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Special
Terms modified by Special Selected AbstractsHow Special Are Rural Areas?DEVELOPMENT POLICY REVIEW, Issue 4 2001The Economic Implications of Location for Rural Development Despite on-going change, rural areas remain characterised by relative abundance of natural capital, and by distance and the relatively high cost of movement. They are also home to most of the world's poor. Compared with urban areas which enjoy proximity to customers and producers, rural areas may have comparative advantage only in primary activities based on immobile natural resources and closely related activities. There are differences, however, between ,peri-urban', ,middle countryside' and ,remote' areas. In some areas, economic growth, urban expansion, and improved transport and communications create new urban-oriented opportunities for rural services and labour. Remote areas will continue to present special difficulties, however; and, in general, the potential for non-agricultural diversification is less than is sometimes argued. [source] Special Issue on ,Nonlinear Modeling, Analysis, and Simulation for Earthquake Engineering' Earthquake Engineering and Structural Dynamics (EQE)EARTHQUAKE ENGINEERING AND STRUCTURAL DYNAMICS, Issue 15 2007Gregory L. Fenves Guest Editor No abstract is available for this article. [source] Special Issue on Earthquake Engineering for Transportation StructuresEARTHQUAKE ENGINEERING AND STRUCTURAL DYNAMICS, Issue 4-5 2005Joseph Penzien Guest Editor No abstract is available for this article. [source] Doing "Development" at the World Trade Organization: The Doha Round and Special and Differential TreatmentIDS BULLETIN, Issue 3 2003Claire Melamed First page of article [source] Just How Special is Turkey in Europe?INTERNATIONAL STUDIES REVIEW, Issue 1 2009Erik Jones No abstract is available for this article. [source] Is Dementia Special Care Really Special?JOURNAL OF AMERICAN GERIATRICS SOCIETY, Issue 2 2008A New Look at an Old Question OBJECTIVES: To quantify differences in care provided to nursing home (NH) residents with dementia living on and off dementia special care units (SCUs). DESIGN: Cross-sectional study using propensity score adjustment for resident and NH characteristics. SETTING: Free-standing NHs in nonrural U.S. counties that had an SCU in 2004 (N=1,896). PARTICIPANTS: Long-stay (,90 days) NH residents with a diagnosis of Alzheimer's disease or dementia and at least moderate cognitive impairment (N=69,131). MEASUREMENTS: Resident-level NH care processes such as physical restraints, bed rails, feeding tubes, psychotropic medications, and incontinence care. RESULTS: There was no difference in the use of physical restraints (adjusted odds ratio (AOR)=0.94, 95% confidence interval (CI)=0.79,1.11), but SCU residents were less likely to have had bed rails (AOR=0.55, 95% CI=0.46,0.64) and to have been tube fed (AOR=0.36, 95% CI=0.30,0.43). SCU residents were more likely to be on toileting plans (AOR=1.23, 95% CI=1.08,1.39) and less likely to use pads or briefs in the absence of a toileting plan (AOR=0.73, 95% CI=0.61,0.88). SCU residents were more likely to have received psychotropic medications (AOR=1.23, 95% CI=1.05,1.44), primarily antipsychotics (SCU=44.9% vs non-SCU=30.0%). CONCLUSION: SCU residents received different care than comparable non-SCU residents. Most strikingly, SCU residents had greater use of antipsychotic medications. [source] Are Banks Still Special?JOURNAL OF APPLIED CORPORATE FINANCE, Issue 1 2000New Evidence on Their Role in the Corporate Capital-Raising Process Bankers appear to play a special role in providing commitment-based financing to corporations. This type of lending is important not only for small firms that lack access to public debt markets but for large and medium-size companies as well. For such companies, commitment-based financing provides access to debt capital that becomes valuable when the firm has an immediate need for funding but interest rates in public debt markets are prohibitively high, or the firm is undervalued by the market. A good example of this was provided by the Asian crisis in the last quarter of 1998, when $10 billion of commercial paper was retired and $20 billion of net new commercial loans were booked. The authors also suggest that the fact that commitment-based financing is used by larger companies when they believe themselves to be undervalued in the market is probably the best explanation of why announcements of these types of loans elicit a positive stock price reaction. [source] Teaching All Learners As If They Are SpecialNEW DIRECTIONS FOR ADULT & CONTINUING EDUCATION, Issue 93 2002Nancy F. Gadbow This chapter considers special learning needs that adult learners may bring, along with effective strategies and accommodations that can make the difference between success and failure for many learners. [source] Is Rule by Majorities Special?POLITICAL STUDIES, Issue 1 2010Hugh Ward One way of making decisions is for political associates or their representatives to vote on each issue separately in accordance with the majority principle and then take the cumulative outcomes of such majority decision making to define the collective choice for public policy. We call such a system one of majorities rule. Thought of in spatial terms, majorities rule is equivalent to the principle of making decisions according to the issue-by-issue median of voter preferences. If popular control and political equality are core democratic values, they can be rendered as requirements on a collective choice rule, involving resoluteness, anonymity, strategy-proofness and responsiveness. These requirements entail that the collective decision rule be a percentile method. If we then add a requirement of impartiality, as exhibited in a collective choice rule which would be chosen behind a veil of ignorance, then the issue-by-issue median is uniquely identified as a fair rule. Hence, majorities rule is special. Some objections to this line of reasoning are considered. [source] MENTAL HEALTH AND SEN: Mental health and special educational needs: exploring a complex relationshipBRITISH JOURNAL OF SPECIAL EDUCATION, Issue 1 2009Richard Rose The relationship between mental health and special educational needs is both complex and misunderstood. In this article, Richard Rose, Professor of Special and Inclusive Education, Marie Howley, Senior Lecturer, Ann Fergusson, Senior Lecturer, and Johnson Jament, a PhD student, all from the Centre for Special Needs Education and Research directed by Richard Rose at the University of Northampton, discuss findings from a national research project which explored the perceptions of pupil mental health needs by staff working in residential special schools. Teachers and other professional colleagues often feel ill-prepared to address mental health difficulties experienced by their pupils. This is, at times, exacerbated by a wider confusion when atypical behaviours are attributed to a diagnosed learning difficulty rather than being recognised as symptomatic of a mental health problem. The article suggests a need for clarification of the relationship between complex special educational needs and mental health and for increases in training opportunities and the development of resources for teaching about and supporting mental health and emotional well-being. [source] What Makes the Trifluoride Anion F3 - So Special?CHEMINFORM, Issue 3 2005A Breathing-Orbital Valence Bond ab initio Study. No abstract is available for this article. [source] Why Are Chinese Exports Not So Special?CHINA AND WORLD ECONOMY, Issue 1 2009Shunli Yao C43; F10; F14 Abstract Applying a commonly used index for export sophistication in a cross-country study, Rodrik finds that the technological content of Chinese exports over the past decade has been so high that it cannot be explained simply by the economic fundamentals of a low-income country abundant with unskilled labor. Question has been raised for the empirical robustness of the index. I am also doubtful with Rodrik's analysis but develop my argument from a different perspective. This paper briefly reviews Rodrik's methodology and identifies other factors his empirical results potentially hinge on. Based on this, it elaborates on China's unique processing trade regime, the uneven distribution of its exports across Chinese regions and the limitation of HS codes in terms of identifying differentiated products, in an attempt to show that these factors also contribute to higher estimations of China's export sophistication level. Finally, it organizes trade data to reveal the trade patterns that are indeed consistent with the country's comparative advantage. [source] Specials: a financial warning!PRESCRIBER, Issue 19 2008Leslie Klein MSc, MB ChB An analysis of specials prescribing in one PCT found the average cost to be £102, with prices reaching over £2000. The authors suggest how the expense of prescribing specials can be kept to a minimum. Copyright © 2008 Wiley Interface Ltd [source] Automated Negotiation from Declarative Contract DescriptionsCOMPUTATIONAL INTELLIGENCE, Issue 4 2002Daniel M. Reeves Our approach for automating the negotiation of business contracts proceeds in three broad steps. First, determine the structure of the negotiation process by applying general knowledge about auctions and domain,specific knowledge about the contract subject along with preferences from potential buyers and sellers. Second, translate the determined negotiation structure into an operational specification for an auction platform. Third, after the negotiation has completed, map the negotiation results to a final contract. We have implemented a prototype which supports these steps by employing a declarative specification (in courteous logic programs) of (1) high,level knowledge about alternative negotiation structures, (2) general,case rules about auction parameters, (3) rules to map the auction parameters to a specific auction platform, and (4) special,case rules for subject domains. We demonstrate the flexibility of this approach by automatically generating several alternative negotiation structures for the domain of travel shopping in a trading agent competition. [source] WAL-MART AND BANKS: SHOULD THE TWAIN MEET?CONTEMPORARY ECONOMIC POLICY, Issue 4 2009A PRINCIPLES-BASED APPROACH TO THE ISSUES OF THE SEPARATION OF BANKING AND COMMERCE The application in July 2005 by Wal-Mart to obtain a specialized bank charter from the state of Utah and to obtain federal deposit insurance reopened a national debate concerning the separation of banking and commerce. Though Wal-Mart withdrew its application in March 2007, the issue and the debate continue. This article offers a principles-based approach to this issue that begins with the recognition that banks are special and that safety and soundness regulation of banks is therefore warranted. Building on that recognition, the article lays out the principle that the "examinability and supervisability" of an activity should determine if that activity should be undertaken by a bank. Even if an otherwise legitimate activity is not suitable for a bank, it should be allowed for a bank's owners (whether the owners are individuals or a holding company), so long as the financial transactions between the bank and its owners are closely monitored by bank regulators. The implications of this set of ideas for the Wal-Mart case and for banking and commerce generally are then discussed. (JEL G21, G28) [source] Children, admitted to high security (special) hospitalCRIMINAL BEHAVIOUR AND MENTAL HEALTH, Issue 4 2003Adolescent Forensic Psychiatry, Claire Dimond Consultant in Child Introduction The Special Hospitals in England provide psychiatric treatment in high security. The aim of this study was to examine the demographics and background characteristics of children admitted to high security hospitals in England, using the special hospital case register. Method Forty-six children (the subject group) were admitted to a high security hospital under the MHA (1983) classification of disorder of mental illness and/or psychopathic disorder between 1983 and 1999, 33 (72%) of whom were male. A comparison group of adults was matched on sex, legal classification of detention and MHA 1983 classification of disorder. Results The children were admitted for a similar range of offences to those of the comparison group. However, the children had received convictions for criminal damage and violence at a significantly earlier age, they were more likely to have experienced a change in carer during their childhood, been placed in a children's home and were less likely to be living with a family member on their 16th birthday. Children admitted to special hospital experience a lot of disruption in their childhood and are extremely high users of multi-agency services as they grow up. Discussion Issues are raised regarding how to provide a developmentally sensitive service for children who require high security care. Copyright © 2003 Whurr Publishers Ltd. [source] Developing Countries' Position in WTO Agricultural Trade NegotiationsDEVELOPMENT POLICY REVIEW, Issue 1 2002Alan Matthews Four themes in the developing countries' position are highlighted. (i) They are seeking meaningful improvements in market access for their agricultural exports. (ii) They have highlighted the asymmetry of current WTO obligations under the Uruguay Round Agreement on Agriculture, and are seeking greater equality of outcomes in the new round. (iii) Meaningful concessions on special and differential treatment will be necessary to satisfy the interests of both exporters and importers, especially on the scope to be allowed for tariff protection to domestic food production. (iv) Innovative and reliable guarantees will need to be provided to the least developed food importers to protect them against the risk of world price volatility. [source] Age-related differences in neural correlates of face recognition during the toddler and preschool yearsDEVELOPMENTAL PSYCHOBIOLOGY, Issue 2 2003Leslie J. Carver Abstract Research on the development of face recognition in infancy has shown that infants respond to faces as if they are special and recognize familiar faces early in development. Infants also show recognition and differential attachment to familiar people very early in development. We tested the hypothesis that infants' responses to familiar and unfamiliar faces differ at different ages. Specifically, we present data showing age-related changes in infants' brain responses to mother's face versus a stranger's face in children between 18 and 54 months of age. We propose that these changes are based on age-related differences in the perceived salience of the face of the primary caregiver versus strangers. © 2003 Wiley Periodicals, Inc. Dev Psychobiol 42: 148,159, 2003 [source] Die Theorie der Intentionalität MeinongsDIALECTICA, Issue 2 2001Arkadiusz Chrudzimski The most striking feature of Meinong's theory of intentionality is his thesis that every mental act has its reference-object "beyond being and non being". This theory seems, at first, to be a clear example of the so called object-theory of intentionality, as it introduces special "postulated" entities in the target-position of the mental act. Closer examination, however, reveals in Meinong's works important elements of the mediator-theory. Meinong speaks of auxiliary incomplete objects situated "between" the subject and the object of reference and "mediating" the intentional access to the (complete) reference-object. Moreover, even if the object of reference is of the simple nominal form, the mediating structure involves essentially propositional entities (objectives). In the paper we attempt to give a set-theoretical interpretation of Meinong's theory in the frame of which we could eventually do without the incomplete mediating objects. Yet, some general epistemological considerations suggest the indispensability of such incomplete mediating structures. [source] Maximizing the use of Project Bioshield contracting opportunitiesDRUG DEVELOPMENT RESEARCH, Issue 4 2009Dana B. Pashkoff Abstract This article explores the often complicated relationship between agency policymakers and the contracting officers that are charged with executing agency procurements. In particular, the article explores the role of the contracting officer in maximizing the use of streamlined contracting practices under the Project BioShield Act of 2004 (Public Law 108,276). Project BioShield, which is implemented through the Biomedical Advanced Research and Development Authority (BARDA) within the Department of Health and Human Services (DHHS), is designed to encourage procurement activity that protects Americans against a chemical, biological, radiological or nuclear attack. To do so, the Act permits the use of special streamlined contracting authorities, many of which are often unused or ignored by the contracting officers engaged in executing and administering Project BioShield procurements. This article argues that these contracting officers are bound to conduct their duties within the confines of overall agency policy, and they cannot use their contracting discretion to circumvent that policy. As a result, DHHS contracting officers are required to use the Project BioShield streamlined contracting methods. In order to assist the agency in encouraging the use of these procedures, this article also recommends techniques that BARDA can apply in order to encourage contracting officers to take advantage of these contracting opportunities and advance agency's policy with respect to Project BioShield. Drug Dev Res 70:234,238, 2009. © 2009 Wiley-Liss, Inc. [source] Introduction to the special issue on sediment transport dynamicsEARTH SURFACE PROCESSES AND LANDFORMS, Issue 13 2001Michael Church No abstract is available for this article. [source] The Dependence of the Sensitivity and Reliability of Contactless Conductivity Detection on the Wall Thickness of Electrophoretic Fused-Silica CapillariesELECTROANALYSIS, Issue 3-5 2009Petr T Abstract A contactless conductivity detector (C4D) performance has been tested on a simple capillary electrophoretic separation in a standard fused-silica capillary with an external diameter of 360,,m and in a thin-walled capillary (an external diameter of 150,,m); the internal diameters of the two capillaries were identical, equal to 75,,m. Potassium and sodium ions have been separated in a morpholinoethanesulfonic acid/histidine background electrolyte (MES/His), over a wide range of its concentrations (0,100,mM). At low MES/His concentrations, the C4D response, obtained from the height of the potassium peak, is by 100 to 200 per cent higher for the thin-walled capillary and the calibration dependences are linear, in contrast to the thick-walled capillary. These differences between the two capillaries decrease with increasing MES/His concentration, the C4D response in the thin-walled capillary is then higher by mere 20 per cent and the calibration dependences are linear in both the capillaries. The highest sensitivities have been obtained at a MES/His concentration of 50,mM, with LOD values for potassium ion of 2.0 and 2.6,,M, in the thin- and thick-walled capillaries, respectively. The signal-to-noise ratios and the plate counts are generally similar for the two capillaries. It follows from the results that special thin-walled capillaries can be advantageous when background electrolytes with very low conductivities must be employed. [source] Cover Picture: Electrophoresis 14'2010ELECTROPHORESIS, Issue 14 2010Article first published online: 21 JUL 2010 Issue no. 14 is a "mini special issue" on "Microscale Separation Methods for Metabolomics" comprising 9 manuscripts on metabolomics and 12 manuscripts on various topics in nucleic acids, biomarkers, proteomics, miniaturization, etc. Part I has 9 manuscripts on metabolomics featuring new technological developments and the potential of CE-MS, targeted analysis of one class of metabolites and non-targeted analysis, and data interpretation that is essential to acquire useful biological information. In short, the importance of CE and, generally, of microscale separation methods for metabolomics is rapidly increasing and the papers published in this issue give an overview of this field. Part II has 2 research papers on biomarkers while Part III is on various aspects of nucleic acids including but not limited to genotyping, PCR, SSCP, PCR and detection of DNA. Part IV describes various aspects of fundamentals and methodology in microfluidics, cell lysates by 2-DE, CE-LIF of plasmid DNA, whole blood assay of trypsin activity, etc. [source] Cover Picture: Electrophoresis 7'2010ELECTROPHORESIS, Issue 7 2010Article first published online: 26 MAR 2010 Issue no. 7 is a special issue on CE-MS consisting of "19 manuscripts subdivided into three major categories: one devoted to instrumental and methodical advances, two providing an insight into up-to-date applications from the fields of technical and natural products, food and environmental analysis on the one hand and biomedical and pharmaceutical analysis on the other hand. Diverse approaches how CE-MS can be employed for the solution of various analytical problems can be found in these papers. Different modes of electroseparation techniques in the capillary format such as CZE, CEC or MEEKC are coupled to various MS instruments ranging from simple quadrupole MS instruments to state of the art QTOF's, using a range of interfaces such as ESI, ICP or APPI. So this special issue will again try to present an overview of current trends and developments in the fields of CE-MS" [source] Cover Picture: Electrophoresis 16'09ELECTROPHORESIS, Issue 16 2009Article first published online: 18 AUG 200 Issue no. 16 is a special on "Enantioseparations". It consists of 19 research papers and 2 review articles distributed over 4 different parts. The two review articles make up Part I and focus on recent developments in microchip enantioseparations and chiral analysis of drugs, metabolites and biomarkers in biological samples. The 19 research papers are distributed over the remaining 3 parts including "Fundamentals and Methodologies", "Chiral Capillary Electrochromatography" and "Biomedical, Pharmaceutical, Food and Environmental Applications of Electromigration Techniques". Issue no. 16 also includes a Fast Track paper on the "Analysis of genetic variation in Globocephaloides populations from macropodid marsupials using a mutation scanning-based approach". [source] Cover Picture: Electrophoresis 8/2008ELECTROPHORESIS, Issue 8 2008Article first published online: 17 APR 200 Regular issues provide a wide range of research and review articles covering all aspects of electrophoresis. Here you will find cutting-edge articles on methods and theory, instrumentation, nucleic acids, CE and CEC, miniaturization and microfluidics, proteomics and two-dimensional electrophoresis. On April 2 Professor Hjertén celebrated his 80th birthday, and it is an honor to take this opportunity to congratulate him on this special occasion and at the same time on his fruitful work. Stellan Hjertén's distinguished personality in research and life makes this celebration very special. It is therefore appropriate to devote a separate laudation in ELECTROPHORESIS to his achievements through which he has attained renown within the separation science community: indeed, he is considered undoubtedly to be the "Father of Capillary Electrophoresis". Professor Hjertén's preliminary work with Arne Tiselius motivated him to commit his career to electrophoresis: the development of free zone electrophoresis certainly revolutionized separation science, and since the construction of the first "capillary electrophoresis" equipment, one of the most cited works in this field carries his name. His friends were very keen to contribute manuscripts to this Issue, covering almost all areas in which Professor Hjertén has worked in his distinguished career. [source] A New Spherical Metallacryptate Compound [Na{Cu6(Thr)8(H2O)2(ClO4)4}]·ClO4·5,H2O: Magnetic Properties and DFT CalculationsEUROPEAN JOURNAL OF INORGANIC CHEMISTRY, Issue 13 2005Sheng-Chang Xiang Abstract The hexanuclear copper(II) complex with threoninato acid has been synthesized. Its structure can be described as an octahedron cage with D2h symmetry in which six copper ions are bound by eight threoninato acids with a [3.11223130] coordination mode and one Na+ cation being captured within the center of the cage. In contrast with other hexanuclear copper compounds containing amino acids, the title compound has a prolate Cu6 octahedron with the longest axial distance and a rectangle equatorial plane, as well as special coordinated perchlorate ions. Compared with classic cryptate, hexanuclear copper(II) compounds with amino acids can be regarded as a new topologic type of spherical macrotricyclic metallacryptates [2,2,2,2] whose cages have a high selectivity for sodium ions. The analysis of magnetic susceptibility data shows that the threoninato compound has a ground state with spin S = 3. The computing coupling constant between the equatorial Cu centers and the axial ones is 4.4 cm,1,calculated by using DFT methods for a model compound. This is close to three known experimental values of 1.39, 0.56 or 0.43 cm,1 for complexes with 4-hydroxy- L -prolinato, L -prolinato or L -threoninato acid as ligands, respectively. The dominant ferromagnetic interactions for these complexes can be essentially attributed to the orthogonality between the magnetic orbitals, dxz or dyz orbitals for the equatorial CuII centers and d orbitals for the axial ones. (© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2005) [source] LINEAGES WITH LONG DURATIONS ARE OLD AND MORPHOLOGICALLY AVERAGE: AN ANALYSIS USING MULTIPLE DATASETSEVOLUTION, Issue 4 2007Lee Hsiang Liow Lineage persistence is as central to biology as evolutionary change. Important questions regarding persistence include: why do some lineages outlive their relatives, neither becoming extinct nor evolving into separate lineages? Do these long-duration lineages have distinctive ecological or morphological traits that correlate with their geologic durations and potentially aid their survival? In this paper, I test the hypothesis that lineages (species and higher taxa) with longer geologic durations have morphologies that are more average than expected by chance alone. I evaluate this hypothesis for both individual lineages with longer durations and groups of lineages with longer durations, using more than 60 published datasets of animals with adequate fossil records. Analyses presented here show that groups of lineages with longer durations fall empirically into one of three theoretically possible scenarios, namely: (1) the morphology of groups of longer duration lineages is closer to the grand average of their inclusive group, that is, their relative morphological distance is smaller than expected by chance alone, when compared with rarified samples of their shorter duration relatives (a negative group morpho-duration distribution); (2) the relative morphological distance of groups of longer duration lineages is no different from rarified samples of their shorter duration relatives (a null group morpho-duration distribution); and (3) the relative morphological distance of groups of longer duration lineages is greater than expected when compared with rarified samples of their shorter duration relatives (a positive group morpho-duration distribution). Datasets exhibiting negative group morpho-duration distributions predominate. However, lineages with higher ranks in the Linnean hierarchy demonstrate positive morpho-duration distributions more frequently. The relative morphological distance of individual longer duration lineages is no different from that of rarified samples of their shorter duration relatives (a null individual morpho-duration distribution) for the majority of datasets studied. Contrary to the common idea that very persistent lineages are special or unique in some significant way, both the results from analyses of long-duration lineages as groups and individuals show that they are morphologically average. Persistent lineages often arise early in a group's history, even though there is no prior expectation for this tendency in datasets of extinct groups. The implications of these results for diversification histories and niche preemption are discussed. [source] (RE)MAPPING INDIGENOUS ,RACE'/PLACE IN POSTCOLONIAL PENINSULAR MALAYSIA,GEOGRAFISKA ANNALER SERIES B: HUMAN GEOGRAPHY, Issue 3 2006Alice M. Nah ABSTRACT. This paper focuses on how indigeneity has been constructed, deployed and ruptured in postcolonial Malay(si)a. Prior to the independence of Malaya in 1957, British colonial administrators designated certain groups of inhabitants as being ,indigenous' to the land through European imaginings of ,race'. The majority, politically dominant Malays were deemed the definitive peoples of this geographical territory, and the terrain was naturalized as ,the Malay Peninsula'. Under the postcolonial government, British conceptions of the peninsula were retained; the Malays were given political power and recognition of their ,special (indigenous) position' in ways that Orang Asli minorities,also considered indigenous - were not. This uneven recognition is evident in current postcolonial political, economic, administrative and legal arrangements for Malays and Orang Asli. In recent years, Orang Asli advocates have been articulating their struggles over land rights by drawing upon transnational discourses concerning indigenous peoples. Recent judicial decisions concerning native title for the Orang Asli potentially disrupt ethno-nationalist assertions of the peninsula as belonging to the ,native' Malays. These contemporary contests in postcolonial identity formations unsettle hegemonic geopolitical ,race'/place narratives of Peninsular Malaysia. [source] BEAM , Geoelectrical Ahead Monitoring for TBM-DrivesGEOMECHANICS AND TUNNELLING, Issue 5 2008Arnim Kaus Dr. rer.nat. BEAM is a non-intrusive focused-electrical induced polarisation ground prediction technique, permanently operating while TBM tunnelling. Main components of the survey system are the measuring unit placed in the TBM operator cabin and special adapted excavation tools which are used as electrodes. The unit is connected to the guidance system and receives the boring signal which allows fully automatic data acquisition and visualisation in real-time on an integrated monitor. Communication facilities transfer the forecast results to every accredited computer world wide simultaneously. Based on the measuring data the percentage frequency effect PFE and the resistivity R, an advanced evaluation software is established for geoelectrical-geological/hydrogeological classification and interpretation. Selected case studies from international TBM projects are outlined with prediction results of different kinds of exploration targets and geological situations. Since 2000 the geophysical probing system is fulfilling the practical demands under the rough and various conditions of TBM tunnelling work by indicating reliable results in hard rock as well as in soft ground. BEAM , Geoelektrische Vorauserkundung für TBM-Vortriebe BEAM ist eine zerstörungsfreie, vortriebsbegleitende Baugrund-Vorauserkundungs-Technologie auf Basis der fokussierend-elektrischen induzierten Polarisation. Das Monitoring-System besteht hauptsächlich aus einem Messgerät, das in der Steuerkabine aufgestellt werden kann, und aus speziell angepassten, bauseits vorhandenen Abbauwerkzeugen und Sicherungsmitteln, die als Elektroden dienen. Die Messeinheit wird mit dem bestehenden Vermessungssystem verbunden und empfängt das Bohrsignal, sodass vollautomatisierte Messungen durchgeführt werden, ohne die Tunnelvortriebsarbeiten zu stören, bei gleichzeitiger Datenauswertung und Visualisierung der Ergebnisse in Echtzeit auf dem integrierten Bildschirm der Einheit. Durch Anschluss an die Kommunikationseinrichtungen der Baustelle lassen sich die Vorauserkundungsdaten zeitgleich an jeden akkreditierten Computer weltweit transferieren. Eine innovative Auswertesoftware bewerkstelligt die geoelektrisch-geologische/hydrogeologische Klassifikation und Interpretation, die auf den Messparametern Prozent Frequenz Effekt PFE und dem Widerstand R basiert. Ausgewählte Fallbeispiele aus internationalen TBM-Projekten zeigen Vorauserkundungsergebnisse unterschiedlicher Explorationsziele und geologischer Situationen. Seit 2000 ist das Vorauserkundungssystem in der Anwendung und zeigt, dass es unter den schwierigen und unterschiedlichen Bedingungen im mechanisierten Tunnelbau sowohl im Hartgestein als auch im Lockergestein im Dauereinsatz zuverlässige Ergebnisse erbringt. [source] | |||||||||||||||||||||||||||||||||||||