanufacturing logistics are redefined, and each part of mathematical model is explained in detail as well. Robust design of remanufacturing logistics networks is a problem of multi-objective optimization in essence.

  4. Logistics systems optimization under competition

    DEFF Research Database (Denmark)

    Choi, Tsan Ming; Govindan, Kannan; Ma, Lijun

    2015-01-01

    Nowadays, optimization on logistics and supply chain systems is a crucial and critical issue in industrial and systems engineering. Important areas of logistics and supply chain systems include transportation control, inventory management, and facility location planning. Under a competitive market...

  5. Logistic regression analysis of influence factors in psoriasis patients with metabolic syndrome%寻常性银屑病患者并发代谢综合征影响因素的Logistic回归分析

    Institute of Scientific and Technical Information of China (English)

    程娟; 张丽; 惠让松; 郐大余; 段红岩; 姚永良; 李安信; 杨雪琴

    2012-01-01

    Objective To explore the related factors of metabolic syndrome in patients psoriasis. Methods Two hundred and two patients with psoriasis were investigated by the questionnaire survey, physical and laboratory examination. Logistic regression was used to analyze the related factors of metabolic syndrome. Results Logistic regression analysis showed that older ages, type A character, breakfast skipping and drinking were independent risk factors of metabolic syndrome in psoriasis patients. Contusion Relieve pressure and improve lifestyle may be useful to reduce tbe occurrence of metabolic syndrome in psoriasis patients.%目的 探讨寻常性银屑病患者发生代谢综合征的相关影响因素.方法 对202例确诊为寻常性银屑病的门诊患者进行问卷调查、体格及实验室检查,对寻常性银屑病患者发生代谢综合征的相关因素进行Logistic回归分析.结果年龄大、A型性格、不吃早餐、饮酒是寻常性银屑病患者并发代谢综合征的独立危险因素.结论 积极调整患者心态,减轻精神压力,改善生活方式,可望降低和预防寻常性银屑病患者代谢综合征的发生.

  6. Multivariate statistics exercises and solutions

    CERN Document Server

    Härdle, Wolfgang Karl

    2015-01-01

    The authors present tools and concepts of multivariate data analysis by means of exercises and their solutions. The first part is devoted to graphical techniques. The second part deals with multivariate random variables and presents the derivation of estimators and tests for various practical situations. The last part introduces a wide variety of exercises in applied multivariate data analysis. The book demonstrates the application of simple calculus and basic multivariate methods in real life situations. It contains altogether more than 250 solved exercises which can assist a university teacher in setting up a modern multivariate analysis course. All computer-based exercises are available in the R language. All R codes and data sets may be downloaded via the quantlet download center  www.quantlet.org or via the Springer webpage. For interactive display of low-dimensional projections of a multivariate data set, we recommend GGobi.

  7. Human Factor Investigation of Waste Processing System During the HI-SEAS 4 Month Mars Analog Mission in Support of NASA's Logistic Reduction and Repurposing Project: Trash to Gas

    Science.gov (United States)

    Caraccio, Anne; Hintze, Paul; Miles, John D.

    2014-01-01

    NASAs Logistics Reduction and Repurposing (LRR) project is a collaborative effort in which NASA is tasked with reducing total logistical mass through reduction, reuse and recycling of various wastes and components of long duration space missions and habitats. Trash to Gas (TtG) is a sub task to LRR with efforts focused on development of a technology that converts wastes generated during long duration space missions into high-value products such as methane, water for life support, raw material production feedstocks, and other energy sources. The reuse of discarded materials is a critical component to reducing overall mission mass. The 120 day Hawaii Space Exploration and Analog Simulation provides a unique opportunity to answer questions regarding crew interface and system analysis for designing and developing future flight-like versions of a TtG system. This paper will discuss the human factors that would affect the design of a TtG or other waste processing systems. An overview of the habitat, utility usage, and waste storage and generation is given. Crew time spent preparing trash for TtG processing was recorded. Gas concentrations were measured near the waste storage locations and at other locations in the habitat. In parallel with the analog mission, experimental processing of waste materials in a TtG reactor was performed in order to evaluate performance with realistic waste materials.

  8. Human Factor Investigation of Waste Processing System During the HI-SEAS 4-month Mars Analog Mission in Support of NASA's Logistic Reduction and Repurposing Project: Trash to Gas

    Science.gov (United States)

    Caraccio, Anne; Hintze, Paul E.; Miles, John D.

    2014-01-01

    NASA's Logistics Reduction and Repurposing (LRR) project is a collaborative effort in which NASA is tasked with reducing total logistical mass through reduction, reuse and recycling of various wastes and components of long duration space missions and habitats. Trash to Gas (TtG) is a sub task to LRR with efforts focused on development of a technology that converts wastes generated during long duration space missions into high-value products such as methane, water for life support, raw material production feedstocks, and other energy sources. The reuse of discarded materials is a critical component to reducing overall mission mass. The 120 day Hawaii Space Exploration and Analog Simulation provides a unique opportunity to answer questions regarding crew interface and system analysis for designing and developing future flight-like versions of a TtG system. This paper will discuss the human factors that would affect the design of a TtG or other waste processing systems. An overview of the habitat, utility usage, and waste storage and generation is given. Crew time spent preparing trash for TtG processing was recorded. Gas concentrations were measured near the waste storage locations and at other locations in the habitat. In parallel with the analog mission, experimental processing of waste materials in a TtG reactor was performed in order to evaluate performance with realistic waste materials.

  9. Outsourcing Operational Logistics: Buyer Beware

    Science.gov (United States)

    2006-05-31

    Privatized Military Logistics 16. SECURITY CLASSIFICATION OF: 17. LIMITATION OF ABSTRACT 18. NUMBER OF PAGES 19a. NAME OF RESPONSIBLE PERSON Chairman, JMO Dept...CONTENTS Abstract i Introduction 1 Historical Examples of Privatized Military Logistics 2 Analysis: Problems of Outsourcing Military Logistics 5...to combat operations contribute to the argument not to privatize military logistics . 2 In the current vocabulary of the American military

  10. Control Systems for Logistics Performance

    OpenAIRE

    Virolainen, V.-M.

    1991-01-01

    This text is concerned with identifying and outlining the various aspects of logistics control and performance measurement process. The objective is to identify, based on available literature, methods and techniques which can be used to measure the performance of logistics. Logistics management is essentially a task of balancing between minimizing cost and ensuring availability objectives. Availability can be seen as the output of logistics system. On the input side, management is concer...

  11. LOGISTICS IN KNOWLEDGE BASED ECONOMY

    OpenAIRE

    Stefan NEDELEA

    2013-01-01

    In the context of contemporary economy logistics changes refer to the emergence of new inter-organizational logistics structures such as logistics networks, and to a number of alterations in organizations’ vision and conduct regarding the role and importance of knowledge. The research focuses on identifying the instruments promoting inter-organizational knowledge transfer within logistics networks provided that each organization relies on its own knowledge and organizational skills to ensure ...

  12. LOGISTICS - SOURCE OF COMPETITIVE ADVANTAGE

    OpenAIRE

    Adriana SCRIOSTEANU; Popescu, Daniela

    2014-01-01

    This paper presents the logistics if source of competitive advantage. Logistics can offer a source of competitive advantage, such as a superior position compared to the competitors regarding cost reductions, service diversity and satisfaction of consumer requirements. The logistic activities generate cost and give value to the final product .Despite that the same logistic activity can be done in many ways, with different costs and performance , the evaluation of the activities and the links b...

  13. Control Systems for Logistics Performance

    OpenAIRE

    Virolainen, V.-M.

    1991-01-01

    This text is concerned with identifying and outlining the various aspects of logistics control and performance measurement process. The objective is to identify, based on available literature, methods and techniques which can be used to measure the performance of logistics. Logistics management is essentially a task of balancing between minimizing cost and ensuring availability objectives. Availability can be seen as the output of logistics system. On the input side, management is concer...

  14. Possibilities of Logistics Policy Improvement

    OpenAIRE

    Petr Průša; David Tilkeridis

    2009-01-01

    The paper presents the strategic logistics management with emphasis on clear, accurate and effective material flow from the suppliers and internally, as well as an outline of the logistics policy for continuous improvement. The implementation of a complete Supplier Logistics Performance System is essential to support internal processes efficiency and establish a continuous improvement system according to the main logistics policy. Every company should consider such a system in order to win in...

  15. LOGISTICS IN KNOWLEDGE BASED ECONOMY

    OpenAIRE

    Stefan NEDELEA

    2013-01-01

    In the context of contemporary economy logistics changes refer to the emergence of new inter-organizational logistics structures such as logistics networks, and to a number of alterations in organizations’ vision and conduct regarding the role and importance of knowledge. The research focuses on identifying the instruments promoting inter-organizational knowledge transfer within logistics networks provided that each organization relies on its own knowledge and organizational skills to ensure ...

  16. Multivariate analysis: A statistical approach for computations

    Science.gov (United States)

    Michu, Sachin; Kaushik, Vandana

    2014-10-01

    Multivariate analysis is a type of multivariate statistical approach commonly used in, automotive diagnosis, education evaluating clusters in finance etc and more recently in the health-related professions. The objective of the paper is to provide a detailed exploratory discussion about factor analysis (FA) in image retrieval method and correlation analysis (CA) of network traffic. Image retrieval methods aim to retrieve relevant images from a collected database, based on their content. The problem is made more difficult due to the high dimension of the variable space in which the images are represented. Multivariate correlation analysis proposes an anomaly detection and analysis method based on the correlation coefficient matrix. Anomaly behaviors in the network include the various attacks on the network like DDOs attacks and network scanning.

  17. The Road to Focused Logistics

    Science.gov (United States)

    2001-04-10

    The Revolution in Military Logistics (RML) and Focused Logistics requires us to view sustainment needs and requirements in a new perspective. Gone...has taken the tenets of Force XXI, Battlefield Distribution, Velocity Management, Army After Next, and the Revolution In Military Logistics and fused

  18. IMPROVING HOSPITAL LOGISTICS BY RETHINKING TECHNOLOGY ASSESSMENT

    DEFF Research Database (Denmark)

    Jacobsen, Peter; Jørgensen, Pelle Morten Thomas

    2011-01-01

    In order to cope with the future challenges of the health care sector, there is an urging need for improving efficiency at hospitals. The study presents a framework enabling health care managers of improving the in-house logistics. The distinctiveness of the framework is the way in which it relates...... technology, logistics, structure and procedures to efficiency. Changing one factor e.g. technology, initiates an iterative loop focusing on change in the related factors in order to obtain the optimal efficiency. The search for an optimal efficient solution is the driving force of the framework...... at a Danish hospital. The framework is tested on the blood sample logistics between the emergency department and laboratory with the goal of enhancing the efficiency of the emergency department....

  19. Problematic Internet Use among Greek university students: an ordinal logistic regression with risk factors of negative psychological beliefs, pornographic sites, and online games.

    Science.gov (United States)

    Frangos, Christos C; Frangos, Constantinos C; Sotiropoulos, Ioannis

    2011-01-01

    The aim of this paper is to investigate the relationships between Problematic Internet Use (PIU) among university students in Greece and factors such as gender, age, family condition, academic performance in the last semester of their studies, enrollment in unemployment programs, amount of Internet use per week (in general and per application), additional personal habits or dependencies (number of coffees, alcoholic drinks drunk per day, taking substances, cigarettes smoked per day), and negative psychological beliefs. Data were gathered from 2,358 university students from across Greece. The prevalence of PIU was 34.7% in our sample, and PIU was significantly associated with gender, parental family status, grade of studies during the previous semester, staying or not with parents, enrollment of the student in an unemployment program, and whether the student paid a subscription to the Internet (p advertisement sites, Google, Yahoo!, their e-mail, ftp, games, and blogs more than non-problematic Internet users. PIU was also associated with other potential addictive personal habits of smoking, drinking alcohol or coffee, and taking drugs. Significant risk factors for PIU were being male, enrolment in unemployment programs, presence of negative beliefs, visiting pornographic sites, and playing online games. Thus PIU is prevalent among Greek university students and attention should be given to it by health officials.

  20. Quality Reporting of Multivariable Regression Models in Observational Studies: Review of a Representative Sample of Articles Published in Biomedical Journals.

    Science.gov (United States)

    Real, Jordi; Forné, Carles; Roso-Llorach, Albert; Martínez-Sánchez, Jose M

    2016-05-01

    Controlling for confounders is a crucial step in analytical observational studies, and multivariable models are widely used as statistical adjustment techniques. However, the validation of the assumptions of the multivariable regression models (MRMs) should be made clear in scientific reporting. The objective of this study is to review the quality of statistical reporting of the most commonly used MRMs (logistic, linear, and Cox regression) that were applied in analytical observational studies published between 2003 and 2014 by journals indexed in MEDLINE.Review of a representative sample of articles indexed in MEDLINE (n = 428) with observational design and use of MRMs (logistic, linear, and Cox regression). We assessed the quality of reporting about: model assumptions and goodness-of-fit, interactions, sensitivity analysis, crude and adjusted effect estimate, and specification of more than 1 adjusted model.The tests of underlying assumptions or goodness-of-fit of the MRMs used were described in 26.2% (95% CI: 22.0-30.3) of the articles and 18.5% (95% CI: 14.8-22.1) reported the interaction analysis. Reporting of all items assessed was higher in articles published in journals with a higher impact factor.A low percentage of articles indexed in MEDLINE that used multivariable techniques provided information demonstrating rigorous application of the model selected as an adjustment method. Given the importance of these methods to the final results and conclusions of observational studies, greater rigor is required in reporting the use of MRMs in the scientific literature.

  1. 青年骨量减少危险因素Logistic回归分析%Binary logistic regression for the risk factors of osteopenia in youths

    Institute of Scientific and Technical Information of China (English)

    张丽; 李文源

    2011-01-01

    目的 筛查可能导致青年骨量减少(OST)的危险因素.方法 按照世界卫生组织1992年颁布14~44岁属于青年的年龄划分界定,收集我院15~43岁原发性骨量减少(-2.580%). Joint clicking and skeletal pain were the most common symptoms, and most of the patients had complaints of fatigue, insomnia and gastric discomforts. Conclusion Inactivity, prolonged use of computers, unbalanced diet, staying up late at night, and alcohol drinking are the risk factors for osteopenia in youths. Most of the patients have a sub-health status, indicating the necessity of relevant interventions to prevent the occurrence of osteoporosis.

  2. Logistic regression analysis of risk factors associated with the stability of miniscrews used as orthodontic anchorage%口腔正畸患者微型种植体支抗钉稳定性危险因素的 Logistic 回归分析

    Institute of Scientific and Technical Information of China (English)

    戴兵; 杨柏霞; 王海艳

    2016-01-01

    Objective:To evaluate risk factors that affect the stability of miniscrew used asorthodontic anchorage.Methods:A total of eighty malocclusional patients from August 2012 to February 2015 in our hospital were enrolled (inclusion criteria:malocclu-sional patients without severe heart,brain and lung disease,without severe liver and kidney disfunction,without neural and mental dis-eases,without contraindications for surgery and tooth extraction)and divided into two groups based on whether the minicrews were loos-en,lost,shifted or not:stable group (57 patients with 241 miniscrews)and unstable group (23 patients with 28 miniscrews).Ten po-tential risk factors,including age,gender,length of minicrews,oral hygiene status,inflammation of the peri-implant tissue,sites and an-gle of loading,the time of initial load application,methods and duration of loading,were firstly screened using univariate analysis,and the significant risk factors were further determined by employing multiple logistic regression analysis.Results:5 significant risk factors were found by univariate analysis,which were age,the time of initial load application,the lasting time of loading,oral hygiene status and Inflammation of the peri-implant tissue.Further study with multiple logistic regression analysis indicated that age was positively associat-ed with the stability of minicrews,while the time of initial load application,lasting time of loading,oral hygiene status and Inflammation of the peri-implant tissue were negatively associated with the stability of minicrews.Conclusion:Age,the time of initial load applica-tion,lasting time of loading,oral hygiene status and Inflammation of the peri-implant tissue were risk factors associated with the stability of minicrews.This information will help to optimize the therapeutic strategies and improve the clinical efficacy.%目的:探讨影响微种植体支抗钉稳定性的危险因素。方法:对80例错牙合患者进行微型种植体支抗正畸治疗

  3. Conceptual grounds of modelling and managing logistics risk of an enterprise

    OpenAIRE

    Vitlinskyy Valdemar V.; Skitsko Volodymyr I.

    2013-01-01

    The article considers theoretical and methodological problems on managing and modelling logistics risk of an enterprise. It shows that managerial decisions in logistics are made in situations, which are characterised with: uncertainty and randomness of results of the risky activity; conflict; counteraction; multi-variance of solution; when simultaneously not all alternative variants of solutions are similarly favourable. The article analyses existing approaches to definition of the "logistics...

  4. Logistic regression analysis of relevant factors on the prognosis of sudden deafness%突发性耳聋预后影响因素分析

    Institute of Scientific and Technical Information of China (English)

    余娇艳; 杨柏球

    2016-01-01

    目的:探讨影响突发性耳聋预后转归的相关因素。方法回顾性分析89例突聋患者的临床资料,对性别、年龄、初诊时间,是否合并高血压、糖尿病,有无眩晕,发病耳别,听力损伤类型及分级等可能与突发性耳聋预后相关的因素进行观察和分析。结果初诊时间越短、听力损伤程度越轻、不伴有眩晕和听力曲线分型为上升型者预后较好。结论应根据突发性耳聋患者的发病时间、耳聋程度、听力曲线类型及是否伴有眩晕分析患者的预后并做到早发现、早治疗。%Objective To investigate the relevant factors on the prognosis of sudden deafness.Methods The clinical data of 89 patients with sudden deafness were analyzed retrospectively.The factors may be associated with the prognosis of sudden deaf-ness such as gender,age,the time from onset to treatment,complicated by hypertension,diabetes,vertigo or not,the type and grade of hearing impairment were observed and analysed.Results The patients who got the better prognosis were those with shorter time from onset to treatment,lighter degree of hearing damage,the ascending curve hearing type and those who were not complicated by dizziness.Conclusion The prognosis of sudden deafness should be analysed according to the time from onset to treatment,complicated by vertigo or not,and the type and grade of hearing impairment,it is necessary to achieve early detection and early treatment.

  5. [Discussion on logistics management of medical consumables].

    Science.gov (United States)

    Deng, Sutong; Wang, Miao; Jiang, Xiali

    2011-09-01

    Management of medical consumables is an important part of modern hospital management. In modern medical behavior, drugs and medical devices act directly on the patient, and are important factors affecting the quality of medical practice. With the increasing use of medical materials, based on practical application, this article proposes the management model of medical consumables, and discusses the essence of medical materials logistics management.

  6. Multivariate Bioclimatic Ecosystem Change Approaches

    Science.gov (United States)

    2015-02-06

    conclude that an analogous patch did not exist. It must exist somewhere, but some of the other MVA techniques were restricted by the mathematical ...found that the Primarily Analogous Multivariate approach developed during this research clearly distinguished itself from the other five approaches in...Principally Analogous Multivariate (PAM) approach ............................................... 29 4.6.1 Introduction to the PAM approach

  7. Multivariate Modelling via Matrix Subordination

    DEFF Research Database (Denmark)

    Nicolato, Elisa

    stochastic volatility via time-change is quite ineffective when applied to the multivariate setting. In this work we propose a new class of models, which is obtained by conditioning a multivariate Brownian Motion to a so-called matrix subordinator. The obtained model-class encompasses the vast majority...

  8. Multivariate covariance generalized linear models

    DEFF Research Database (Denmark)

    Bonat, W. H.; Jørgensen, Bent

    2016-01-01

    We propose a general framework for non-normal multivariate data analysis called multivariate covariance generalized linear models, designed to handle multivariate response variables, along with a wide range of temporal and spatial correlation structures defined in terms of a covariance link...... function combined with a matrix linear predictor involving known matrices. The method is motivated by three data examples that are not easily handled by existing methods. The first example concerns multivariate count data, the second involves response variables of mixed types, combined with repeated...... are fitted by using an efficient Newton scoring algorithm based on quasi-likelihood and Pearson estimating functions, using only second-moment assumptions. This provides a unified approach to a wide variety of types of response variables and covariance structures, including multivariate extensions...

  9. 在线B2C顾客物流服务感知及相关因素的实证研究%An Empirical Research on Online B2C Customer Perceptions of Logistics Services and Related Factors

    Institute of Scientific and Technical Information of China (English)

    卞文良; 鞠颂东; 徐杰; 丁静之

    2011-01-01

    Innovative business-to-customer (B2C) business models are emerging to attract an increasing number of online customers in China. Logistics service providers play a central role for a Chinese customer's decision to purchase online. This paper investigates the importance of logistics services in the online purchase decisions of Chinese customers.This paper investigated the importance and relationships of a customer's perceptions of logistics service, related product values,business flow, corporate images projected by an online vendor. We then proposed a research model to integrate key success factors of B2C business. A survey was conducted with users of a leading B2C company in China. The collected data were analyzed using the structural equation modeling method.Our analysis results showed that corporate image has a significant and positive effect on the perceived quality of logistics service,thereby affecting an online shopper's satisfaction. Two suggestions for online retailers to improve customer satisfaction were drawn from the findings.Online vendors can improve their customers' perceived quality of logistics services by improving their corporate image. Online vendors can also collaborate with upstream supply chain partners to improve the product and quality development process.%物流服务已成为B2C电子商务的重要组成部分,关注顾客的物流服务感知也日渐成为网络零售企业管理面临的新问题.本文分析了B2C电子商务环境下顾客物流服务感知以及与之相关的产品价值感知、商流过程感知和企业形象感知等因素及其这些因素与顾客满意度,顾客忠诚之间的相互关系,并在理论与文献研究的基础上建立了在线B2C顾客物流服务感知相关因素的假设模型.通过某中国大型在线零售商顾客的实际调研并结合结构方程模型的分析,实际数据验证了"在线B2C顾客企业形象感知对其物流服务感知具有显著的正面影响","在线B2C

  10. Relationship between Multiple Regression and Selected Multivariable Methods.

    Science.gov (United States)

    Schumacker, Randall E.

    The relationship of multiple linear regression to various multivariate statistical techniques is discussed. The importance of the standardized partial regression coefficient (beta weight) in multiple linear regression as it is applied in path, factor, LISREL, and discriminant analyses is emphasized. The multivariate methods discussed in this paper…

  11. Foundations of Logistics and Supply Chain Research

    DEFF Research Database (Denmark)

    Georgi, Christoph; Darkow, Inga-Lena; Kotzab, Herbert

    2013-01-01

    The purpose of this paper is to explore the current intellectual foundation of four leading academic journals within the field of logistics and supply chain management. We were interested to identify the most frequently quoted publications as well as their impact on logistics research. We examined...... 17,000 references of 412 papers and further analysed the 39 top-references with the means of multidimensional scaling (MDS), cluster- and factor analysis. We were able to identify a mix of textbooks and articles from academic journals and revealed a journal-specific citation pattern, not only...

  12. Framework of the DOD Logistics System: Educating Leaders on Logistics

    Science.gov (United States)

    2002-04-01

    way to learn the business. I chose this topic for research because I wanted to maximize my opportunity to learn about military logistics during my...Through my exploration of military logistics , I wanted to ultimately develop a better cognitive �big- picture� view of Department of Defense (DOD...successes of the future may be delayed indefinitely.�4 Principles are the basic truths of military logistics hard learned from past experiences

  13. Typology of Logistics Curricula – Four Categories of Logistics of Logistics Undergraduate Education in Europe

    Directory of Open Access Journals (Sweden)

    Tarvo Niine

    2015-05-01

    Full Text Available The field of logistics education is rather colorful. The range of possible topics is huge and so each curriculum has unique approach towards which topic areas to emphasize and which to treat briefly or even omit. There is only little effective standardization in logistics education. This study examines the content of 42 undergraduate logistics curricula in Europe via cluster analysis, with a goal to propose a typology of logistics curricula. The findings define the spectrum of logistics education in four clusters, ranging from „business administration“ with little focus on most specific logistics topics, through „interdisciplinary logistics management“ and „modern transport management“ to „logistics engineering“ with a strong quantitative and technology approach. However, a problem remains that curriculum title does not always reflect actual profile. A typical title “logistics management” might in one case contain various engineering elements, but in another none at all. Such findings point out the need for curricula boards to decide, if trying to cover the entire scope by „one-size-fits-all“ program is the best option or if more distinct focus is needed. In both cases this decision needs to be intentional, agreed and clearly communicated to avoid confusing students and society. Furthermore, the study points out the need to refine standards of competences in logistics, especially for logistics engineering.

  14. Halal Logistics Implementation in Malaysia: A Practical View

    Science.gov (United States)

    Sham, Rohana; Zuraidah Rasi, Raja; Abdamia, Noranita; Mohamed, Suhana; Thahira Bibi, TKM

    2017-08-01

    Concept of halal is not only acceptable world wide by the Muslim society but also to the non Muslim. However, the implementing of halal logistics in daily operation experience a few difficulties especially on the implementation part. Although there are many academic research paper that highlight the issue of halal logistics and the critical success factor, until today, halal logistics in Malaysia is still experiencing a hiccup. This paper try to highlight a few simple ways of implementation of halal logistics that could enhance the total implementation concept at the very least cost to create benefit to all society. The Paper deals with a few aspect of possible implementation and practice to facilitate the halal logistics approach in daily operation. The main objective is to look at the possible method of implementation and critical success factors towards the implementation of halal logistics operation in daily goods movement in Malaysia.

  15. 四肢战创伤并发急性肾衰竭危险因素的logistic回归分析%Logistic regression analysis of the risk factors of acute renal failure complicating limb war injuries

    Institute of Scientific and Technical Information of China (English)

    程昌志; 赵东海; 李全岳; 曲海燕; 陈伯成; 林舟丹

    2011-01-01

    Objective To explore the risk factors of complication of acute renal failure (ARF) in war injuries of limbs. Methods The clinical data of 352 patients with limb injuries admitted to 303 Hospital of PLA from 1968 to 2002 were retrospectively analyzed. The patients were divided into ARF group (n=9) and non-ARF group ( n=343) according to the occurrence of ARF, and the case-control study was carried out. Ten factors which might lead to death were analyzed by logistic regression to screen the risk factors for ARF,including causes of trauma, shock after injury, time of admission to hospital after injury, injured sites, combined trauma, number of surgical procedures, presence of foreign matters, features of fractures, amputation, and tourniquet time. Results Fifteen of the 352 patients died (4.3%) , among them 7 patients (46.7%) died of ARF, 3 (20.0%) of pulmonary embolism, 3 (20.0 %) of gas gangrene,and 2 (13.3%) of multiple organ failure. Univariate analysis revealed that the shock, time before admitted to hospital, amputation and tourniquet time were the risk factors for ARF in the wounded with limb injuries, while the logistic regression analysis showed only amputation was the risk factor for ARF ( P<0.05). Conclusion ARF is the primary cause-of-death in the wounded with limb injury.Prompt and accurate treatment and optimal time for amputation may be beneficial to decreasing the incidence and mortality of ARF in the wounded with severe limb injury and ischemic necrosis.%目的 探讨四肢战创伤并发急性肾衰竭(ARF)的危险因素.方法 回顾性分析1968-2002年收治的352例四肢战创伤患者,根据是否发生ARF将患者分为ARF组(9例)和非ARF组(343例)并进行病例对照研究,选择可能影响患者死亡的10个因素(致伤物、伤后是否休克、伤后入院时间、受伤部位、有无合并伤、手术次数、有否异物存留、骨折性质、是否截肢、止血带时间)进行logistic回归分析,筛

  16. Knowledge Enabled Logistics (KEL)

    Science.gov (United States)

    2010-09-01

    decentralization of work, globalization, telecommuting , emphasis on constant learning, and greater use of teams within the workplace. While these...processes (Diamond, 1996). Organizational development (OD) efforts and or work re-design programs can have a positive impact on organizational outcomes...mismatches between organizational factors and environmental factors (Porras & Silvers, 1991). And to address this mismatch, one can focus on

  17. Reverse food logistics during the product life cycle

    OpenAIRE

    Vlachos, IP

    2014-01-01

    This study aimed to examine reverse logistics across the food product life cycle. Based on a literature review of reverse logistics factors in food industry a set of measures were derived. A survey was conducted to examine the impact of reverse food logistics to supply chain performance across the different product life-cycle stages. A detailed questionnaire was sent to 200 practitioners with experience in food supply chain operations. In total, 48 usable questionnaires were returned, resulti...

  18. Humanitarian response: improving logistics to save lives.

    Science.gov (United States)

    McCoy, Jessica

    2008-01-01

    Each year, millions of people worldwide are affected by disasters, underscoring the importance of effective relief efforts. Many highly visible disaster responses have been inefficient and ineffective. Humanitarian agencies typically play a key role in disaster response (eg, procuring and distributing relief items to an affected population, assisting with evacuation, providing healthcare, assisting in the development of long-term shelter), and thus their efficiency is critical for a successful disaster response. The field of disaster and emergency response modeling is well established, but the application of such techniques to humanitarian logistics is relatively recent. This article surveys models of humanitarian response logistics and identifies promising opportunities for future work. Existing models analyze a variety of preparation and response decisions (eg, warehouse location and the distribution of relief supplies), consider both natural and manmade disasters, and typically seek to minimize cost or unmet demand. Opportunities to enhance the logistics of humanitarian response include the adaptation of models developed for general disaster response; the use of existing models, techniques, and insights from the literature on commercial supply chain management; the development of working partnerships between humanitarian aid organizations and private companies with expertise in logistics; and the consideration of behavioral factors relevant to a response. Implementable, realistic models that support the logistics of humanitarian relief can improve the preparation for and the response to disasters, which in turn can save lives.

  19. An Overview of Reverse Logistics

    Institute of Scientific and Technical Information of China (English)

    WANG Jia-xiang; HE Xin

    2005-01-01

    Until recently, investment in logistics has focused mainly on the flows from companies to markets. Growing concerns for the environment and conserving resources have created new logistical approaches to more effectively manage the distribution function, and make better use of the resources available to an organization. One such approach is reverse logistics, which uses various methods to give scope for a back-load of finished products, components, waste, reusable packing, etc. from consumer to manufacturer. Back-loads allow manufacturers to reduce costs by using the distribution vehicle's return journey to create income or added value. This basic concept is now being developed to create novel solutions to the problems of reducing pollution, costs and vehicle movements, whilst maintaining high customer service levels. In this paper, the idea of reverse logistics is presented; motivations for it are analyzed, several successful practices are demonstrated and some important truths regarding successful reverse logistics are identified, trend of reverse logistics is provided.

  20. The Emergence of City Logistics

    DEFF Research Database (Denmark)

    Gammelgaard, Britta

    2015-01-01

    Purpose: – Many city logistics projects in Europe have failed. A better understanding of the complex organizational change processes in city logistics projects with many stakeholders may expand city logistics capabilities and thereby help prevent future failures. The purpose of this paper...... is therefore to increase understanding of how city logistics emerge, and secondarily, to investigate whether such processes can be managed at all. Design/methodology/approach: – A paradigm shift in urban planning creates new ways of involving stakeholders in new sustainability measures such as city logistics....... Organizational change theory is applied to capture the social processes leading to emergence of city logistics. The methodology is a qualitative processual analysis of a single longitudinal case. Findings: – The change process took different forms over time. At the time of concluding the analysis, positive...

  1. The Emergence of City Logistics

    DEFF Research Database (Denmark)

    2014-01-01

    Purpose: Many city logistics projects in Europe have failed. The purpose of this article is to increase understanding of how city logistics emerge. A better understanding of the complex organizational processes with many actors and stakeholders in city logistics projects may prevent further...... failures. Design/methodology/approach: Theory on organizational change is applied to capture the processes leading to emergence of city logistics. The methodology is process analysis on a single longitudinal case. Findings: The emergence of the Copenhagen city logistics project can be understood....... The study aims at understanding the social processes towards reduced congestion and greenhouse gas emissions from goods transport in inner cities. Originality/value: By better understanding the organization processes leading to implementation of city logistics, other projects in other cities may learn from...

  2. A primer of multivariate statistics

    CERN Document Server

    Harris, Richard J

    2014-01-01

    Drawing upon more than 30 years of experience in working with statistics, Dr. Richard J. Harris has updated A Primer of Multivariate Statistics to provide a model of balance between how-to and why. This classic text covers multivariate techniques with a taste of latent variable approaches. Throughout the book there is a focus on the importance of describing and testing one's interpretations of the emergent variables that are produced by multivariate analysis. This edition retains its conversational writing style while focusing on classical techniques. The book gives the reader a feel for why

  3. Multivariate analysis on effect factors of the parturient milk secretion%影响母婴分离产妇乳汁分泌的多因素分析

    Institute of Scientific and Technical Information of China (English)

    葛圆; 雪丽霜; 覃桂荣; 刘素娥; 李娉霞; 凌静; 徐明; 晏洁梅

    2013-01-01

    Objective To analyze the various factors that influence the parturient milk secretion, and to find out the best method of promoting milk secretion. Method 212 cases of parturient that hospitalized in Guangxi medical u-niversity Obstetrics department during July to December of 2012 was observed and recorded. The index including initial time of breast milk secretion, different time of breast milk secretion volume was analyzed in order to investigate the various factors that influence the parturient milk secretion and use the univariate, multivariate method to analyze the relationship between the parturient milk secretion and the influence factors. Result By single factors analysis, natural childbirth, stimulation of the nipples in postpartum 2h, the increase in the number of milking in 24h, milking time continued 10-30 min, milking 1-3 times in night and depression value (EPDSX9 were in favor of parturient milk secretion, There was significant diffence(P<0. 05). Multivariate analysis showed that the influence factors on milk secretion size sort as follows: stimulation of the nipples in postpartum 2h, mode of delivery, 24h milking number, and depression value. Conclusion Stimulation of the nipples or milking in the early postpartum, milking number increasing and reducing the postpartum anxiety and depression of maternal separation women can contribute to milk secretion and early secretion and to promote the breastfeeding and the maternal and child's health.%目的 分析影响母婴分离产妇乳汁分泌的各种因素,寻找促进乳汁分泌的最佳方法.方法 对2011年7月~12月在广西医科大学第一附属医院产科住院的212例母婴分离产妇进行观察记录,运用单因素和多因素方法分析影响母要分离产妇乳汁分泌的相关因素.结果 单因素分析:自然分娩、产后2h内刺激乳头、24 h挤奶次数的增加、挤奶时间10~30 min、夜间挤奶1~3次、抑郁值(EPDS)<9分者,利于母婴分离产妇乳汁

  4. Situational Awareness and Logistics Division

    Data.gov (United States)

    Federal Laboratory Consortium — Volpe's Situational Awareness and Logistics Division researches, develops, implements, and analyzes advanced systems to protect, enhance, and ensure resilienceof the...

  5. Production-logistic system in the aspect of strategies for production planning and control and for logistic customer service

    Directory of Open Access Journals (Sweden)

    Łukasz Hadaś

    2014-09-01

    Full Text Available Background: The authors made multi-dimensional review of production and logistic strategies in order to prove their coherence in shaping internal and external supply chain. The paper is concluded with definition of production-logistic system as an object of modeling in transformation of business systems of manufacturing companies. Material and methods: The paper is based on analysis of state of the art presented in the literature on the subject of production and logistics strategies. Publications of key importance were selected to identify genesis and basic assumptions of strategies and their functioning. Comparative synthesis of logistic and production strategies identified is developed with respect to authors' experience in application of predefined tools and methods characteristic for strategies identified. Results: The result of the work conducted is consolidation of production and logistic strategies according to multi-variant customer service and original definition of production and logistic system. Conclusions: Production system and logistic system can and should be treated as equal elements in context of material flows management in internal and external supply chains. Such approach enables modeling of both systems as coherent elements realizing selected strategy of customer service.     

  6. Multivariate analysis of the prognostic factors of squamous cell cervical cancer treated by radical hysterectomy or combined radiation therapy; Carcinoma espinocelular do colo uterino submetido a cirurgia radical isolada ou em combinacao com radioterapia

    Energy Technology Data Exchange (ETDEWEB)

    Coelho, Francisco Ricardo Gualda; Kowalski, Luiz Paulo; Abrao, Fauzer Simao [Fundacao Antonio Prudente, Sao Paulo, SP (Brazil). Hospital A.C. Camargo; Franco, Eduardo Luiz [McGill Univ., Montreal, PQ (Canada). Dept. of Oncology; Zeferino, Luiz Carlos [Universidade Estadual de Campinas, SP (Brazil). Faculdade de Medicina; Brentani, Maria Mitzi [Sao Paulo Univ., SP (Brazil). Faculdade de Medicina

    1996-04-01

    Six hundred and nine cases of invasive squamous cell carcinoma of the cervix uteri in a retrospective analysis (1953-1982) at the A.C. Camargo Hospital, Antonio Prudente Foundation, Sao Paulo, Brazil. The patients were submitted to radical surgery and radiation therapy, individually or in combination. A multivariate analysis of the different variables were performed according to the Cox`s regression method. The variables of prognosis value, in decreasing order of importance, were: the decade of patient`s admission, the modality of therapy employed, the presence of residual tumor in the surgical specimens and the clinical stage of the disease. Other variables like ethnic group, age of first menstrual flux, menopause, number of pregnancy, kind of delivery, number and kind of abortion, were found to be of no prognostic importance. The decade of admission was of independent prognostic significance. The presence of residual tumor in the surgical specimens was more important than lymph nodes spreading, but the overall survival was affected by the increase in the number of positive lymph nodes. Patient`s age was a weak prognostic factor accounting for a reduction in the survival time among cases with age upper to 45 years old. Radiation therapy sterilizes a considerable number of lymph nodes but not all of them in every patient. There are a specific group of patients where the radical surgery is necessary in order to carry a complete debulking of the disease. (author) 82 refs., 10 figs.

  7. LOGISTIC ANALYSIS FOR RELATIVELY RISKY FACTORS OF SUICIDAL BEHAVIORS OF MSM%男男性行为者自杀行为相关危险因素Logistic分析

    Institute of Scientific and Technical Information of China (English)

    王毅; 张洪波; 徐杰; 李志军; 张光贵; 杨宏武; 樊静

    2011-01-01

    [目的]了解男男性行为者(MSM)人群自杀行为及相关危险因素.[方法]采用应答者趋动招募抽样法(RDS)对MSM人群进行招募和自填式匿名调查,用非条件Logistic回归分析进行影响自杀行为的危险因素分析.[结果]共调查201人,最近6个月自杀意念、自杀计划、自杀未遂报告率分别为9%、4.5%、3.5%.单因素Logistic回归分析,影响自杀行为的危险因素分别为:自杀意念13个、自杀计划11个、自杀未遂7个.多因素分析,自杀意念主要危险因素是因同性恋被家人训斥、肯定有抑郁症状、BF性伙伴数多、接受过HIV检测、认为同性恋伤害家庭;自杀计划主要危险因素是因同性恋被家人训斥、肯定有抑郁症状、文化程度低;自杀未遂的主要危险因素是经常参加MSM朋友的家庭聚会、因同性恋被家人训斥、文化程度低.[结论]减少社会家庭歧视,针对性开展心理疏导,可降低MSM人群自杀行为发生.%[Objective] To learn MSM group about suicidal behavior and relatively risky factors. [Methods] Research Development and Statistics (RDS) was used to recruit and self-administered- anonymous investigate MSM group. Unconditioned Logistic regression analysis was used to analyze risky factors influencing suicidal behaviors. [Results] We investigated a total of 201 cases for the last 6 months, the rate of suicidal ideation was reported of 9%, the suicidal plan reported the rate of 4.5% and suicide attempted reported the rate of 3.5%. For logistic regression analysis of single factor, the risky factors influencing suicidal behaviors were 13 for suicidal ideation, 11 for suicidal plan and 7 for suicide attempted. For analysis of multi-factors, the reasons for the main risky factors of suicidal ideation were rebuked by families for homosexuality, certainly having depressive symptoms, several of BF partners, having been received HIV test, considering homosexuality harming the families. The reason for

  8. The establishment of industrial branding through dyadic logistics partnership success (LPS): The case of the Malaysian automotive and logistics industry

    OpenAIRE

    Abdul Rahman, NA; Melewar, TC; Sharif, AM

    2014-01-01

    Logistics partnerships across dyadic and triadic relationship networks have been the basis of extensive research in the extant literature. It is well understood that competitive advantage within logistics and distribution and within supply chains are driven by value-adding aspects of not only the core competencies of each tier in the network, but also via tangential supporting factors. It is also well understood that there is a strong relationship between logistics and distribution and market...

  9. 女大学生原发性痛经的多因素Logistic回归分析%Logistic regression analysis on the multi-factors of primary dysmenorrhea of female college students

    Institute of Scientific and Technical Information of China (English)

    陈丽娟; 闫妍

    2014-01-01

    Objective:To investigate the relative factors of the primary dysmenorrhea of college female students. Methods:Taking class as a group in the method of chester sampling, 1574 female college students randomly were surveyed by self-made questionnaires. And relative factors influencing dysmenorrhea were statistically analyzed. Results: In 1574 selected subjects, the incidence of primary dysmenorrheal in female college students was 65.0% (1023/1574), including 757 mild cases (74.0%), 192 moderate cases (18.8%), 74 severe cases (7.2%). According to Logistic regression analysis, mother with history of dysmenorrhea [OR=1. 352, 95% CI (1.087~1.569), P25 [OR=0.695, 95% CI (0.554~0.951), P8 h [ OR=0. 331, 95% CI ( 0. 225~0. 452 ) , P25[OR=0.695,95%CI(0.554~0.951),P8h [OR=0.331,95%CI(0.225~0.452),P<0.05]是原发性痛经的保护因素。结论:女大学生的原发性痛经发生率较高,不良社会心理环境是引起女大学生原发性痛经的主要危险因素,避免体重偏低和充足睡眠可预防痛经的发生。

  10. Model Checking Multivariate State Rewards

    DEFF Research Database (Denmark)

    Nielsen, Bo Friis; Nielson, Flemming; Nielson, Hanne Riis

    2010-01-01

    We consider continuous stochastic logics with state rewards that are interpreted over continuous time Markov chains. We show how results from multivariate phase type distributions can be used to obtain higher-order moments for multivariate state rewards (including covariance). We also generalise ...... the treatment of eventuality to unbounded path formulae. For all extensions we show how to obtain closed form definitions that are straightforward to implement and we illustrate our development on a small example.......We consider continuous stochastic logics with state rewards that are interpreted over continuous time Markov chains. We show how results from multivariate phase type distributions can be used to obtain higher-order moments for multivariate state rewards (including covariance). We also generalise...

  11. Logistic Regression Analysis on ADL Ability of the Rehabilitation Out-comes and its Factors in Ischemic Stroke%缺血性脑卒中康复结局 ADL 能力及其影响因素的 Logistic 回归分析

    Institute of Scientific and Technical Information of China (English)

    刘永丽; 李进元; 龚丛芬; 唐莉; 王云甫

    2015-01-01

    目的:分析缺血性脑卒中患者康复结局 ADL 能力的影响因素,为临床康复和预后判断提供一些客观指标及最佳治疗方案,指导康复治疗工作。方法选取2012年10月-2014年10月治疗和康复出院的缺血性脑卒中患者178例,采用回顾性分析方法,将研究对象的康复结局影响因素分为Ⅰ类不可干预影响因素(性别、年龄、偏瘫侧、类型、病变部位、医疗费用来源、文化程度),Ⅱ类可干预影响因素(康复治疗开始时间、疗程、患者对脑卒中认识、康复的愿望或主动性、康复治疗方法是否规范),Ⅲ类并发症影响因素(肩手综合征、肩痛、肩关节半脱位、心理障碍、言语障碍、认知障碍、下肢深静脉血栓)和Ⅳ类基础疾病的控制质量影响因素(卒中史、高血压、高血脂、高血糖、肥胖)四个类别,使用改良的 Barthel 指数评分(MBI≥60,MBI <60),判断患者 ADL 独立程度,并逐项分类统计后,采用二分类的 Logistic 多因素回归分析。结果缺血性脑卒中患者康复结局的 ADL 能力 MBI 评分与病变的类型、部位、康复治疗开展持续时间、患者对康复的愿望或主动性等有关,并受患者的年龄、医保费用来源、并发症、基础疾病控制质量等因素影响。结论早期重视缺血性脑卒中康复结局影响的关键因素,可有效预防不良因素影响,并为患者提供最佳康复治疗方案,提高日常生活活动自理能力。%Objective To analyze the factors of ADL ability in the rehabilitation outcomes of the pa-tients with ischemic stroke so as to provide some objective indexes of clinical rehabilitation and prognosis judgment and the best therapeutic program, Methods The retrospective analysis was done for 178 patients of ischemic stroke,which were treated or had been rehabilitated and discharged from October 2012 to October 2014, The factors of the

  12. Factors of Transport (and Logistic Development

    Directory of Open Access Journals (Sweden)

    Igor Trupac

    2003-03-01

    Full Text Available The characteristic of the present time is the crucia~ significant,and rapid transformation of the common conditions oftrade, transport, and information interchange. However, thestrategic role in this process belongs to the communication andinformation systems. The development of communication andinformation technology systems is incredibly fast, so that referenceis made to the world of advanced communications.The trend found in business life is very complicated. We arestriving both towards collectivisation as well as individualisationat the same time, since thus the world of competitivenessand co-operation is created.In this world the transport and communication and informationnetwork is expected to become fully integrated in the industrialproduction and service-providing system, so as to providethe foundation for a dynamic adjustment to the market requirements.It is clear that the transport infrastructure and cross-borderdevelopment stand for the predominant developmental impulseto the general and physical development of particular areasand of the Slovenian country as a whole. In the pre-accessionperiod of Slovenia to the EU (the accession of Slovenia tothe EU could only occur in 2003-2004, at the earliest, it is necessary,in both fields, to accelerate the activities that will provideco-operation on equal footing. Taking into consideration allthe increasingly open borders (associated members, full members,the economic development will have a favourable impacton the improved competitiveness and co-operation among regionsand states, which will result in an increase in the flow ofgoods, capital and services, and in particular in an improvedmobility of the population.

  13. 影响急诊科心肺复苏效果的多因素分析%A Logistic regression analysis on the factors influencing effect of cardiopulmonary resuscitation in emergency department

    Institute of Scientific and Technical Information of China (English)

    张豪; 梁实; 陈清; 周文; 肖建鹏; 陈宏标

    2010-01-01

    Objective To look for the independent factors influencing the effect of cardiopulmonary resuscitation (CPR) in emergency department. Methods The data of patients involved in the study were retrieved from 72 network emergency hospitals in Shenzhen from September 2004 to January 2009. The data base was set up with EpiData software, according to questionnaires about cardiopulmonary arrest (CA)patients treated with CPR, and analyzed with SPSS 13.0 software. The binary Logistic regression was carried out with 8 factors which had emerged statistical significance through single factor analysis. Results A Logistic regression analysis on the factors influencing return of spontaneous circulation (ROSC) in emergency department showed the ventrical fibrillation [VF, odds ratio (OR) = 3. 071, P = 0. 000, 95% confidence interval (95%CI)=2. 019 - 4. 670] and pulseless electric activity (PEA, OR=1. 730, P=0. 036,95%CI= 1. 036- 2. 890) were protective factors compared with asystole; electric shock was a protective factor (OR=1. 574, P=0. 015, 95%CI=1. 093 - 2. 265); adrenaline ≤4 mg group had higher likelihood of obtaining ROSC compared with group receiving ≥ 5 mg of adrenaline (OR = 1.483, P= 0.037,95%CI=1.024-2.147); duration of CA before CPR was a risk factor (OR = 0.961, P = 0.000,95%CI=0. 946-0. 976). A Logistic regression analysis on the factors influencing survival to admission in emergency department showed the VF was a protective factor compared with asystole (OR = 2.013,P=0. 002, 95%CI= 1. 299- 3. 121); adrenine ≤4 mg group had higher likelihood of survival to admission compared with group ≥5 mg (OR=2. 289, P=0. 000, 95 %CI=1. 487 -3. 524); duration of CA before CPR was a risk factor (OR = 0. 951, P=0. 000, 95%CI = 0. 933 - 0. 969). Conclusion Rhythm of heart, the duration of CA, electric shock and accumulated adrenaline dosage were independent influencing factors for ROSC in emergency department. Rhythm of heart, the duration of CA and accumulated adrenaline

  14. Strategies for Industrial Multivariable Control

    DEFF Research Database (Denmark)

    Hangstrup, M.

    Multivariable control strategies well-suited for industrial applications are suggested. The strategies combine the practical advantages of conventional SISO control schemes and -technology with the potential of multivariable controllers. Special emphasis is put on parameter-varying systems whose...... dynamics and gains strongly depend upon one or more physical parameters characterizing the operating point. This class covers many industrial systems such as airplanes, ships, robots and process control systems. Power plant boilers are representatives for process control systems in general. The dynamics...

  15. 融合多变量主成份与因子分析算法的犯罪率研究%Research on Crime Rate with Integration of Multivariate Principal Component and Factor Analysis Algorithm

    Institute of Scientific and Technical Information of China (English)

    付艳茹

    2013-01-01

    Based on the uncertainty structure of criminal process,integration of multivariate principal component and factor analysis algorithm has analyzed correlative variables which influence on crime rate such as urbanization rate,unemployment rate,passenger capacity,GDP per capita,urban GINI coefficient,country GINI coefficient,and established multiple regression model to forecast crime rate based on MATLAB simulation platform,measured the sample data in two decades from 1988 to 2007 of Zhejiang province with adoption of MINITAB mathematical software,obtained potential factors affecting crime rate and variance devoting rates,discussed statistical test or relative error of multiple regression model of forecast crime rate,and solved weight distribution or overlapped information of correlative variables on crime rate.%基于犯罪过程的不确定性结构,融合多变量主成份分析与因子分析算法,分析了影响犯罪率的城市化率、失业率、客运量、人均GDP、城市基尼系数、农村基尼系数等多个相关变量因素,由MATLAB仿真建立了犯罪率的多元回归模型,并采用MINITAB数学软件对浙江省1988-2007二十年样本数据进行了实测,获取了影响犯罪率的潜在因子与方差贡献率,讨论了多元回归模型的统计检验及相对误差,解决了犯罪率各相关变量的权重分布及信息相互重叠问题.

  16. Multivariate analysis in thoracic research.

    Science.gov (United States)

    Mengual-Macenlle, Noemí; Marcos, Pedro J; Golpe, Rafael; González-Rivas, Diego

    2015-03-01

    Multivariate analysis is based in observation and analysis of more than one statistical outcome variable at a time. In design and analysis, the technique is used to perform trade studies across multiple dimensions while taking into account the effects of all variables on the responses of interest. The development of multivariate methods emerged to analyze large databases and increasingly complex data. Since the best way to represent the knowledge of reality is the modeling, we should use multivariate statistical methods. Multivariate methods are designed to simultaneously analyze data sets, i.e., the analysis of different variables for each person or object studied. Keep in mind at all times that all variables must be treated accurately reflect the reality of the problem addressed. There are different types of multivariate analysis and each one should be employed according to the type of variables to analyze: dependent, interdependence and structural methods. In conclusion, multivariate methods are ideal for the analysis of large data sets and to find the cause and effect relationships between variables; there is a wide range of analysis types that we can use.

  17. Logistics Outsourcing: Lessons from Case Studies

    Directory of Open Access Journals (Sweden)

    Aldo Srabotic

    2012-06-01

    Full Text Available This paper investigates key success factors in logistics outsourcing. Amodel is used to illustrate outsourcing relationships and then appliedto three examples from the logistics sector. The model is presented asa tool which can help managers to minimize the chance of failure byexplicitly addressing key issues prior to the implementation of a partnership.In order to fully capture the complexity of the outsourcingprocess, the model is refined by the analysis of implementation of outsourcingmethodology and the analysis of the presence of outsourcingmyths in each case. We find that the implementation of outsourcingmethodology is critical to successful outsourcing. Overall, we find thatthe main common factors leading to logistics outsourcing success, afterthe right third party service provider has been selected, are improvedservice levels and commercial viability for both parties, joint vision andobjectives of the partnership, clear roles, top management commitmentand support, communication and trust. The results of the case analysisshed light on what is the key to a successful outsourcing relationshipand indicate how the architecture of logistics outsourcing can be analyzedand improved.

  18. Empirical Study on Influence Factor of Assets Structure of Listed Chinese Logistics Enterprises%我国物流业上市公司资本结构影响因素的实证研究

    Institute of Scientific and Technical Information of China (English)

    杨蔓利

    2013-01-01

    In this paper,using correlativity analysis and progressive multi-factor regression analysis,and with the annual accounting report of 43 listed logistics companies between the years 2009 and 2011 as the sample,we carried out an empirical analysis of the influence factors of the assets structure of the companies and found that the profiting capacity,growth capacity,scale,non-debt tax shield,and actual interest were positively related to the assets structure of the enterprises,the liquidity of the enterprises was negatively related to it,while the relationship was unclear between the value of the assets as collateral and ownership concentration with the structure of the assets of the enterprises.At the end,in light of the findings,we proposed some suggestions for the development of the listed logistics enterprises in China.%为了探讨物流企业资本结构影响因素,利用相关分析和逐步多元回归分析法,以物流业43家上市公司2009-2011年会计年报数据为样本,对物流上市公司资本结构的影响因素进行实证分析.实证结果表明,企业盈利能力、成长性、企业规模、非债务税盾、实际利率与资本结构显著正相关,流动性与资本结构显著负相关,资产担保价值、股权集中度与资本结构关系不明显.最后,结合研究结论及我国目前物流业发展现状,提出物流业上市公司发展合理化建议.

  19. Logistics Integration: Closing the Gap

    Science.gov (United States)

    2012-05-18

    significant understanding of the relationship between operational planning elements on behalf of the operational planning team by the logistics planning...collaborative effort early and often throughout the planning and execution phases. This codependency has been rediscovered throughout history...now answer questions regarding force employment, major tasks and their sequencing, sustainment, and command relationships . Logistics requirements help

  20. Simulation Integrated Design for Logistics

    NARCIS (Netherlands)

    Veeke, H.P.M.

    2003-01-01

    The design of an innovative logistic system is a complex problem in the solution of which many disciplines are involved. Each discipline developed its own way of conceptual modeling for a logistic system based on a mono disciplinary perception. In essence this leads to a communication problem betwee

  1. Information Logistics Research report 2

    NARCIS (Netherlands)

    Willems, A.; Hajdasinski, A.K.; Willems, J.

    2009-01-01

    The goal of this research report is to further explore the concept of Information Logistics (IL), which refers to the usage and dispatch of information and methods of logistics able to support those processes. This report is based upon 6 questions that examine IL in organizations, healthcare organiz

  2. Logistic Regression: Concept and Application

    Science.gov (United States)

    Cokluk, Omay

    2010-01-01

    The main focus of logistic regression analysis is classification of individuals in different groups. The aim of the present study is to explain basic concepts and processes of binary logistic regression analysis intended to determine the combination of independent variables which best explain the membership in certain groups called dichotomous…

  3. INFORMATION STREAMS OF LOGISTICAL SYSTEMS

    Directory of Open Access Journals (Sweden)

    E. N. Zhivitskaya

    2013-01-01

    Full Text Available The problem of formalisation and practical realisation of information streams of logistical systems, as the basic component of a separate kind of systems the logistical information systems having the features and properties that allows to investigate them by means of methods, applicable to information systems is considered.

  4. 慢性硬膜下血肿术后复发的多因素分析%Multivariate analysis of risk factors related to recurrent chronic subdural hematoma

    Institute of Scientific and Technical Information of China (English)

    赵建华; 王超; 瞿准; 朱骏; 邱永明

    2011-01-01

    Objective To explore the risk factors related to recurrent chronic subdural hematoma (CSDH). Methods 171 cases with CSDH were retrospectively analyzed. Results 18 cases were recurrent after surgery with a recurrent rate of 10.5%. Single factor Χ2 analysis showed that the recurrence of CSDH was related to age, hematoma density, hematoma location, midline shift, Bender classfication, encephalatrophy classfication,drainage amount, and bleeding tendency (P < 0.05), regardless of gender,anesthesia mode,and injury history (P > 0.05). Age, hematoma density, midline shift, Bender classfication,encephalatrophy classfication,and bleeding tendency were found to be independently associated with the recurrence of CSDH by Logistic multifactorial analysis (P < 0. 05). Conclusions Patient age,hematoma density, midline shift, Bender classfication, encephalatrophy classfication, and bleeding tendency are prognostic factors fpatients for with CSDH. We should pay more attention to the recurrent risk factors,and implement corresponding prevention strategies.%目的 探讨慢性硬膜下血肿(chronic subdural hematoma,CSDH)术后复发的相关因素.方法 回顾性分析171例CSDH患者的临床资料.结果 本组CSDH患者术后共有18例复发,复发率为10.5%.单因素χ<'2>检验显示CSDH术后复发与年龄、血肿密度、血肿位置、中线移位、Bender分级、脑萎缩分级、引流量和出血倾向相关(P<0.05).与性别、麻醉方式和有无外伤史无关(P>0.05).Logistic多因素分析显示年龄,血肿密度、中线移位、Bender分级、脑萎缩分级和出血倾向为CSDH患者术后复发危险因素(P<0.05).结论 CSDH患者的年龄、血肿密度、中线移位、Bender分级和出血倾向与患者的预后密切相关,应针对复发的高危因素,做好相应的防治工作.

  5. Logistic Regression Analysis of Risk Factors of Incontinence-Associated Dermatitis among Patients with Incontinence%失禁患者发生失禁相关性皮炎危险因素的Logistic回归分析

    Institute of Scientific and Technical Information of China (English)

    谢春晓; 张娜; 吴娟

    2013-01-01

    Objective To explore risk factors of incontinence-associated dermatitis (IAD) in patients with incontinence. Methods Totally 121 patients with incontinence in general wards and care units were included in this study and 13 parameters including gender, age, with chronic disease or not, types of incontinence, frequency of incontinence, with mechanical ventilation or not, modes of nutrition support, albumin, species of antibiotics, methods of oxygen supplying, with sedative or not, Braden scores, body temperature were recorded respectively. The potential influencing factors were analyzed by single factor analysis and logistic regression analysis. Results Single factor analysis revealed that incontinence-associated dermatitis was related with nine factors ( P<0.05), which involved albumin, methods of oxygen supplying, with mechanical ventilation or not, with sedative or not, body temperature, frequency of incontinence, with chronic disease or not, species of antibiotics and Braden scores. Logistic regression indicated that risk factors included species of antibiotics and Braden scores. Conclusion Reasonable application of antibiotics and Braden scale are beneficial to effective prevention of IAD.%目的:探讨失禁患者发生失禁相关性皮炎(incontinence-associated dermatitis,IAD)的危险因素。方法选取一段时间内某院普通病区和监护病区的失禁患者121例,记录性别、年龄、是否存在慢性病、失禁类型、失禁次数、有无进行机械通气、营养支持方式、白蛋白水平、抗生素种数、供氧方式、是否使用镇静剂、Braden评分、体温等13个指标,对可能影响失禁相关性皮炎发生的因素作单因素分析与Logistic多元回归分析。结果单因素分析共筛选出白蛋白水平、供氧方式、有无进行机械通气、是否使用镇静剂、体温、失禁次数、是否存在慢性病、抗菌药物种数、Braden评分9方面因素有统计学意义(均P<0.05)

  6. Classifying hospitals as mortality outliers: logistic versus hierarchical logistic models.

    Science.gov (United States)

    Alexandrescu, Roxana; Bottle, Alex; Jarman, Brian; Aylin, Paul

    2014-05-01

    The use of hierarchical logistic regression for provider profiling has been recommended due to the clustering of patients within hospitals, but has some associated difficulties. We assess changes in hospital outlier status based on standard logistic versus hierarchical logistic modelling of mortality. The study population consisted of all patients admitted to acute, non-specialist hospitals in England between 2007 and 2011 with a primary diagnosis of acute myocardial infarction, acute cerebrovascular disease or fracture of neck of femur or a primary procedure of coronary artery bypass graft or repair of abdominal aortic aneurysm. We compared standardised mortality ratios (SMRs) from non-hierarchical models with SMRs from hierarchical models, without and with shrinkage estimates of the predicted probabilities (Model 1 and Model 2). The SMRs from standard logistic and hierarchical models were highly statistically significantly correlated (r > 0.91, p = 0.01). More outliers were recorded in the standard logistic regression than hierarchical modelling only when using shrinkage estimates (Model 2): 21 hospitals (out of a cumulative number of 565 pairs of hospitals under study) changed from a low outlier and 8 hospitals changed from a high outlier based on the logistic regression to a not-an-outlier based on shrinkage estimates. Both standard logistic and hierarchical modelling have identified nearly the same hospitals as mortality outliers. The choice of methodological approach should, however, also consider whether the modelling aim is judgment or improvement, as shrinkage may be more appropriate for the former than the latter.

  7. Some Considerations about Low-Carbon Logistics

    Institute of Scientific and Technical Information of China (English)

    LI Yifan

    2013-01-01

    More and more People have paid attention to low-carbon logistics.This article,based on the characteristics of low-carbon logistics,proposes the effective ways to achieve low-carbon logistics,including logistics information,effective supply chain management,establishing environmental logistics and reverse logistics.

  8. Logistics Optimization of Auto Parts Supplier Embedded by Service Alliance

    Directory of Open Access Journals (Sweden)

    Yue LONG

    2013-10-01

    Full Text Available To study the logistics service optimization of auto parts suppliers in China, this paper proposes a logistics service optimization model of many service enterprises to one supplier. This model which takes two logistics service enterprises and one supplier as research objects includes the enterprise interests growth model based on the Lotka-Volterra model and interests distribution model using Shapley value method amended by the contribution factor. Furthermore, an example is given to testify the model. The results show that the auto parts supplier’s logistics can be improved and cost can be reduced if the logistics service alliance was established successfully with one core integrating service enterprise and a total logistics service solution was provided. The results also show that as the cost reduces, the interests of the alliance increase and the rational distribution by the integrating service enterprise will help promote the interests of all members

  9. 学龄前儿童单纯性肥胖影响因素的Logistic回归分析%Logistic regression analysis on effect factors of simple obesity of preschool children

    Institute of Scientific and Technical Information of China (English)

    沙海滨; 贺圣文; 王燕琳; 王素珍; 周健; 王琳琳

    2011-01-01

    目的:探讨学龄前儿童单纯性肥胖的影响因素,为制定儿童肥胖预防措施提供依据.方法:采用随机整群抽样的方法,对3所幼儿园学龄前儿童家长进行削卷调查并对结果进行分析.结果:经多因素条件Logistic回归分析,吃油炸食物(OR=1.804)、吃零食(OR=0.095)、偏食(OR=1.797)、食量大(OR=9.130)、父母对孩子肥胖的认知(OR=11.050)等5个因素为学龄前儿童单纯性肥胖的主要影响因素.结论:学龄前儿童不良饮食行为和生活习惯与单纯性肥胖密切相关.%Objective: To explore the effect factors of simple obesity of preschool children, provide a basis for making preventive measures of obesity among children. Methods: A random cluster sampling method was used to survey the parents of preschool children from 3 kindergartens, then the results were analyzed. Results: Multi -factor conditional logistic regression analysis showed that eating fried food ( OR = 1. 804 ), eating snacks ( OR = 0. 095 ), monophagia ( OR = 1.797 ), overeating ( OR = 9. 130 ), the cognition of parents on the obese children ( OR = 11. 050 ) were main effect factors of simple obesity of preschool children. Conclusion: Poor dietary behaviors and living habits of preschool children are related to simple obesity closely.

  10. A case-control study of risk factors for bovine cysticercosis in Danish cattle herds

    DEFF Research Database (Denmark)

    Calvo Artavia, Francisco Fernando; Nielsen, Liza Rosenbaum; Dahl, J.;

    2013-01-01

    a questionnaire and register data from the Danish Cattle Database were grouped into meaningful variables and used to investigate the risk factors for BC using a multivariable logistic regression model. Case herds were almost three times more likely than control herds to let all or most animals out grazing. Case...

  11. Multivariate curve-fitting in GAUSS

    Science.gov (United States)

    Bunck, C.M.; Pendleton, G.W.

    1988-01-01

    Multivariate curve-fitting techniques for repeated measures have been developed and an interactive program has been written in GAUSS. The program implements not only the one-factor design described in Morrison (1967) but also includes pairwise comparisons of curves and rates, a two-factor design, and other options. Strategies for selecting the appropriate degree for the polynomial are provided. The methods and program are illustrated with data from studies of the effects of environmental contaminants on ducklings, nesting kestrels and quail.

  12. Risk factors for nosocomial infections in 113 838 cases of inpatients: a logistic regression analysis%113838例住院患者医院感染及危险因素的logistic回归分析

    Institute of Scientific and Technical Information of China (English)

    王芹

    2011-01-01

    OBJECTIVE To probe into the prevalent tendency of nosocomial infection, determine the risk factors and the impact of the risk factors. METHODS A total of 113 838 inpatients were investigated by case recorder for nosocomial infection and possible risk factors during 8 years in our hospital, and these factors were analyzed by logistic regression analysis. RESULTS 2.53 % of inpatients suffered from the nosocomial infection. The frequent infection site were upper respiratory tract (36.77%), lower respiratory tract (24.09%) ,urinary tract (17.49%), gastrointestinal(7. 00%), skin soft tissue (5. 22%). The independent risk factors were sex, age, length of hospital stay, chemotherapy, ICU, liver disease, mental illness, antibiotics, urinary catheterization, vascular catheter, ventilator, tracheotomy and emergency surgery. CONCLUSIONS The control of nosocomial infection of our hospital is unbalanced, but has been improved generally, we need to develop the measures based on the risk factors.%目的 探讨医院感染流行趋势,确定相关危险因素及其影响程度.方法 调查2002-2009年113 838例住院患者医院感染情况,对可能危险因素进行logistic回归分析.结果 医院感染率为2.53%,以上呼吸道感染最高,占36.77%,其余依次为下呼吸道占24.09%、泌尿道占17.49%、胃肠道占7.00%、皮肤软组织占5.22%等;性别、年龄、住院天数、免疫抑制剂、化疗、ICU、血液病、糖尿病、肝病、精神病、抗菌药物、骨腰穿、尿路捅管及动静脉插管、呼吸机、气管切开、急诊手术、其他慢性病和侵入性操作等19项因素是医院感染的独立危险因素.结论 医院感染控制不平衡,但总体好转,应根据危险因素制定控制措施.

  13. Multivariate Generalized Multiscale Entropy Analysis

    Directory of Open Access Journals (Sweden)

    Anne Humeau-Heurtier

    2016-11-01

    Full Text Available Multiscale entropy (MSE was introduced in the 2000s to quantify systems’ complexity. MSE relies on (i a coarse-graining procedure to derive a set of time series representing the system dynamics on different time scales; (ii the computation of the sample entropy for each coarse-grained time series. A refined composite MSE (rcMSE—based on the same steps as MSE—also exists. Compared to MSE, rcMSE increases the accuracy of entropy estimation and reduces the probability of inducing undefined entropy for short time series. The multivariate versions of MSE (MMSE and rcMSE (MrcMSE have also been introduced. In the coarse-graining step used in MSE, rcMSE, MMSE, and MrcMSE, the mean value is used to derive representations of the original data at different resolutions. A generalization of MSE was recently published, using the computation of different moments in the coarse-graining procedure. However, so far, this generalization only exists for univariate signals. We therefore herein propose an extension of this generalized MSE to multivariate data. The multivariate generalized algorithms of MMSE and MrcMSE presented herein (MGMSE and MGrcMSE, respectively are first analyzed through the processing of synthetic signals. We reveal that MGrcMSE shows better performance than MGMSE for short multivariate data. We then study the performance of MGrcMSE on two sets of short multivariate electroencephalograms (EEG available in the public domain. We report that MGrcMSE may show better performance than MrcMSE in distinguishing different types of multivariate EEG data. MGrcMSE could therefore supplement MMSE or MrcMSE in the processing of multivariate datasets.

  14. Envolvimento renal na púrpura de Henoch-Schönlein: uma análise multivariada de fatores prognósticos iniciais Renal involvement in Henoch-Schönlein purpura: a multivariate analysis of initial prognostic factors

    Directory of Open Access Journals (Sweden)

    José Luiz J. de Almeida

    2007-06-01

    , central nervous system involvement and pulmonary hemorrhage, laboratory tests (serum IgA levels and treatment given (corticosteroids, intravenous immunoglobulin and immunosuppressive drugs. Patients were divided into two groups (presence or absence of nephritis and assessed by univariate and multivariate analysis. RESULTS: Evidence of nephritis was detected in 70 patients (49.3%. The univariate analysis revealed that severe abdominal pain (p = 0.0049; OR = 1.6; 95%CI 1.18-2.21, gastrointestinal bleeding (p = 0.004; OR = 1.6; 95%CI 1.10-2.26 and corticosteroid use (p = 0.0012; OR = 1.7; 95%CI 1.28-2.40 were all associated with increased incidence of renal involvement. In the multivariate analysis, logistic regression demonstrated that the only independent variable that predicted nephritis was intense abdominal pain (p < 0.012; OR = 2.593; 95%CI 1.234-5.452. CONCLUSIONS: Severe abdominal pain was a significant predictor of nephritis in Henoch-Schönlein purpura. Consequently, pediatric patients exhibiting this clinical manifestation should be rigorously monitored, due to the increased risk of renal involvement.

  15. Logistic regression applied to natural hazards: rare event logistic regression with replications

    Directory of Open Access Journals (Sweden)

    M. Guns

    2012-06-01

    Full Text Available Statistical analysis of natural hazards needs particular attention, as most of these phenomena are rare events. This study shows that the ordinary rare event logistic regression, as it is now commonly used in geomorphologic studies, does not always lead to a robust detection of controlling factors, as the results can be strongly sample-dependent. In this paper, we introduce some concepts of Monte Carlo simulations in rare event logistic regression. This technique, so-called rare event logistic regression with replications, combines the strength of probabilistic and statistical methods, and allows overcoming some of the limitations of previous developments through robust variable selection. This technique was here developed for the analyses of landslide controlling factors, but the concept is widely applicable for statistical analyses of natural hazards.

  16. Current State and Issues of Logistics Cost Accounting and Management in Malaysia

    OpenAIRE

    Zakariah, Sahidah; Pyeman, Jaafar

    2013-01-01

    Background: Logistics cost is an important factor affecting the competitiveness on both macro (national) and micro level (firms). Logistics cost indicates the performance of logistics industry, efficiency level and its competitiveness. Research Problem: Despite of its significance, current state of logistics cost accounting and management in Malaysia has not properly addressed and the issues surround logistics cost measurement remains incoherent. Aim of research: The purpose o...

  17. Multivariable modeling and multivariate analysis for the behavioral sciences

    CERN Document Server

    Everitt, Brian S

    2009-01-01

    Multivariable Modeling and Multivariate Analysis for the Behavioral Sciences shows students how to apply statistical methods to behavioral science data in a sensible manner. Assuming some familiarity with introductory statistics, the book analyzes a host of real-world data to provide useful answers to real-life issues.The author begins by exploring the types and design of behavioral studies. He also explains how models are used in the analysis of data. After describing graphical methods, such as scatterplot matrices, the text covers simple linear regression, locally weighted regression, multip

  18. MULTIVARIATE ANALYSIS OF RELATIONSHIPS BETWEEN IODINE BIOLOGICAL EXPOSURE AND SUBCLINICAL THYROID DYSFUNCTIONS

    Institute of Scientific and Technical Information of China (English)

    Wei Chong; Zhong-yan Shan; Wei Sun; Wei-ping Teng

    2005-01-01

    Objective To assess the relationships between iodine biological exposure and subclinical thyroid dysfunctions. Methods The cross-sectional survey was performed to obtain the epidemiologic data of population in three communities with different iodine biological exposure: mild iodine deficiency [median urinary iodine concentration (MUI) of 50 99g/L], more than adequate iodine intake (MUI of 200-299 μg/L), and excessive iodine intake (MUI over 300 μg/L). Univariate and multivariate analysis (logistic regression analysis) were used to analyze the risk factors of subclinical hypothyroidism and subclinical hyperthyroidism. Results Logistic regression analysis with sex and age controlled suggested that more than adequate iodine intake (OR = 3.172, P = 0.0004) and excessive iodine intake (OR = 6.391, P = 0.0001) increased the risk of subclinical hypothyroidism, while excessive iodine intake decreased the risk of subclinical hyperthyroidism (OR = 0.218, P= 0.0001). Logistic regression analysis including interaction of iodine intake and antibodies [tryroid peroxidase antibody (TPOAb) and thyroglobulin antibody (TgAb)] suggested that excessive iodine intake was an independent risk factor of subclinical hypothyroidism (OR = 6.360, P = 0.0001), but independent protect factor of subclinical hyperthyroidism (OR = 0.193, P = 0.0001). More than adequate iodine intake and it's interaction with TgAb increased the risk of subclinical hypothyroidism independently, in addition, it decreased the risk of subclinical hyperthyroidism at the present of TPOAb. Conclusion Both excessive iodine intake and more than adequate iodine intake could increase risk of subclinical hypo thyroidism, supplement of iodine should be controlled to ensure MUI within the safe range.

  19. Logistic Regression Analysis of Risk Factors of Early Postoperative Cognitive Dysfunction in Patients after Open Heart Surgery%心内直视术后早期认知功能障碍危险因素的logistic回归分析

    Institute of Scientific and Technical Information of China (English)

    涂杰; 张炳东; 韦秋英; 李涛; 何芳

    2013-01-01

    目的 探讨心内直视术后早期认知功能障碍(POCD)的危险因素.方法 心内直视术后315例患者,分别在术前7 d和术后7 d采用中文版简易精神状态检查量表(MMSE)进行认知功能评价,按是否发生POCD,将患者分为POCD组和非POCD组.收集两组患者性别、年龄和体质指数等共26个相关因素,通过单因素分析和多因素logistic回归分析筛选心内直视术后发生早期POCD的独立危险因素.结果 315例患者中有301例完成本研究,其中发生POCD 138例(45.8%).单因素分析显示,年龄、受教育程度、吸烟、饮酒、高血压、冠心病、糖尿病、脑血管病、药物依赖、阿托品用量、体外循环时间、手术时间、术中低血压和术后疼痛在两组间差异有统计学意义(P均<0.05).多因素logistic回归分析显示:年龄、吸烟、饮酒、高血压、糖尿病、阿托品用量、体外循环时间和术中低血压是心内直视术后发生早期POCD的独立危险因素(P均<0.05),受教育程度是其保护因素.结论 POCD是心内直视术后常见的并发症.年龄、吸烟、饮酒、高血压、糖尿病、阿托品用量、体外循环时间和术中低血压是术后发生早期POCD的危险因素,受教育程度是其保护因素.%Objective To investigate the risk factors of early postoperative cognitive dysfunction( POCD ) in patients after open heart surgery. Methods A total of 315 patients undergoing open heart surgery were divided into POCD group and non-POCD group by the mini-mental state examination( MMSE ) 7 days before and after operation, respectively. The gender,age,body mass index and other 23 related factors were collected from both groups. The independent risk factors of early POCD after open heart surgery were determined by univariate and multivariate logistic regression analysis. Results Of 301 patients who completed the study ,138( 45.8% ) cases developed POCD. Univariate analysis showed that age,level of

  20. 影响 COPD 患者正确吸入定量气雾剂因素的 Logistic 回归分析%Effects of COPD inhalation in patients with the correct analysis of the related factors of quantitative aerosol and intervention measures

    Institute of Scientific and Technical Information of China (English)

    郭丽华; 胡克

    2015-01-01

    Objective To investigate the effect of chronic obstructive pulmonary disease( COPD)in patients with right suction related factors and intervention measures of quantitative aerosol. Methods A retrospective analysis was performed in patients with COPD in our hospital from 2011 March to 2014 March 240 cases of outpatients and inpatients,to quantify the aerosol application in clinical practice and use a survey of awareness syndrome as the evaluation points. The indexes included sex,age,course of disease,degree of education,accept the health education situation and condition and the correct relationship between quantitative aerosol inhalation agent for univariate and Logistic multivariate linear re-gression analysis. Results ①The majority of patients cognition of aerosol is relatively low. The scores of the most patients were in the 1 ~ 2 be-tween patients using quantitative aerosol. The error of most patients appearing in the process of the highest frequency of operation is "breath hold 10 s lack of" and "spray and suction synchronization",accounting about the total operation errors 36. 99% and 29. 91% . ②The single factor anal-ysis showed that besides sex,age,culture degree,pathological degree,course of disease,whether or not receiving health education were correlated with quantitative aerosol correct breathing( P < 0. 05),with age( P = 0. 032)and the degree of culture( P = 0. 029)the influence degree of the two factors on the correct inhalation aerosol agent of the maximum. ③Multivariate analysis showed that the three factors of age,culture degree, pathological degree are important factors affecting the correct inhalation aerosol( P < 0. 05). Conclusion Age,culture degree,pathological de-gree are important factor affects COPD of patients with inhalation of quantitative aerosol. All these factors need to be paid attention to by clinicians, patients on specific health intervention.%目的:探讨影响慢性阻塞性肺疾病(COPD)患者正确吸入定量