3,873 research outputs found

    Natural Stone Waste Powders Applied to SCC Mix Design

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    In order to comply with current trends concerning sustainability, saving of primary materials and energy\ud savings, this paper addresses Eco-concrete. The major focus thereby is on the increased efficiency of cement\ud use. Applying a new mix design method for concrete, cement contents can be decreased and partially be substituted\ud by other fine powders, preferentially by waste powders which have no mass application so far. This\ud paper is giving examples of successfully introduced waste powders and characterizes the concretes produced\ud with these powders. These innovative, low cement concrete types obtain medium strength and exhibit furthermore\ud self-compacting abilities. This paper additionally highlights possibilities for the direct use of natural\ud stone sludges or filter cakes. A new grading based design method, developed in the authors’ research\ud group, enables the efficient use of all materials available. The method is applicable to self-compacting concretes,\ud earth-moist concretes and conventionally vibrated concretes

    Soils and soil conditions of the Amatikulu project [KZN, South Africa]

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    This report describes a soil study which was carried out in the framework of SASRI project 06TT01, "Best management practices for small-scale sugarcane growers in the Amatikulu catchment (Zululand) including alternative crops" The soil study was carried out on the site selected between the three proposed by the community consulted for the project. This document reports the results of the field study taken into account the results of the soil analysis carried out (by SASRI) on the samples collected at three depths for nine soil pits in the selected area for the project. The geographic centre of the site is near 28°56'19" South and 31°13'56" East. The site is located 537 ±10 m above sea level near the village of Bongolwane. It covers ca 5 ha. The slope of the selected area is gentle when compared to other areas in the project region (but common in the sugarcane industry), and, as consequence, the soil depth is often greater then elsewhere in the region. The bedrock of the soils of the selected site, as well as for the main part of the project area, is of amphibolite type which is uncommon in the sugarcane industry and elsewhere in South African. But the soils developed on this rock type have a high agricultural potential, like for an important part of the soils of the sugarcane industry. In the upper part of the selected area the soils are humic, clayey, rich, and between 50 - 80cm depth underlain by a strongly weathered metamorphic rock, rich in amphibolite. Mid-slope the clayey humic surface horizon of about 50 cm depth is underlain by a deep reddish brown clayey layer and at the foot slope (i.e. near the geo-structural born wetland which borders the North of the site), by a red-brownish subsoil that shows at more than 1m depth the influence of a seasonal fluctuating water table. The topsoil - which has a depth of about 50cm - is throughout the area studied of a melanic type. The B horizon which underlies the melanic A horizon is thin in the top part of the site. This makes that the soils in this part of the site are of Mayo type according to the South African soil taxonomy and are Glossic Leptic Phaozems in the WRB (World Reference Base, edition 2007) Downslope, the depth of the B horizon increases quickly. According to the SA soil classification system the B horizon is of Yellow-Brown Apedal B or unspecified type. At the footslope of the site the influence of the seasonal fluctuating watertable makes that the B horizon is underlain by a gleyic horizon with distinct signs of oxidation. Soils of the mid- and down slope part of the site could not be classified according to SASRI¿s soil handbook "Identification and management of the soils of the South Africa sugar industry at soil form level. In the WRB systems they belong to the Cambic Gleyic Phaozem Soil chemical and physical characteristics are favourable for growing of sugarcane and other crops in all parts of the site: pH slightly to moderately acid, high CEC, low N requirement, parts of the area show deficiency in potassium and phosphorus is low throughout. The soils are easy to till, are very deep (except at the top) and have probably a high waterholding capacity. The possible influence on crop growth and husbandry operations of the fluctuating depth of the water table in the bottom part of the site has to be checked

    Realist Evaluation : an overview

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    This report summarises the discussions and presentations of the Expert Seminar ‘Realist Evaluation’ with Gill Westhorp, which took place in Wageningen on March 29, 2011. The Expert Seminar was organised by the Wageningen UR Centre for Development Innovation in collaboration with Learning by Design and Context, international cooperation

    Flood Risk Management Policy in the Upper Tisza Basin: A System Analytical Approach. Simulation and Analysis of Three Flood Management Strategies

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    This report describes an integrated flood catastrophe model as well as some results of a case study made in the upper Tisza region in northeastern Hungary: the Palad-Csecsei basin (the pilot basin). The background data was provided through the Hungarian Academy of Sciences and complemented by interviews with different stakeholders in the region. Based upon these data, where a large degree of uncertainty is prevailing, we demonstrate how an implementation of a simulation and decision analytical model can provide insights into the effects of imposing different policy options for a flood risk management program in the region. We focus herein primarily on general options for designing a public-private insurance and reinsurance system for Hungary. Obviously, this is a multi-criteria and multi-stakeholder problem and cannot be solved using standard approaches. It should however be emphasized that the main purpose of this report is not to provide any definite recommendations, but rather to explore a set of policy packages that could gain a consensus among the stakeholders

    Medication review and reconciliation with cooperation between pharmacist and general practitioner and the benefit for the patient:a systematic review

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    This article systematically reviews the literature on the impact of collaboration between pharmacists and general practitioners and describes its effect on patients' health. A systematic literature search provided 1041 articles. After first review of title and abstract, 152 articles remained. After review of the full text, 83 articles were included. All included articles are presented according to the following variables: (i) reference; (ii) design and setting of the study; (iii) inclusion criteria for patients; (iv) description of the intervention; (v) whether a patient interview was performed to involve patients' experiences with their medicine-taking behaviour; (vi) outcome; (vii) whether healthcare professionals received additional training; and (viii) whether healthcare professionals received financial reimbursement. Many different interventions are described where pharmacists and general practitioners work together to improve patients' health. Only nine studies reported hard outcomes, such as hospital (re)admissions; however, these studies had different results, not all of which were statistically significant. Randomized controlled trials should be able to describe hard outcomes, but large patient groups will be needed to perform such studies. Patient involvement is important for long-term success

    Pauli graphs, Riemann hypothesis, Goldbach pairs

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    Let consider the Pauli group Pq=\mathcal{P}_q= with unitary quantum generators XX (shift) and ZZ (clock) acting on the vectors of the qq-dimensional Hilbert space via Xs>=s+1>X|s> =|s+1> and Zs>=ωss>Z|s> =\omega^s |s>, with ω=exp(2iπ/q)\omega=\exp(2i\pi/q). It has been found that the number of maximal mutually commuting sets within Pq\mathcal{P}_q is controlled by the Dedekind psi function ψ(q)=qpq(1+1p)\psi(q)=q \prod_{p|q}(1+\frac{1}{p}) (with pp a prime) \cite{Planat2011} and that there exists a specific inequality ψ(q)q>eγloglogq\frac{\psi (q)}{q}>e^{\gamma}\log \log q, involving the Euler constant γ0.577\gamma \sim 0.577, that is only satisfied at specific low dimensions qA={2,3,4,5,6,8,10,12,18,30}q \in \mathcal {A}=\{2,3,4,5,6,8,10,12,18,30\}. The set A\mathcal{A} is closely related to the set A{1,24}\mathcal{A} \cup \{1,24\} of integers that are totally Goldbach, i.e. that consist of all primes p2p2) is equivalent to Riemann hypothesis. Introducing the Hardy-Littlewood function R(q)=2C2pnp1p2R(q)=2 C_2 \prod_{p|n}\frac{p-1}{p-2} (with C20.660C_2 \sim 0.660 the twin prime constant), that is used for estimating the number g(q)R(q)qln2qg(q) \sim R(q) \frac{q}{\ln^2 q} of Goldbach pairs, one shows that the new inequality R(Nr)loglogNreγ\frac{R(N_r)}{\log \log N_r} \gtrapprox e^{\gamma} is also equivalent to Riemann hypothesis. In this paper, these number theoretical properties are discusssed in the context of the qudit commutation structure.Comment: 11 page

    “Зізнання авантюриста Фелікса Крулля” Томаса Манна як пародія на велику автобіографію

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    Статтю присвячено розгляду рецепції та відображення “Поезії і правди” Й.-В. Гете в романі Т. Манна “Зізнання авантюриста Фелікса Крулля”. Представлена розвідка продовжує ряд наукових досліджень, присвячених вивченню особливостей рецепції автобіографії Й.-В. Гете, зокрема в німецькомовному літературному просторі. При дослідженні особливостей наявного в аналізованому нами романі пародійного наслідування Й.-В. Гете основна увага зосереджується автором на його стилістичному та тематичному рівнях.Статья посвящена рассмотрению рецепции и отражения “Поэзии и правды” Й.-В. Гете в романе Т. Манна “Признания авантюриста Феликса Крулля”. Представленная статья продолжает ряд научных исследований, посвященных изучению особенностей рецепции автобиографии Й.-В. Гете в частности в немецкоязычном литературном пространстве. При изучении особенностей имеющихся в анализированном нами романе пародийного подражания Й.-В. Гете основное внимание автор сосредотачивает на его стилистическом и тематическом уровнях.The article focuses on the reception of Goethe’s “Poetry and Truth” and its reflection in T. Mann’s novel “The Confession of adventurer Felix Crool”. The given article extends the series of scientific investigations that deal with the peculiarities of Goethe’s reception in German literature. Studying the parody imitation peculiarities of Goethe in the analysed novel, the main attention is paid to the stylistic and theme levels

    Myocard Infarct en Cerebrovasculair Accident keten (MICK) studie

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    For patients with acute coronary syndrome (ACS) and stroke prompt diagnosis and treatment is essential. Before a patient reaches the hospital he may have had contact with a general practitioner (GP), a GP cooperative (GPC), ambulance service, or Emergency Department. Optimal use and efficient functioning of the acute health care chain is imperative. The aim of the MICK study is to obtain insight into circumstances in which symptoms of patients occur, medical contacts throughout the acute care chain, delays, door-to-balloon and door-to-needle time. This is a prospective observational study including 202 patients suspected of having ACS and 239 suspected of ischemic stroke. Patients filled out a questionnaire and additional data was obtained using registries.\ud Over 40% of all patients suspected of ACS waited more than 6 hours before contacting a health care provider and over 30% of all patients suspected of having a stroke waited more than 4 hours. Patients reached the hospital through many different health care chains. Once a care provider was contacted, 45% of all patients with ACS were hospitalized within 90 minutes at the CCU and 65% of patients with stroke within 4 hours at the stroke unit.\ud Most patients first contacted the GP or GPC. For patients who immediately called 112 time to hospitalization was the shortest.\ud Overall are noticeable the long patient delays in seeking care, the various chains through which patients reach the CCU or stroke unit and the different throughput times
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