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Multivariate Geostatistical Model for Groundwater Constituents in Texas

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International Journal of Geosciences 2014年第13期5卷 1609-1617页

作者： faye Anderson Texas A & M AgriLife Research Center at Beaumont College Station Texas USA

Although many studies have explored the quality of Texas groundwater, very few have investigated the concurrent distributions of more than one pollutant, which provides insight on the temporal and spatial behavior of constituents within and between aquifers. The purpose of this research is to study the multivariate spatial patterns of seven health-related Texas groundwater constituents, which are calcium (Ca), chloride (Cl), nitrate (NO3), sodium (Na), magnesium (Mg), sulfate (SO4), and potassium (K). Data is extracted from Texas Water Development Board’s database including nine years: 2000 through 2008. A multivariate geostatistical model was developed to examine the interactions between the constituents. The model had seven dependent variables—one for each of the constituents, and five independent variables: altitude, latitude, longitude, major aquifer and water level. Exploratory analyses show that the data has no temporal patterns, but hold spatial patterns as well as intrinsic correlation. The intrinsic correlation allowed for the use of a Kronecker form for the covariance matrix. The model was validated with a split-sample. Estimates of iteratively re-weighted generalized least squares converged after four iterations. Matern covariance function estimates are zero nugget, practical range is 44 miles, 0.8340 variance and kappa was fixed at 2. To show that our assumptions are reasonable and the choice of the model is appropriate, we perform residual validation and universal kriging. Moreover, prediction maps for the seven constituents are estimated from new locations data. The results point to an alarmingly increasing levels of these constituents’ concentrations, which calls for more intensive monitoring and groundwater management.

关键词： Multivariate Geostatistical Groundwater Constituents Texas

双作用叶片式二次元件在车辆传动系统中的应用

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农业机械学报 2006年第3期37卷 8-11页

作者：臧发业山东交通学院科研处

通过分析双作用叶片式二次元件的结构和工作原理,得出了应用二次元件的公交汽车传动系统的节能机理,建立了二次调节传动系统的数学模型,在非恒压网络中采用恒功率控制节能制动方式,对二次调节传动系统的动态性能进行了仿真研究,结论表... 详细信息

通过分析双作用叶片式二次元件的结构和工作原理,得出了应用二次元件的公交汽车传动系统的节能机理,建立了二次调节传动系统的数学模型,在非恒压网络中采用恒功率控制节能制动方式,对二次调节传动系统的动态性能进行了仿真研究,结论表明应用二次调节技术能够回收和重新利用系统的制动动能,减小了系统的装机容量,实现了节能降耗。

关键词：车辆叶片式二次元件性能仿真

Study of the Factors Associated with Home Delivery in a Situation of Free Care in Senegal

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Open Journal of Epidemiology 2017年第4期7卷 326-336页

作者： Adama faye Anta Tal-Dia Daouda faye Instute of Health and Development Cheikh Anta Diop University Dakar Sénégal Dental Public Health Service Cheikh Anta Diop University Dakar Sénégal

Introduction: Home delivery is still a health problem in Kolda (Senegal). The aim of this work is to study the factors associated with the place of delivery in a situation of free care delivery. Method: A descriptive and analytical cross-sectional study was carried out. Sampling was in two-stage clusters. The study focused on women who gave birth in the last 12months. The data were collected during an individual interview at home. The collection focused on knowledge, attitudes and practices about delivery. Logistic regression was used to explore the determinants of childbirth at the level of health facility. Results: The average age was 25.4 ± 6.5 years. Among the interviewed women, education was reported in 35% of the women and 55% of women estimate that the closest health facility is within 5 km to their home. The time to get to the nearest health facility is less than 15 minutes for 39% of the interviewed women. The prevalence of home delivery was 43.5%. Home delivery was related to the remoteness of the health facility (2.43 [1.75 - 3.37]) but also to incomplete antenatal care (2.52 [1.59 - 4.00]). Support groups highlighted difficulties of access to health facilities because of remoteness. Interviews revealed a lack of involvement of husbands in seeking care for women. Cultural barriers are still there. Conclusions: Despite the gratuity of delivery, the remoteness of health structures and socio-cultural factors are still barriers to access to care for pregnant women. These aspects must be taken into account in health policies. Multi-lateral interventions should be implemented to provide solutions for this health problem.

关键词： Home Delivery Free Care Health Facility Senegal

Delirium after emergency hip surgery-common and serious, but rarely consented for

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World Journal of Orthopedics 2019年第6期10卷 228-234页

作者： Louis J Koizia faye Wilson Peter Reilly Michael B Fertleman Geriatric Medicine Imperial College NHS TrustLondon W2 1NYUnited Kingdom Geriatric Medicine City Hospitals SunderlandSunderland SR4 7TPUnited Kingdom Department of Trauma and Orthopaedics Imperial College Healthcare NHS TrustLondon W2 1NYUnited Kingdom

A quarter of patients admitted with a proximal femoral fracture suffer from an acute episode of delirium during their hospital *** it is often unrecognised,poorly managed,and rarely discussed by *** is important not only to the affected individuals and their families,but also socioeconomically to the broader *** increases mortality and morbidity,leads to lasting cognitive and functional decline,and increases both length of stay and dependence on *** should be routinely and openly discussed by all members of the clinical team,including surgeons when gaining *** to do so may expose surgeons to claims of *** we present a concise review of the literature and discuss the epidemiology,causative factors,potential consequences and preventative strategies in the perioperative period.

关键词： Delirium Proximal femoral fractures Consent Hip surgery Montgomery Medicolegal

Profile of Plasma Galectin-3 Concentrations, Inflammatory Cytokines Levels and Lymphocytes Status in Breast Cancer under Chemotherapy

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Open Journal of Immunology 2022年第1期12卷 1-14页

作者： Doudou Georges Massar Niang Sidy Ka Jacobus Hendricks Doudou Diouf Folly Mawulolo Gaba Adame Diouf Maimouna Diop Moustapha Mbow Babacar faye rokhaya Ndiaye Diallo Maguette Deme Sylla Niang Ahmadou Deme Babacar Mbengue Alioune Dieye Unit of Immunology FMPOS Cheikh Anta Diop University Dakar Senegal Unit of Immunology Aristide Le Dantec Hospital Dakar Senegal Joliot Curie Institute Aristide Le Dantec Hospital Dakar Senegal Department of Physiology University of Limpopo Limpopo South Africa Unit of Human Genetics FMPOS Cheikh Anta Diop University Dakar Senegal

We investigated relationship between galectin-3 (Gal-3) levels and T lymphocytes apoptosis and the activation rates in breast cancer during chemotherapy. We used plasma samples from 112 women classified into two groups: 70 women with breast cancer (BC) and submitted to neoadjuvant chemotherapy (3 cycles) and 42 healthy women used as controls. In the group of BC, blood samples were taken before each cycle of chemotherapy and Gal-3 levels was evaluated by ELISA sandwich. Flow cytometry was used to study T cells apoptosis and activation. Before treatment, median value of Gal-3 was 6.31 ng/ml (range 1.07 - 50.74) in BC and 0.84 ng/ml (range 0.00 - 4.82) in HC. Gal-3 levels were highest in plasmas from BC (p p p = 0.010). In addition, we found a dynamic relationship between gal-3 levels, tumor size and T lymphocytes apoptosis rates during treatment depending to the cure efficiency. We suggest gal-3 plasma concentrations could be used as predictive biomarker for chemotherapy efficiency in breast cancer patients.

关键词： Galectin-3 T Lymphocyte B Lymphocyte Breast Neoplasms

Factors Predisposing and Triggering the Phenomenon of Shrinkage-Swelling of Clay Soils in the Urban Center of Diamniadio

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Geomaterials 2023年第2期13卷 23-34页

作者： Khadim faye Fatou Samb Pape Sanou faye Yves Berthaud Laboratoire de Mécanique et Modélisation UFR Sciences de l’Ingénieur UIDT Thiès Sénégal UFR Sciences et Technologies Université Iba Der Thiam de Thiès Thiès Sénégal

The phenomena of shrinkage and swelling of clay induce damage to housing structures every year. Precipitation, climatic changes and drought are the cause of wall cracks due to subsidence or swelling of the supporting soil. This movement alters the balance between the soil and the structures. To explain this defection, the soil is made up of three elements: the solid, the liquid and the gas. Sometimes in a natural way or following a human intervention, one of these elements undergoes an abnormal variation that causes the loss of the balance between land and works. It is in this sense that this article deals on the one hand with the factors of predisposition and triggering of the phenomena of shrinkage-swelling of the clay soils of Diamniadio and on the other hand, the factors of aggravation linked to the lithological heterogeneity and the variation in the thickness of the layers susceptible to shrinkage-swelling. The studies carried out have enabled a deeper understanding of the behavior of expansive soils following their interactions with climate, vegetation, hydrology, hydrogeology, constructions among others, but also the influence of lateral and vertical variations of fine soil facies.

关键词： Swelling Clays Expansive Soil Shrinkage-Swelling Desiccation Cracks Diamniadio

Contribution of Sentinel-2/Landsat-8 OLI Images to Extracting Vegetation Cover and Wetlands Area in Urban Zones: Case of the Dakar Region (Senegal)

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Journal of Geographic Information System 2021年第4期13卷 523-537页

作者： Dome Tine Gayane faye Omar Marico Modou Mbaye Landing Biaye Mbagnick faye Guilgane faye Département de Géographie Chercheur Associé au Laboratoire de Télédétection Appliquée (LTA) Institut des Sciences de la Terre (IST) Université Cheikh Anta DIOP de Dakar Dakar Sénégal Laboratoire de Télédétection Appliquée (LTA) Institut des Sciences de la Terre (IST) Université Cheikh Anta DIOP de Dakar Dakar Sénégal Département de Géographie Cheikh Anta DIOP University of Dakar Dakar Sénégal

Urban areas house vegetation cover in several forms, fulfilling several ecological functions like thermal regulator, biodiversity, air quality, etc. However, their extent is often not very well known, especially in African cities, making it sometimes difficult to assess their real impact on the urban ecosystem functioning. This work aims to analyse the capacity of satellite sensors for mapping vegetation and wetlands in urban areas. The data produced by the MSI sensors of Sentinel 2 and OLI of Landsat-8 are used to identify and map the vegetation cover in the Dakar region through a supervised classification with the Support Vector Machine (SVM) algorithm. The results show that it is sometimes not very easy to analyse urban vegetation with high spatial resolution images (HRS) resulting from the configuration of the vegetation in an urban environment, sometimes characterized by isolated trees or small green spaces. This explains why Sentinel-2 data which spatial resolution of 10 meters gives a better result compared to Landsat-8 data which is 30 meters. However, a good rendering is noted for the vegetation around the wetlands area for the two sensors resulting from the high density and the size of the vegetated perimeters in this part of the capital. Overall, there is an underestimation of urban vegetation cover, particularly for Landsat-8. The use of very high spatial resolution images could be necessary to better assess the potential of satellite data for monitoring urban vegetation in Sahelian context.

关键词： Remote Sensing Urban Area Vegetation Wetland Area Dakar

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THE BUZZ

城市漫步（GBA版） 2020年第10期 10-11页

作者： faye Wong 不详

Legendary C-pop songstress faye Wong made the news last month after singing a duet with Alibaba founder Jack Ma on Wong's live broadcast(which are rare).The duo performed the emotional 1996 song'If the Cloud Knows'.

关键词： emotional Cloud rare

Study and Comparison of Swelling and Compressibility Characteristics of Crumb Marl, Flaky Marl with Attapulgite and Sandy Clay from the Diamniadio Urban Pole at the Oedometer

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Geomaterials 2023年第3期13卷 61-70页

作者： Khadim faye Fatou Samb Yves Berthaud Pape Sanou faye Laboratoire de Mécanique et Modélisation UFR Sciences de l'Ingénieur UIDT Thiès Sénégal UFR Sciences et Technologies Université Iba Der Thiam de Thiès Sénégal

In Senegal, the Diamniadio, Sebikhotane and Bargny sector contains clay soils that are problematic for construction. In order to have more information on the behavior of the clay soils of Diamniadio, free swelling tests followed by load-discharge cycles were carried out according to standard NF P 94-090-1. These tests were carried out using an Oedometric device on the three samples from the study site (sandy clays with calcareous concretion, marls with crumbs and laminated marls with attapulgite) to apprehend their swelling aspects in saturated conditions. For the free swelling test, a determination of the different swelling phases will be carried out followed by a comparison of the rate of evolution of the phases for the three samples from the site. In the same vein, the compressibility characteristics of the samples will also be provided from load-unload Oedometric tests. Thereafter, we proceed to a comparison of the void index at the initial state of the samples after two charge-discharge cycles and the influence of the cycles on the reorganization of the internal structure of the samples. These studies will provide more information on the swelling behavior of Diamniadio soils in the presence of water.

关键词： Clay Swelling Expansive Soil Evolution of The Swelling Compressibility Coefficient Charge-Discharge Cycle