Substancinė Dievo formos kaita kaip meninė Visybės reprezentacija (pagal Thomo Manno romaną Juozapas ir jo broliai | Substanziales Werden der Form Gottes als künstleriche Repräsentation des Ganzen (nach der Tetralogie Joseph und seine Brüder von Thomas Mann

Directory of Open Access Journals (Sweden)

Juldita Nagliuvienė

2004-01-01

Full Text Available Anhand der Polemik zwischen der Totalitätsphänomenologie von Emmanuel Lévinas und der Selbstphänomenologie von Ernst Bloch werden in diesem Artikel die Erscheinungen Gottes, mit denen sich das patriarchalische Subjekt in die Beziehung eingetreten ist, analysiert. Vor allem aktualisiert man den substanziellen Inhalt der künstlerichen Gottesform, deren Wurzeln in der primitiven archaischen Ikonographie der Babylonier und der Ägypter liegen. Das Bild Gottes verwandelt sich in der Situation der Begegnung aus der Substanz des unförmigen Steines, die pfallische Intentionen des Helden akzentuiert, in die symbiotische Form eines Menschentieres (oder Gottes-Tieres, das als Fremde Gott auf der Ebene der Erzählung funktioniert und den Numenaspekt durch die künstliche Form der animalischen Gottheit in sich trägt. Durch die Maske des Tieres strebt der göttliche Begegnungspartner, der das Werden Gottes aktualisiert, nach der Verwandlung in die Gestalt eines sterbenden und wieder auferstehenden Menschen-Gottes, der den sündigen Menschen erlösen kann. In der Tetralogie von Thomas Mann existiert diese Ebene des Nochnicht-gewordenen-Gottes als utopische Stufe der vollkommenen Beziehungen zwischen Mensch und Gott. Die Begegnung zwischen dem tierischen Gott und dem Helden geschieht im Roman in der Traumsphäre, die den Dialog zwischen dem Kunstding und dem Menschen möglich macht. Auf der Traumebene wird der Prozess der Metamorphose einer Gottheit dargestellt, aber sie erscheint als ein schon verwandeltes Wesen, das die Antropomorphie des Erlösungsprinzips aufnimmt, und dem Helden erst im bewussten Zustand begegnet.

Illustrations to “Gespräche in dem Reiche derer Todten zwischen dem vortreflichen Moscowitischen Czaar Petro Magno und dem grossen Tyrannen Ivan Basilowiz II” (Peter the Great and Ivan the Terrible) by David Fassmann (1725)

OpenAIRE

Ekaterina A. Skvortcova

2017-01-01

The journal created by David Fassmann (1683–1744), Gespräche in dem Reiche derer Todten, edited in Leipzig, was a huge success. Each of the 240 issues presents a dialogue between two historical figures from the afterworld. In the 83rd–86th Entrevuë, the interlocutors are Peter the Great and Ivan the Terrible. The texts of the four conversations were thoroughly examined by Eckhard Matthes (1987). The present paper explores how the illustrations to the 83rd–86th Entrevuë visualize the texts, w...

Biologisch-dynamische Forschung zwischen "wissenschaftlicher Weltsicht" und "Ideologie"

OpenAIRE

Eysel, Georg

2002-01-01

Der Beitrag zeigt den Konflikt zwischen "wertefreier" Wissenschaft und "ganzheitlicher" Forschung auf. Ein Zusammenspiel bio-dynamischer Forschung und der Anthroposophie mit anderen Disziplinen könnte einen Beitrag zu einem neuen Wissenschaftsbegriff mit umfassender Weltanschauung leisten. Dialog, Verständnis, Toleranz, Offenheit, kritisches Hinterfragen und Mut zur sinnvollen Anpassung sind dafür notwendige Schritte.

Pollutants from road traffic and breathing problems in children; Schadstoffe aus dem Strassenverkehr und Atemwegsbeschwerden bei Kindern

Energy Technology Data Exchange (ETDEWEB)

Mutius, E. von [Muenchen Univ. (Germany). Dr. von Haunersche Kinderklinik

1996-06-01

So far, there ave been few studies on measurable health effects of emissions from road traffic. An analysis of the available studies yields no clear indication of a relationship between road traffic emissions and the incidence of asthma and allergies in infants. On the other hand, there are no valid data on individual pollutant exposure of infants in the framework of epidemiological studies which take account of other influencing factors.(orig./MG) [Deutsch] Der Frag, ob eine Schadstoffbelastung durch den Strassenverkehr einen messbaren schaedigenden Effekt auf die menschliche Gesundheit hat, ist bislang in wenigen Studien nachgegangen worden. Analysiert man die vorliegenden Studien, ergibt sich derzeit kein eindeutiger Hinweis auf einen starken Zusammenhang zwischen der Strassenverkehrsbelastung und dem Auftreten von Asthma und Allergien beim Kind. Allerdings fehlt es an validen Daten zur individuellen Schadstoffexposition bei Kindern im Rahmen epidemiologischer Studien, ie eine Beruecksichtigung anderer Einfluss- und Stoervariablen erlauben. (orig/MG)

Eine polizeiliche ‚Moral‘ der Demütigung. Nebeneffekte der ‚Kriminalitätsbekämpfung‘ in einem französischen Vorort

Directory of Open Access Journals (Sweden)

Mélina Germes

2014-10-01

Full Text Available Im Anschluss an eine langfristige ethnographische Beobachtung der Arbeit einer Brigade Anti-Criminalité (Einheit zur Kriminalitätsbekämpfung; im Folgenden: BAC in einem Pariser Vorort zwischen 2005 und 2007 hat der Anthropologe Didier Fassin im Jahr 2011 das Buch La force de l'ordre. Une anthropologie de la police des quartiers veröffentlicht, das zu einem Meilenstein in der französischen Polizeiforschung geworden ist und einen wichtigen Beitrag auch zur öffentlichen Debatte geleistet hat. Diese Debatte um das Polizieren der ,Viertelʼ beschäftigt sich mit den diskursiven, organisatorischen und alltagsweltlichen Hintergründen der Polizeiarbeitum wiederholte Identitätskontrollen, ethnischen Diskriminierung und exzessiver Gewaltanwendung zu beschreiben und einzuordnen. Ziel der Untersuchung Fassins in Kontext dieser Debatte ist es, die Polizeiarbeit in den ,Viertelnʼ zu begleiten, zu hinterfragen sowie zu erklären, was diese Polizeiarbeit über die französische Gesellschaft aussagt. Der für dieses Heft von s u b \\ u r b a n übersetzte Auszug aus dem vierten Kapitel seines Buches reflektiert den Begriff von ,Gewaltʼ (zu weiteren Begriffserläuterung vgl. den Textauszug von Fassin in Bezug auf die Polizeiarbeit und unterscheidet zwischen physischer, körperlicher Gewalt und unsichtbaren Formen von psychischer und verbaler Gewalt.  

Numerical modelling of powder caking at REV scale by using DEM

Science.gov (United States)

Guessasma, Mohamed; Silva Tavares, Homayra; Afrassiabian, Zahra; Saleh, Khashayar

2017-06-01

This work deals with numerical simulation of powder caking process caused by capillary condensation phenomenon. Caking consists in unwanted agglomeration of powder particles. This process is often irreversible and not easy to predict. To reproduce mechanism involved by caking phenomenon we have used the Discrete Elements Method (DEM). In the present work, we mainly focus on the role of capillary condensation and subsequent liquid bridge formation within a granular medium exposed to fluctuations of ambient relative humidity. Such bridges cause an attractive force between particles, leading to the formation of a cake with intrinsic physicochemical and mechanical properties. By considering a Representative Elementary Volume (REV), the DEM is then performed by means of a MULTICOR-3D software tacking into account the properties of the cake (degree of saturation) in order to establish relationships between the microscopic parameters and the macroscopic behaviour (tensile strength).

Numerical modelling of powder caking at REV scale by using DEM

Directory of Open Access Journals (Sweden)

Guessasma Mohamed

2017-01-01

Full Text Available This work deals with numerical simulation of powder caking process caused by capillary condensation phenomenon. Caking consists in unwanted agglomeration of powder particles. This process is often irreversible and not easy to predict. To reproduce mechanism involved by caking phenomenon we have used the Discrete Elements Method (DEM. In the present work, we mainly focus on the role of capillary condensation and subsequent liquid bridge formation within a granular medium exposed to fluctuations of ambient relative humidity. Such bridges cause an attractive force between particles, leading to the formation of a cake with intrinsic physicochemical and mechanical properties. By considering a Representative Elementary Volume (REV, the DEM is then performed by means of a MULTICOR-3D software tacking into account the properties of the cake (degree of saturation in order to establish relationships between the microscopic parameters and the macroscopic behaviour (tensile strength.

Zusammenhang zwischen Ölpreisentwicklung und der Aktienperformance börsennotierter Logistikdienstleister

DEFF Research Database (Denmark)

Hofmann, Erik; Prockl, Günter

2017-01-01

Auf Basis von einfachen Methoden werden zwei konträre Thesen untersucht zum möglichen Zusammenhang zwischen der Aktienkursperformance von Logistikdienstleistern und der Ölpreisentwicklung als ein wesentlicher Kostenfaktor – speziell für Transportdienstleistungen. Neben Gesamtauswertungen einer gl...

»Meine Tochter […] soll alles lernen, was die weissen Mädchen lernen…«. »Schwarze« Perspektiven auf Deutschland um 1900

Directory of Open Access Journals (Sweden)

Josch Lampe

2015-11-01

Full Text Available Der Artikel untersucht zwei gegensätzliche »schwarze« Perspektiven auf Deutschland um 1900. Ein Vergleich zwischen dem aus dem ehemaligen Deutsch-Südwestafrika stammenden Friedrich Maharero und dem Togolesen Nayo Bruce zeigt, inwiefern zwei unterschiedliche Standpunkte im kolonialen Kontext nicht nur die Umkehrperspektiven kolonialer Strukturen verdeutlichen, sondern in ihrer Verschiedenheit auch die Komplexität der Thematik darlegen.

Rudolf Streinz. Meinungs- und Informationsfreiheit zwischen Ost und West / Henn-Jüri Uibopuu

Index Scriptorium Estoniae

Uibopuu, Henn-Jüri, 1929-2012

1983-01-01

Tutvustus: Streinz, Rudolf. Meinungs- und Informationsfreiheit zwischen Ost und West : Möglichkeiten und Grenzen intersystemarer völkerrechtlicher Garantien in einem systemkonstituierenden Bereich. Ebelsbach : Rolf Gremer, 1981

Die FPÖ im internationalen Vergleich - Zwischen Rechtspopulismus, Deutschnationalismus und Österreich-Patriotismus

Directory of Open Access Journals (Sweden)

Anton Pelinka

2002-04-01

Full Text Available Die Freiheitliche Partei Österreichs (FPÖ fällt im europäischen Kontext deshalb auf, weil sie die erfolgreichste der Parteien ist, die mit dem Begriff "Rechtspopulismus" bezeichnet werden. Der Beitrag versucht, die Erfolge der FPÖ bei Wahlen aus den Rahmenbedingungen des österreichischen politischen Systems und der österreichischen Gesellschaft zu erklären. Das als "hyperstabil" bezeichnete politische System Österreichs hat in den letzten 20 bis 25 Jahren signifikante Veränderungen durchgemacht. Die Erfolge der FPÖ sind eine Begleiterscheinung dieser Veränderungen - weder deren Ursache, noch deren Auslöser. Dies wird umso deutlicher, wenn die Veränderungen der österreichischen Gesellschaft und ihrer politischen Kultur in die Analyse einbezogen werden: Zuerst begann sich die Loyalität innerhalb der politisch-weltanschaulichen Lager aufzulösen - und dann erst begann der Aufstieg der FPÖ von einer kleinen, um Respektabilität bemühten Partei zu einer ihre Außenseiterrolle betonenden Protestpartei. Die Besonderheit der FPÖ, die sich auch in der europäischen Reaktion auf ihre Regierungsbeteiligung seit dem Februar 2000 äußerte, muss auch aus der Vorgeschichte der Zweiten Republik allgemein und der Freiheitlichen Partei im besonderen erklärt werden. Darin spiegelt sich auch der Zusammenhang zwischen der Entwicklung österreichischer Identität von einer transnationalen über eine deutschnationale zu einer spezifisch österreichischen nationalen Identität. Die in dieser Entwicklung zum Ausdruck kommenden Brüche werden in der Widersprüchlichkeit der FPÖ zugespitzt verdeutlicht: In ihren deutschnationalen Wurzeln verkörpert die FPÖ die Absage an die Konvergenz von Staat und Nation; in ihrer "populistischen" Orientierung ist die Partei aber österreichisch-patriotisch. Die FPÖ ist schließlich auch in der sozialen Struktur ihrer Wählerschaft zu begreifen: Die Partei artikuliert vor allem die Interessen der

Rigiscan®-Monitoring der Erektion unter audiovisueller sexueller Stimulation ohne/mit Viagra™ bei Patienten mit erektiler Dysfunktion

Directory of Open Access Journals (Sweden)

Perabo FGE

2000-01-01

Full Text Available Die orale Medikation mit Sildenafil (Viagra™ hat sich zur Therapie der erektilen Dysfunktion etabliert und relativiert die Differentialdiagnose zwischen psychogener und organischer Dysfunktion mit den entsprechenden therapeutischen Konsequenzen. Diesem Problem widmet sich diese Studie zur Prüfung der erektilen Antwort unter RigiScan®-Monitoring ohne/mit 50 mg Viagra™. 64 Patienten (mittleres Alter 48 Jahre mit einer erektilen Dysfunktion arteriogener (n = 10, venöser (n = 7, gemischt neurogen/vaskulärer (n = 15 und psychogener (n = 32 Genese von mehr als 6 Monaten Dauer wurden in die Studie aufgenommen. Alle Patienten wurden eingehend diagnostisch abgeklärt, inklusive Hormonlabor, dynamischer Pharmako-Duplexsonographie und, falls indiziert, mit einer Cavernosometrie/ -graphie. Zur Testung der penilen Rigidität und zur Objektivierung der Erektion wurde das "real-time" RigiScan® verwendet. In zwei konsekutiven Messungen wurden sowohl die direkte erektile Antwort auf visuelle Stimulation als auch die nächtlichen Erektionen abgeleitet und die Meßergebnisse mit den Begleiterkrankungen, "lifestyle"-Faktoren und dem Ergebnis der Pharmako-Duplexsonographie korreliert. Es fand sich keine Korrelation zwischen der Ätiologie der erektilen Dysfunktion in bezug auf organische oder psychogene Genese und dem Alter der Patienten, der Dauer der Erektionsstörung, dem Nikotinabusus, den Blutfetten, den Testosteronwerten, dem klinischen Ergebnis der Pharmakotestung (Erektionsgrad und dem duplexsonographisch gemessenen Fluß der penilen Arterien. Hingegen zeigte sich eine positive Korrelation zwischen Genese der erektilen Dysfunktion (organisch bzw. psychogen und dem RigiScan®-Meßergebnis (r = 0,29. Patienten mit psychogen bedingter Erektionsstörung profitierten am meisten von Viagra™, während Patienten mit vaskulärer Genese oder gemischt neurogener/vaskulärer Genese deutlich schlechter auf Viagra™ ansprachen. Es bestand keine Korrelation

Coastal DEMs with Cross-Track Interferometry

NARCIS (Netherlands)

Greidanus, H.S.F.; Huising, E.J.; Platschorre, Y.; Bree, R.J.P. van; Halsema, D. van; Vaessen, E.M.J.

1999-01-01

Digital elevation models (DEMs) are produced from airborne radar cross-track interferometric measurements. Radar DEMs recorded from perpendicular orientations are intercompared, and compared to DEMs derived from airborne laser altimetry

["Schleichwege" : inoffizielle Begegnungen sozialistischer Staatsbürger zwischen 1956 und 1989] / Oliver Pagel

Index Scriptorium Estoniae

Pagel, Oliver, 1984-

2013-01-01

Arvustus: "Schleichwege" : inoffizielle Begegnungen sozialistischer Staatsbürger zwischen 1956 und 1989. Hrsg. von Włodzimierz Borodziej, Jerzy Kochanowski, Joachim von Puttkamer. Böhlau Verlag. Köln, Weimar und Wien 2010

Renaissance des Mittelalters (Teil 2) : oder Alte Fragen mit Neuen Antworten

NARCIS (Netherlands)

drs. Frans van den Reep

2014-01-01

Frans van der Reep widmete sich im ersten Teil seines Kommentars (KM Magazin, Nr. 90, Juni 2014) den überraschenden Parallelen zwischen dem digitalen Heute und dem weit entfernten, mittelalterlichen Gestern. In dieser Ausgabe setzt er dies fort und führt die Gedankenkette hin zu den Ähnlichkeiten

ArcticDEM Validation and Accuracy Assessment

Science.gov (United States)

Candela, S. G.; Howat, I.; Noh, M. J.; Porter, C. C.; Morin, P. J.

2017-12-01

ArcticDEM comprises a growing inventory Digital Elevation Models (DEMs) covering all land above 60°N. As of August, 2017, ArcticDEM had openly released 2-m resolution, individual DEM covering over 51 million km2, which includes areas of repeat coverage for change detection, as well as over 15 million km2 of 5-m resolution seamless mosaics. By the end of the project, over 80 million km2 of 2-m DEMs will be produced, averaging four repeats of the 20 million km2 Arctic landmass. ArcticDEM is produced from sub-meter resolution, stereoscopic imagery using open source software (SETSM) on the NCSA Blue Waters supercomputer. These DEMs have known biases of several meters due to errors in the sensor models generated from satellite positioning. These systematic errors are removed through three-dimensional registration to high-precision Lidar or other control datasets. ArcticDEM is registered to seasonally-subsetted ICESat elevations due its global coverage and high report accuracy ( 10 cm). The vertical accuracy of ArcticDEM is then obtained from the statistics of the fit to the ICESat point cloud, which averages -0.01 m ± 0.07 m. ICESat, however, has a relatively coarse measurement footprint ( 70 m) which may impact the precision of the registration. Further, the ICESat data predates the ArcticDEM imagery by a decade, so that temporal changes in the surface may also impact the registration. Finally, biases may exist between different the different sensors in the ArcticDEM constellation. Here we assess the accuracy of ArcticDEM and the ICESat registration through comparison to multiple high-resolution airborne lidar datasets that were acquired within one year of the imagery used in ArcticDEM. We find the ICESat dataset is performing as anticipated, introducing no systematic bias during the coregistration process, and reducing vertical errors to within the uncertainty of the airborne Lidars. Preliminary sensor comparisons show no significant difference post coregistration

Business-Intelligence-Systeme im Spannungsfeld zwischen Usability und Sicherheit

OpenAIRE

Hinck, Thorsten

2010-01-01

Business-Intelligence-Systeme stehen im Spannungsfeld zwischen Usability und Sicherheit. Die Gefahren und Sicherheitsmaßnahmen für Informationssysteme werden ermittelt und ökonomisch in Bezug zur Gebrauchstauglichkeit gesetzt. Es entsteht ein Sicherheitsprofil für Business-Intelligence-Systeme. Business-Intelligence-Systems are in tension between Usability and IT-Security. Risks and safety measures of informationsystems are defined and set in (economic) regard to Usability. A security prof...

Der Ausbau des Hochrheins zur Schifffahrtsstraße - Die Geschichte eines gescheiterten Großprojekts

OpenAIRE

Steiner, Rudolf

2006-01-01

Die vorliegende Arbeit befasst sich mit Genese, Verfall und Scheitern eines der ehrgeizigsten technischen Großprojekte des 20. Jahrhunderts im süddeutschen Raum – dem Ausbau des Rheinabschnitts zwischen Basel und dem Bodensee zu einer schiffbaren Wasserstraße. Hatte es bereits seit dem Mittelalter mehrere erfolglose Versuche gegeben, die zahlreichen natürlichen Hindernisse auf dem Hochrhein, wie die genannte Strecke bezeichnet wird, zum Zwecke einer durchgängigen Schifffahrt bis zum Bodensee ...

Landbrugets trædemølle

DEFF Research Database (Denmark)

Hansen, Henning Otte

2016-01-01

Teorien om landbrugets trædemølle siger, at teknologi medfører stigende produktivitet, stigende udbud og dermed faldende priser. Dermed øges behovet for ny teknologi. Det vedvarende teknologipres gavner de innovative landmænd, mens de mere afventende landmænd kun oplever de negative virkninger i...... form af prisfald. I denne artikel beskrives nærmere de enkelte elementer i trædemøllen. Samtidig vurderes trædemøllens betydning og mulige påvirkning. Det konkluderes, at trædemøllen, dens forudsætninger og afledte virkninger stadig er fuldt gældende. Det er ikke muligt for et enkelt land eller region...... af bremse trædemøllen på lang sigt. På lokalt plan kan man løse nogle sociale og økonomiske problemer skabt af trædemøllen gennem nemmere afvandring....

Review Essay: Das dialogische Selbst zwischen simultaner Pluralität und Halt verleihenden Sprachpraktiken

Directory of Open Access Journals (Sweden)

Marie-Cécile Bertau

2015-09-01

Full Text Available "Das dialogische Selbst" von Frank-M. STAEMMLER ist ein wichtiger Beitrag zu einem dialogischen Menschenbild, das von verschiedenen Seiten als Alternative zur methodologischen Individualismus formuliert wird. Der Zusammenhang zwischen einer dialogischen Theorie des Selbst und konkreten therapeutischen Techniken wird einleuchtend hergestellt; klar wird dabei, dass dialogisches Denken eine Herausforderung an tradierte Denkmuster ist. Es sabotiert die Denkfigur der "abgelösten Vorgängigkeit" (BERTAU 2015 (von "Ich", "Selbst" zugunsten des je tatsächlichen Geschehens. Allerdings können Pluralität und Dynamik, Performativität und Gegenwärtigkeit des Geschehens ihrerseits nicht beliebig sein und bloß emergent, sie erfahren vielmehr eine Struktur, ohne die sie nicht (wieder- erkennbar wären. Wie das Verhältnis von Geschehen und Struktur zu denken ist, scheint mir eine der Kernfragen des dialogischen Denkens zu sein. Nach einer formalen Betrachtung und inhaltlichen Übersicht des Buchs diskutiere ich diese Frage entlang STAEMMLERs eigenen Ideen über zwei Themen: Pluralität und Sprache. Das Verhältnis von Geschehen und Struktur ist demnach über die sprachliche Form in der Zeit, über die Zeit, zu denken. Angeredetwerden von einem "Du", das immer auch das allgemeine "Man" (oder "Wir" stellvertritt, verleiht dem "Ich" als dialogischem Selbst Stabilität in der Vielfalt. Der Schritt zur Öffnung der Intersubjektivität ins Öffentliche wird damit als notwendiges Moment zur Überwindung des Individualismus angesehen. URN: http://nbn-resolving.de/urn:nbn:de:0114-fqs1503298

Stakeholder Value Matrix - Die VErbindung zwischen Shareholder Value und Stakeholder Value

OpenAIRE

Frank Figge

2004-01-01

Die Studie zeigt, was unter Stakeholder Value verstanden werden kann, wie Shareholder Value und Stakeholder Value gemessen werden können und welche Verbindung zwischen beiden Konzepten besteht. In dieser Studie wird erstmals die Wertbeitragsanalyse von Stakeholderbeziehungen vorgestellt. Anhand der Stakeholder Value Matrix lässt sich zeigen, welche Stakeholdergruppen zusammen positiv zum Unternehmenswert beitragen.

Coastal Digital Elevation Models (DEMs)

Data.gov (United States)

National Oceanic and Atmospheric Administration, Department of Commerce — Digital elevation models (DEMs) of U.S. and other coasts that typically integrate ocean bathymetry and land topography. The DEMs support NOAA's mission to understand...

Bestimmung der optimalen Array-Apertur für die Ultraschallprüfung von faserverstärkten Kunststoffen

OpenAIRE

Kurras, Martin

2017-01-01

Für die zerstörungsfreie Prüfung von Kohlenstofffaserverbundwerkstoffen (CFK) wird häufig die Ultraschallprüfung verwendet. Neben dem klassischen Ultraschallverfahren findet dabei auch die Phased Array Technologie Anwendung. Hierbei wird zwischen zwei Verfahren unterschieden: dem handelsüblichen Phased Array oder Conventional Phased Array (CPA) und dem tomographischen Sampling Phased Array (SPA). Der Einsatz von Phased Arrays im Zusammenhang mit Linear-Scan-Technik und das sich daraus ergeben...

Die Verbannung von Verwaltungsverträgen aus dem Recht: Kooperationen zwischen Staat und Privaten in der deutschen Rechtswissenschaft des 18. Jahrhunderts / Banishing Administrative Contracts from Law: Cooperation between the State and Private Persons in the German Law of the 18th Century

Directory of Open Access Journals (Sweden)

Andreas Abegg

2012-03-01

Full Text Available Die deutsche rechtswissenschaftliche Literatur des 18. Jahrhunderts und des frühen 19. Jahrhunderts zur Kooperation zwischen Staat und Privaten befasst sich fast ausschliesslich mit der Rechtsform des Staatsdienstes. Dabei ist zu beobachten, wie der Vertrag zwischen Staat und Privaten im Allgemeinen und der Vertrag mit Staatsdienern im Speziellen mit der sich vertiefenden und für den kontinentalen Raum so typischen Trennung von öffentlich und privat respektive öffentlichem Recht und Privatrecht zwischen Stuhl und Bank geriet, d. h. weder im einen noch im anderen sich ausdifferenzierenden Rechtsbereich Aufnahme fand. Für Deutschland lässt sich dies anhand der Evolution der Staatsund Rechtstheorien nachvollziehen – insbesondere von Justi über Gönner zu Hegel und zahlreichen anderen Rechtswissenschaftlern des 19. Jahrhunderts. German legal literature on cooperation between the state and private persons in the 18th and early 19th centuries dealt almost exclusively with the legal form of government service. It is possible to observe that contractual agreements between the state and private persons in general and contractual agreements with civil servants in particular were accepted into neither of the self‐differentiating realms of public and private law, as both categories of law, like the public and private spheres themselves, typically demonstrated a deep separation in continental Europe. This can be seen in Germany through the evolution of state and legal theories, particularly in the works of Justi, then Gönner, through to Hegel and numerous other legal theorists of the 19th century.

Small catchments DEM creation using Unmanned Aerial Vehicles

Science.gov (United States)

Gafurov, A. M.

2018-01-01

Digital elevation models (DEM) are an important source of information on the terrain, allowing researchers to evaluate various exogenous processes. The higher the accuracy of DEM the better the level of the work possible. An important source of data for the construction of DEMs are point clouds obtained with terrestrial laser scanning (TLS) and unmanned aerial vehicles (UAV). In this paper, we present the results of constructing a DEM on small catchments using UAVs. Estimation of the UAV DEM showed comparable accuracy with the TLS if real time kinematic Global Positioning System (RTK-GPS) ground control points (GCPs) and check points (CPs) were used. In this case, the main source of errors in the construction of DEMs are the errors in the referencing of survey results.

[Mari Laanemets. Zwischen westlicher Moderne und sowjetischer Avantgarde. Inofizielle Kunst in Estland 1969-1978] / Mara Traumane

Index Scriptorium Estoniae

Traumane, Mara

2013-01-01

Arvustus: Laanemets, Mari. Zwischen westlicher Moderne und sowjetischer Avantgarde. Inofizielle Kunst in Estland 1969-1978. (Humboldt-Schriften zur Kunst- und Bildgeschichte, Bd. 14.9 Berlin: Gebr. Mann 2011

Review: Helga Kotthoff (Hrsg.) (2002). Kultur(en) im Gespräch

OpenAIRE

Otten, Matthias

2003-01-01

Viele theoretische und empirische Untersuchungen zur interkulturellen Kommunikation entstehen in Deutschland häufig an den disziplinären Grenzflächen zwischen Sprachwissenschaften, Soziologie, Ethnologie, Pädagogik oder Psychologie. Hier lässt sich auch der interdisziplinäre Band "Kultur(en) im Gespräch" verorten, in dem anhand exemplarsicher Gesprächsanalysen in und zwischen Kulturen theoretische Konzepte und methodische Zugänge aus der Soziolinguistik und der linguistischen Anthropologie vo...

Zoophilie in Zoologie und Roman: Sex und Liebe zwischen Mensch und Tier bei Plutarch, Plinius dem Älteren, Aelian und Apuleius

Directory of Open Access Journals (Sweden)

Judith Hindermann

2011-09-01

Full Text Available Die Bedeutung von Zoophilie in der antiken Literatur wurde bislang – mit Ausnahme des Mythos – kaum untersucht. Überblickt man die überlieferten literarischen Texte, fällt auf, dass Zoophilie ausserhalb des Mythos vor allem in zwei literarischen Gattungen auftritt : Einerseits in den zoologischen Schriften von Plutarch, Plinius dem Älteren und Aelian, andererseits im antiken Roman, d.h. in den Metamorphosen des Apuleius und im pseudo-lukianischen Onos. In diesem Beitrag soll untersucht werden, welche Funktion Zoophilie in den beiden literarischen Gattungen hat und wie die Autoren die sexuelle Praktik bewerten, die weder nach griechischem noch römischen Recht strafbar war. Da Vorstellungen über Tiere eng mit Gender und Geschlechterhierarchien verbunden sind, soll insbesondere die Frage berücksichtigt werden, inwiefern männliche und weibliche Verhaltens- und Rollenzuschreibungen bei der Darstellung zoophiler Akte wirksam werden.

Digitial Elevation Model (DEM) 100K

Data.gov (United States)

Kansas Data Access and Support Center — Digital Elevation Model (DEM) is the terminology adopted by the USG to describe terrain elevation data sets in a digital raster form. The standard DEM consists of a...

Digtial Elevation Model (DEM) 250K

Data.gov (United States)

Kansas Data Access and Support Center — Digital Elevation Model (DEM) is the terminology adopted by the USGS to describe terrain elevation data sets in a digital raster form. The standard DEM consists of a...

Digital Elevation Model (DEM) 24K

Data.gov (United States)

Kansas Data Access and Support Center — Digital Elevation Model (DEM) is the terminology adopted by the USGS to describe terrain elevation data sets in a digital raster form. The standard DEM consists of a...

Die Lebenssituation Alleinerziehender und sozialpolitische Maßnahmen für Alleinerziehende im Ländervergleich : Analyse von Berichten der öffentlichen Hand auf Ebene der Bundesländer sowie ausgewählter Kommunen

OpenAIRE

Limmer, Ruth

1998-01-01

Die vorliegende Expertise wurde im Rahmen eines Forschungsprojekts durchgeführt, das sich mit dem Vergleich zwischen Alleinerziehenden und Elternfamilien befaßte. Ziel der Arbeit ist es, einen Überblick über alle Berichte und Kurzinformationen zu geben, die zwischen 1987 und 1997 von seiten der öffentlichen Hand auf Ebene der Bundesländer zur Lebenssituation Alleinerziehender erstellt wurden. Ferner erfolgt ein Überblick über sozialpolitische Maßnahmen zur Förderung Alleinerziehender auf Länd...

Synthesis and applications of multifunctional hybrid materials based on microgel particles

OpenAIRE

Jia, He

2016-01-01

Die Kombination aus anorganischen Nanopartikeln und Mikrogelen in einem hybriden System erlaubt die Herstellung von Materialien mit vielseitigen neuen Eigenschaften. Im Idealfall weisen solche hybriden Materialien neben den Eigenschaften von beiden indivduellen Systemen zusätzlich synergetische Effekte auf, welche aus den Interaktionen zwischen dem anorganischen Nanopartikel und dem Mikrogel resultieren. Im ersten Teil dieser Arbeit wird eine neuartige und eingängige Methode zur Herstellung ...

Estimating Coastal Digital Elevation Model (DEM) Uncertainty

Science.gov (United States)

Amante, C.; Mesick, S.

2017-12-01

Integrated bathymetric-topographic digital elevation models (DEMs) are representations of the Earth's solid surface and are fundamental to the modeling of coastal processes, including tsunami, storm surge, and sea-level rise inundation. Deviations in elevation values from the actual seabed or land surface constitute errors in DEMs, which originate from numerous sources, including: (i) the source elevation measurements (e.g., multibeam sonar, lidar), (ii) the interpolative gridding technique (e.g., spline, kriging) used to estimate elevations in areas unconstrained by source measurements, and (iii) the datum transformation used to convert bathymetric and topographic data to common vertical reference systems. The magnitude and spatial distribution of the errors from these sources are typically unknown, and the lack of knowledge regarding these errors represents the vertical uncertainty in the DEM. The National Oceanic and Atmospheric Administration (NOAA) National Centers for Environmental Information (NCEI) has developed DEMs for more than 200 coastal communities. This study presents a methodology developed at NOAA NCEI to derive accompanying uncertainty surfaces that estimate DEM errors at the individual cell-level. The development of high-resolution (1/9th arc-second), integrated bathymetric-topographic DEMs along the southwest coast of Florida serves as the case study for deriving uncertainty surfaces. The estimated uncertainty can then be propagated into the modeling of coastal processes that utilize DEMs. Incorporating the uncertainty produces more reliable modeling results, and in turn, better-informed coastal management decisions.

Radar and Lidar Radar DEM

Science.gov (United States)

Liskovich, Diana; Simard, Marc

2011-01-01

Using radar and lidar data, the aim is to improve 3D rendering of terrain, including digital elevation models (DEM) and estimates of vegetation height and biomass in a variety of forest types and terrains. The 3D mapping of vegetation structure and the analysis are useful to determine the role of forest in climate change (carbon cycle), in providing habitat and as a provider of socio-economic services. This in turn will lead to potential for development of more effective land-use management. The first part of the project was to characterize the Shuttle Radar Topography Mission DEM error with respect to ICESat/GLAS point estimates of elevation. We investigated potential trends with latitude, canopy height, signal to noise ratio (SNR), number of LiDAR waveform peaks, and maximum peak width. Scatter plots were produced for each variable and were fitted with 1st and 2nd degree polynomials. Higher order trends were visually inspected through filtering with a mean and median filter. We also assessed trends in the DEM error variance. Finally, a map showing how DEM error was geographically distributed globally was created.

Schreiben auf Deutsch in Japan : Abstufung zwischen akademisch und wissenschaftlich

OpenAIRE

Schmidt, Maria Gabriela

2013-01-01

In dem Beitrag wird zunächst eine Unterscheidung von akademischem und wissenschaftlichem Schreiben aus didaktischen Gründen vorgeschlagen. Für den Fremdsprachenunterricht Deutsch als Fremdsprache in Japan ist darüberhinaus der Einfluss eigenkultureller Textmusterkonvention zu beachten. „Akademisches Schreiben“ lehnt sich an die englische Bezeichnung „academic writing“ an. In der deutschsprachigen Literatur findet sich häufig „wissenschaftliches Schreiben“, mit dem man ein hohes sprachliches N...

THE GLOBAL TANDEM-X DEM: PRODUCTION STATUS AND FIRST VALIDATION RESULTS

Directory of Open Access Journals (Sweden)

M. Huber

2012-07-01

Full Text Available The TanDEM-X mission will derive a global digital elevation model (DEM with satellite SAR interferometry. Two radar satellites (TerraSAR-X and TanDEM-X will map the Earth in a resolution and accuracy with an absolute height error of 10m and a relative height error of 2m for 90% of the data. In order to fulfill the height requirements in general two global coverages are acquired and processed. Besides the final TanDEM-X DEM, an intermediate DEM with reduced accuracy is produced after the first coverage is completed. The last step in the whole workflow for generating the TanDEM-X DEM is the calibration of remaining systematic height errors and the merge of single acquisitions to 1°x1° DEM tiles. In this paper the current status of generating the intermediate DEM and first validation results based on GPS tracks, laser scanning DEMs, SRTM data and ICESat points are shown for different test sites.

Preparation of MMC structures consisting of carbonfibre/aluminium prepregs by using the high velocity flame spraying; Herstellen von Halbzeugen aus kohlenstoffaserverstaerkten Aluminiumprepregs mit dem Hochgeschwindigkeitsflammspritzen

Energy Technology Data Exchange (ETDEWEB)

Wielage, B.; Rahm, J. [Lehrstuhl fuer Verbundwerkstoffe, TU Chemnitz-Zwickau, Chemnitz (Germany)

1994-12-01

The application of the thermal spraying process is a new way to produce carbon fibre reinforced Al-Matrix composites. Spreaded fibre rovings are enveloped in the matrix material with high velocity flame spraying. The advantage of the thermal spraying process is based in the low times for contacting between carbon fibres and liquid matrix material. Chemical reactions on the interface fibre/matrix, which are caused the decreasing of the fibre tensile strange, can be excluded. The thermal sprayed prepregs are compressed to MMC by hot pressing process. This longfibre reinforced composites are used to increase for instance casted components of motors. The aim of this research is the estimation of possibility to applicate the high velocity flame process for prepreg manufacturing. (orig.) [Deutsch] Die Anwendung des thermischen Spritzens zur Herstellung C/langfaserverstaerkter Al-Matrix Verbundwerkstoffe mittels Prepregtechnik beschreitet einen neuartigen Verfahrensweg. Zu Fasergelegen aufgespreizte Rovings werden durch Flamm- oder Hochgeschwindigkeitsflammspritzen mit dem Matrixmetall eingehuellt. Der Vorteil des thermischen Spritzens liegt in den geringen Kontaktzeiten der C-Fasern mit dem schmelzfluessigen Matrixmetall. Chemische Reaktionen zwischen Fasern und der Matrix, die zur Karbidbildung und Reduzierung der Verbundfestigkeit fuehren, koennen auch beim Verwenden von C-Fasern ohne Barriereschicht weitgehend ausgeschlossen werden. Die so hergestellten Prepregs koennen z.B. durch Heisspressen zu MMC kompaktiert werden, und als Halbzeuge (Inserts) Gussbauteile in hochbelasteten Bereichen partiell verstaerken. Die im Rahmen der Veroeffentlichung dargestellten Untersuchungen haben die kritische Beurteilung der Ergebnisse des HVOF-Spritzverfahrens zur Herstellung von C/Faser/Aluminiumprepregs zum Ziel. (orig.)

InGeo-IC: Metadateninformationssystem für Geodaten im WWW: Vortrag gehalten auf den 2. IuK-Tagen Mecklenburg-Vorpommern 1999, Rostock

OpenAIRE

Jasnoch, U.; Göbel, S.; Balfanz, D.

1999-01-01

Das InGeoForum versteht sich als Informations- und Kooperationsforum zwischen Geodatenanbietern und Geodatennutzern. Das grundlegende Ziel des InGeoForum besteht darin, basierend auf dem derzeitigen Geodatenmarkt, den Aufbau einer "Nationalen Infrastruktur für Geodaten" zu forcieren. Als zentrale Dienstleistung bietet das InGeoForum ein sogenanntes Information Center (InGeo-IC) an, in dem einerseits Datenanbieter ihr Datensortiment vermarkten können, andererseits Anwender (z.B. GIS - Dienstle...

kawaihae_dem.grd

Data.gov (United States)

National Oceanic and Atmospheric Administration, Department of Commerce — NGDC builds and distributes high-resolution, coastal digital elevation models (DEMs) that integrate ocean bathymetry and land topography to support NOAA's mission to...

Begegnungen mit fremden Sprachen

DEFF Research Database (Denmark)

Daryai-Hansen, Petra Gilliyard

Was ist Sprachideologie? Was sind fremde Sprachen? Über welche Sprachen sprechen wir, und wie? Dieses Buch, das sich unter dem theoretisch-methodischen Horizont der komparativen kritischen Diskursanalyse in einem Feld zwischen Soziolinguistik und Bourdieus sprachsoziologischen Arbeiten verortet, ...

The Importance of Precise Digital Elevation Models (DEM) in Modelling Floods

Science.gov (United States)

Demir, Gokben; Akyurek, Zuhal

2016-04-01

Digital elevation Models (DEM) are important inputs for topography for the accurate modelling of floodplain hydrodynamics. Floodplains have a key role as natural retarding pools which attenuate flood waves and suppress flood peaks. GPS, LIDAR and bathymetric surveys are well known surveying methods to acquire topographic data. It is not only time consuming and expensive to obtain topographic data through surveying but also sometimes impossible for remote areas. In this study it is aimed to present the importance of accurate modelling of topography for flood modelling. The flood modelling for Samsun-Terme in Blacksea region of Turkey is done. One of the DEM is obtained from the point observations retrieved from 1/5000 scaled orthophotos and 1/1000 scaled point elevation data from field surveys at x-sections. The river banks are corrected by using the orthophotos and elevation values. This DEM is named as scaled DEM. The other DEM is obtained from bathymetric surveys. 296 538 number of points and the left/right bank slopes were used to construct the DEM having 1 m spatial resolution and this DEM is named as base DEM. Two DEMs were compared by using 27 x-sections. The maximum difference at thalweg of the river bed is 2m and the minimum difference is 20 cm between two DEMs. The channel conveyance capacity in base DEM is larger than the one in scaled DEM and floodplain is modelled in detail in base DEM. MIKE21 with flexible grid is used in 2- dimensional shallow water flow modelling. The model by using two DEMs were calibrated for a flood event (July 9, 2012). The roughness is considered as the calibration parameter. From comparison of input hydrograph at the upstream of the river and output hydrograph at the downstream of the river, the attenuation is obtained as 91% and 84% for the base DEM and scaled DEM, respectively. The time lag in hydrographs does not show any difference for two DEMs and it is obtained as 3 hours. Maximum flood extents differ for the two DEMs

Intertextuelle und intramediale Bezüge als Orientierungsangebot – systematische Überlegungen und exemplarische Untersuchungen zu Verweisen auf das Fernsehangebot

Directory of Open Access Journals (Sweden)

Ben Bachmair

2017-07-01

Full Text Available Auch wenn das Internet sich weder so schnell noch so nachhaltig im Alltag und als Bestandteil von Massenkommunikation etablierte, wie es Ende der neunziger Jahre den Anschein hatte, so zeigt sich am Internet doch, was sich mit der Vernetzungs- und Verfügbarkeitslogik verändern könnte, die dem Internet zu eigen ist. Manuel Castells (2001 mit seiner Analyse des „Informationszeitalters“ und der als instrumentellem Netzwerk organisierten Gesellschaft skizziert die Umrisse, wie sich unsere Gesellschaft mit welcher Dynamik entwickelt. Er spricht von einer „informationeilen Entwicklungsweise“ (ebd., S. 17, die anders als die „agrarische“ oder die „industrielle“ auf das gesellschaftliche Verhältnis der Menschen zur Natur („Produktion“, zu sich selber („Erfahrung“, „kulturelle Identität“ und zu anderen (.Macht“ einwirkt. Einen Aspekt dieser „informationellen Entwicklungsweise“ beschreibt Castells mit dem Hinweis auf „globale Netzwerke der Instrumentalität“, die eine „unüberschaubare Anzahl virtueller Gemeinschaften“ hervorbringt (ebd., S. 23. Dabei konstituiert sich auch eine Art von Subjektivität, die sich im Moment als „zunehmende Distanz zwischen Globalisierung und Identität, zwischen dem Netz und dem Ich“ beschreiben lässt (ebd., S. 24. In dieser Spannung bekommt .Multimedia“ die Funktion einer „symbolischen Umwelt“ (ebd., S. 415.

Research on the method of extracting DEM based on GBInSAR

Science.gov (United States)

Yue, Jianping; Yue, Shun; Qiu, Zhiwei; Wang, Xueqin; Guo, Leping

2016-05-01

Precise topographical information has a very important role in geology, hydrology, natural resources survey and deformation monitoring. The extracting DEM technology based on synthetic aperture radar interferometry (InSAR) obtains the three-dimensional elevation of the target area through the phase information of the radar image data. The technology has large-scale, high-precision, all-weather features. By changing track in the location of the ground radar system up and down, it can form spatial baseline. Then we can achieve the DEM of the target area by acquiring image data from different angles. Three-dimensional laser scanning technology can quickly, efficiently and accurately obtain DEM of target area, which can verify the accuracy of DEM extracted by GBInSAR. But research on GBInSAR in extracting DEM of the target area is a little. For lack of theory and lower accuracy problems in extracting DEM based on GBInSAR now, this article conducted research and analysis on its principle deeply. The article extracted the DEM of the target area, combined with GBInSAR data. Then it compared the DEM obtained by GBInSAR with the DEM obtained by three-dimensional laser scan data and made statistical analysis and normal distribution test. The results showed the DEM obtained by GBInSAR was broadly consistent with the DEM obtained by three-dimensional laser scanning. And its accuracy is high. The difference of both DEM approximately obeys normal distribution. It indicated that extracting the DEM of target area based on GBInSAR is feasible and provided the foundation for the promotion and application of GBInSAR.

Hydroaggregat

Science.gov (United States)

Heinen, Frank; Eberspächer, Peter

Das Hydroaggregat/Modulator bildet die hydraulische Verbindung zwischen dem Hauptzylinder und den Radzylindern und ist damit zentrales Bauelement elektronischer Bremssysteme. Es setzt die Stellbefehle des Steuergeräts um und regelt mittels Magnetventilen die Drücke in den Radbremsen.

Potential of Multi-Winglet Systems to Improve Aircraft Performance

OpenAIRE

Berens, Martin

2008-01-01

Gegenstand der vorliegenden Arbeit ist die Untersuchung des Potenzials von Multi-Winglet Konfigurationen zur Leistungssteigerung von Flugzeugen. Multi-Winglet Systeme sind aus der Vogelwelt bekannt. Die offensichtliche Diskrepanz zwischen dem Erfolg der Multi-Winglet Konfiguration in der Natur sowie dem theoretisch großen Potenzial zur Verringerung des induzierten Widerstands und der damit verbundenen Abschwächung der Intensität der Nachlaufwirbel auf der einen und den gleichzeitig mäßigen Er...

Fair Value Bewertung von zedierten Reserven

OpenAIRE

Heep-Altiner, Maria; Hoos, Sebastian; Krahforst, Christoph

2014-01-01

Für Schadenreserven existieren keine hinreichend fungiblen Märkte und somit auch keine Marktpreise im klassischen Sinn. Für eine Fair Value Bewertung bedarf es also eines geeigneten Modellansatzes. In der Schadenversicherung wird üblicher- weise der Transaktionswert modelliert, wobei hier die korrekte Modellierung der Kapitalkosten einer der zentralen Punkte ist. Der Fair Value der zedierten Reserven kann als Differenz zwischen dem Fair Value der Bruttoreserven und dem Fair Value der Nettores...

Produktherkunft und Preis als Einflussfaktoren auf die Kaufentscheidung

OpenAIRE

Leitow, Detmar

2005-01-01

Vor dem Hintergrund gesättigter und informationsüberlasteter Märkte wird die Bedeutung der regionalen Herkunft von Lebensmitteln für das Konsumentenverhalten diskutiert. Obwohl diesem Produktattribut in wissenschaftlichen Befragungen eine marketingrelevante Bedeutung bescheinigt wird, spiegelt sich die geäußerte Präferenz und Mehrpreisbereitschaft aus Sicht des Einzelhandels häufig nicht im Kaufverhalten wider. Dies deutet auf eine Diskrepanz zwischen der Einstellung und dem Verhalten hin. Zi...

Rezension: Digitale Körperinnenwelten. Endoskopische 3D-Animationen zwischen Medien und Populärkultur. von Sven Stollfuß

Directory of Open Access Journals (Sweden)

Petra Missomelius

2015-09-01

Full Text Available Sven Stollfuß’ Studie über die digitale Darstellung körperlicher Innenwelten bewegt sich zwischen medienwissenschaftlicher Theoriebildung, Bildtheorie und Science and Technology Studies. Petra Missomelius hat rezensiert ...

Automated Quality Control for Ortholmages and DEMs

DEFF Research Database (Denmark)

Höhle, Joachim; Potucková, Marketa

2005-01-01

The checking of geometric accurancy of orthoimages and digital elevation models (DEMs) is discussed. As a reference, an existing orthoimage and a second orthoimage derived from an overlapping aerial image, are used. The proposed automated procedures for checking the orthoimages and DEMs are based...

Estimating River Surface Elevation From ArcticDEM

Science.gov (United States)

Dai, Chunli; Durand, Michael; Howat, Ian M.; Altenau, Elizabeth H.; Pavelsky, Tamlin M.

2018-04-01

ArcticDEM is a collection of 2-m resolution, repeat digital surface models created from stereoscopic satellite imagery. To demonstrate the potential of ArcticDEM for measuring river stages and discharges, we estimate river surface heights along a reach of Tanana River near Fairbanks, Alaska, by the precise detection of river shorelines and mapping of shorelines to land surface elevation. The river height profiles over a 15-km reach agree with in situ measurements to a standard deviation less than 30 cm. The time series of ArcticDEM-derived river heights agree with the U.S. Geological Survey gage measurements with a standard deviation of 32 cm. Using the rating curve for that gage, we obtain discharges with a validation accuracy (root-mean-square error) of 234 m3/s (23% of the mean discharge). Our results demonstrate that ArcticDEM can accurately measure spatial and temporal variations of river surfaces, providing a new and powerful data set for hydrologic analysis.

Geschlecht zwischen Körper und Konstruktion: Aktuelle Impulse zu einer langen Debatte Between Bodies and Constructions: Current Takes on a Long-Standing Debate

Directory of Open Access Journals (Sweden)

Natascha Gruber

2002-11-01

Full Text Available Die mit dem Erscheinen von Judith Butlers Unbehagen der Geschlechter ausgelöste „Essentialismus versus Konstruktivismus“-Debatte um die Frage, wie Materialität und Körper zu denken sei, hält die Geschlechterforschung bis heute in dilemmatischer Spannung. Kann auf die Kategorie Geschlecht überhaupt verzichtet werden? Der Sammelband Verhandlungen des Geschlechts dokumentiert anhand von 15 Beiträgen aus den Bereichen Kulturwissenschaften, Philosophie, Psychoanalyse und Politik die aktuelle Entwicklung der Debatte rund um den an Butler orientierten feministischen Konstruktionsbegriff. Unter Rückgriff auf unterschiedliche Ansätze wird versucht, zwischen „Körper“ und „Diskurs“ zu vermitteln und Materialität neu zu denken.The “essentialism-versus-constructivism” debate which was sparked by Butler’s work, Gender Trouble, a debate centered around the question how to best think about materiality and bodies, continues to be relevant to gender studies to the present day. Is it at all possible to avoid gender as a category? 15 essays from scholars in cultural studies, philosophy, psycho-analysis, and politics document the current development of the debates that were inspired by Butler’s ideas about feminist constructions. Using a variety of different approaches, the authors attempt to mediate between the concepts of “body” and “discourse” and to conceive of materiality in a new way.

Riots - Zur Verortung eines unscharfen Phänomens

Directory of Open Access Journals (Sweden)

Janna Frenzel

2016-05-01

Full Text Available Bei riots handelt es sich um unscharfe Phänomene, die von urbanen Jugendaufständen bis zu gewaltvoll eskalierenden Demonstrationen reichen. Auch der Begriff riot ist trotz seiner teils regen Verwendung in Medien und Wissenschaft nach wie vor diffus und unscharf. Neben diesen konzeptionellen Leerstellen gibt es in den Sozialwissenschaften bisher kein klar umrissenes Forschungsfeld zu riots. Auch der Sozialen Bewegungsforschung gelingt es nicht, riots als Protestphänomene zu fassen. Vor dem Hintergrund dieser Lücken im Forschungsstand versucht sich der vorliegende Text an einer wissenschaftlichen Verortung von riot als Phänomen und als Begriff. Dabei werden zwei zentrale Aspekte der bisherigen sozialwissenschaftlichen Debatte zu riots untersucht: das Verhältnis zwischen riots und Gewalt sowie das Verhältnis zwischen riots und dem Politischen. Normal 0 21 false false false DE X-NONE X-NONE /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Normale Tabelle"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-parent:""; mso-padding-alt:0cm 5.4pt 0cm 5.4pt; mso-para-margin:0cm; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:10.0pt; font-family:"Times New Roman","serif";} Bei riots handelt es sich um unscharfe Phänomene, die von urbanen Jugendaufständen bis zu gewaltvoll eskalierenden Demonstrationen reichen. Auch der Begriff riot ist trotz seiner teils regen Verwendung in Medien und Wissenschaft nach wie vor diffus und unscharf. Neben diesen konzeptionellen Leerstellen gibt es in den Sozialwissenschaften bisher kein klar umrissenes Forschungsfeld zu riots. Auch der Sozialen Bewegungsforschung gelingt es nicht, riots als Protestphänomene zu fassen. Vor dem Hintergrund dieser Lücken im Forschungsstand versucht sich der vorliegende Text an einer wissenschaftlichen Verortung von riot als Phänomen und als Begriff. Dabei werden zwei zentrale Aspekte der

Algumas anedotas sobre Demóstenes: uma releitura

Directory of Open Access Journals (Sweden)

Maddalena Vallozza

2013-06-01

Full Text Available Muitas das anedotas sobre Demóstenes estão relacionados a seus problemas de voz e a suas dificuldades no momento da hypokrisis. Eu proponho uma reinterpretação das páginas em que eles nos são transmitidos: de Quintiliano (11, 3, a principal testemunha, a Cícero (Orator 26 e 56-58, Brutus 142, De Oratore I 261 e III 213, do autor da seção sobre Demóstenes nas Vidas dos Dez Oradores (844 d-845 b à Vida de Demóstene, de Plutarco. Com base nisso, particularmente graças a Plutarco, que cita Hermipo e Demétrio de Fáleros, é possível formular a hipótese de que a tradição nasceu no Perípato, na área de interesses pela hypokrisis que demonstram o perdido Perì hypokríseos de Teofrasto e os fragmentos da Retórica de Demétrio de Fáleros.

ASTER Orthorectified Digital Elevation Model (DEM) V003

Data.gov (United States)

National Aeronautics and Space Administration — The ASTER L3 DEM and Orthorectified Images form a multi-file product that contains both the Digital Elevation Model (DEM), and the Orthorectified Image products....

Charakterisierung der Interaktion zwischen dem Usher-Syndrom-Protein Harmonin und dem ARPKD-Zystennierenprotein Polyductin

OpenAIRE

Mager, Silke

2010-01-01

Cilia are hair-like structures that extend from the surface of epithelial cells. Human diseases referred to as ciliopathies arise from defects in cilia function. Autosomal recessive polycystic kidney disease (ARPKD), the most frequent cause of hereditary cystic kidney disease in infancy and childhood, and Usher syndrome, the most frequent hereditary cause for combined deaf-blindness, are two important ciliopathies. Senior-Løken syndrome as another ciliopathy affects both organs, the kidney an...

Römerzeitliche keramik aus dem nordöstlichen Turm der Römerstadt Horreum Margi

Directory of Open Access Journals (Sweden)

Petković Sofija

2011-01-01

Full Text Available Ćuprija, die ehemalige Römerstadt Horreum Margi, liegt im zentralen Teil Serbiens, an der Mündung des Flusses Ravanica in die Morava. Der Ort war ein Militärlager und spielte eine wichtige Rolle als Sammlungszentrum der Römerprovinz Moesia Superior (Moesia Prima. Zwischen 1986 und 1990 fanden die Ausgrabungen von Horreum Margi statt. Dabei wurden der Innenraum der spätrömischen Festung, die nördliche Mauer und der nordöstliche Turm erforscht. Während der Ausgrabung im Turm wurden unterschiedliche Keramiktypen entdeckt. Schüsseln (acht Typen bilden dabei die Mehrheit. Danach kommen Töpfe (sieben Typen, Amphoren (zwei Typen, Krüge (zwei Typen, Deckel (ein Typ und Becher (ein Typ. Sie gehören alle zu einer komplexen spätrömerzeitlichen Typologie, die für diese Fundstelle erstellt wurde und entsprechen zu den restlichen Keramiktypen, die im Festungsinneren und entlang der Nordmauer ausgegraben kamen. Der Text bietet einen Überblick aller Keramiktypen an, die im nordöstlichen Turm der Römerfestung Horreum Margi entdeckt wurden. [Projekat Ministarstva nauke Republike Srbije, br. 177007: Romanisierung, Urbanisierung und Transformation städtischer Zentren vomzivilen, militärischen und Wohnungscharakter in den römischen Provinzen auf dem Territorium Serbiens i br. 177007: Viminacium dierömische Stadt und Militärlager-Forschung der materiellen und geistigen Hinterlassenschaft mit der Verwendung moderner Technologien: Ferndetektion, Geophysik, Gis Digitalisierung und 3.D Visualisierung

Envolving the Operations of the TerraSAR-X/TanDEM-X Mission Planning System during the TanDEM-X Science Phase

OpenAIRE

Stathopoulos, Fotios; Guillermin, Guillaume; Garcia Acero, Carlos; Reich, Karin; Mrowka, Falk

2016-01-01

After the successful Global Coverage of the Digital Elevation Model, the TanDEM-X Science phase was initiated in September of 2014, dedicated to the demonstration of innovative techniques and experiments. The TanDEM-X Science phase had a large impact on the TerraSAR-X/TanDEM-X Mission Planning System. The two main challenges were the formation flying changes and the activation of a new acquisition mode, the so called Dual Receive Antenna (DRA) acquisition mode. This paper describes all action...

Privatsphäre, gibt’s da nicht 'ne App für? - Verbesserung von Privatsphäre-relevantem Verhalten durch bessere Informationen

OpenAIRE

Gerber, Paul

2017-01-01

Die vorliegende Arbeit beschäftigt sich mit dem digitalen Alltag von Endanwendern und den damit verbundenen Implikationen für die individuelle Privatsphäre. Der digitale Alltag beschreibt dabei den alltäglichen Umgang mit dem Smartphone beziehungsweise digitalen Diensten im Allgemeinen und die dafür häufig notwendige Preisgabe persönlicher Daten. In diesem Kontext wird auch das sogenannte Privatsphären Paradoxon thematisiert, welches den scheinbaren Widerspruch zwischen der Einstellung zu Pri...

Shareholder Kapitalismus und das Casino Spiel an den Börsen

OpenAIRE

Young, Brigitte; Hegelich, Simon

2003-01-01

'Das Konzept des Shareholder Value ist durch die jüngsten Entwicklungen im Unternehmenssektor, vor allem durch die Bilanz- und Betrugsskandale von TNC's und die damit verbundene Vernichtung von Arbeitsplätzen in die Kritik geraten. In den politischen Debatten über Shareholder Value wird ein Systemunterschied zwischen dem 'Stakeholder-Ansatz' (wie im rheinischen Kapitalismus) und dem mit der Liberalisierung der Finanzmärkte Ende der 70er Jahre in den USA entwickelten Begriff Shareholder Value ...

Bytes, Books and Readers

DEFF Research Database (Denmark)

Rasmussen, Krista Stinne Greve

2016-01-01

In diesem Beitrag werden Ergebnisse aus der Dissertation der Autorin Bytes, Books, and Readers. A Historical Analysis of the Transition from Printed to Digital Scholarly Editions Focusing on ‘The Writings of Søren Kierkegaard’ (2015) vorgestellt. Dabei wird dem Wechselverhältnis zwischen der...

The body within: on images and ruptures

NARCIS (Netherlands)

Alexandrova, A.; Mieszkowsky, S.; Vogt-William, C.

2008-01-01

Anhand dreier Installationen des belgischen Künstlers Lawrence Malstaf untersucht dieser Artikel zum einen wie Bilder und Körper sich gegenseitig irritieren, und zum anderen auf welche Weise die traditionelle Unterscheidung zwischen dem Körper und seiner visuellen Repräsentation in Frage gestellt

A comparative appraisal of hydrological behavior of SRTM DEM at catchment level

Science.gov (United States)

Sharma, Arabinda; Tiwari, K. N.

2014-11-01

The Shuttle Radar Topography Mission (SRTM) data has emerged as a global elevation data in the past one decade because of its free availability, homogeneity and consistent accuracy compared to other global elevation dataset. The present study explores the consistency in hydrological behavior of the SRTM digital elevation model (DEM) with reference to easily available regional 20 m contour interpolated DEM (TOPO DEM). Analysis ranging from simple vertical accuracy assessment to hydrological simulation of the studied Maithon catchment, using empirical USLE model and semidistributed, physical SWAT model, were carried out. Moreover, terrain analysis involving hydrological indices was performed for comparative assessment of the SRTM DEM with respect to TOPO DEM. Results reveal that the vertical accuracy of SRTM DEM (±27.58 m) in the region is less than the specified standard (±16 m). Statistical analysis of hydrological indices such as topographic wetness index (TWI), stream power index (SPI), slope length factor (SLF) and geometry number (GN) shows a significant differences in hydrological properties of the two studied DEMs. Estimation of soil erosion potentials of the catchment and conservation priorities of microwatersheds of the catchment using SRTM DEM and TOPO DEM produce considerably different results. Prediction of soil erosion potential using SRTM DEM is far higher than that obtained using TOPO DEM. Similarly, conservation priorities determined using the two DEMs are found to be agreed for only 34% of microwatersheds of the catchment. ArcSWAT simulation reveals that runoff predictions are less sensitive to selection of the two DEMs as compared to sediment yield prediction. The results obtained in the present study are vital to hydrological analysis as it helps understanding the hydrological behavior of the DEM without being influenced by the model structural as well as parameter uncertainty. It also reemphasized that SRTM DEM can be a valuable dataset for

Nagelbefall kann bei Patienten mit Psoriasis auf eine Enthesiopathie hinweisen.

Science.gov (United States)

Castellanos-González, Maria; Joven, Beatriz Esther; Sánchez, Julio; Andrés-Esteban, Eva María; Vanaclocha-Sebastián, Francisco; Romero, Pablo Ortiz; Díaz, Raquel Rivera

2016-11-01

Obwohl subklinische Enthesiopathie ein gut etabliertes diagnostisches Merkmal der Psoriasisarthritis (PsA) ist, wird sie häufig übersehen, da viele Patienten asymptomatisch sind. Gäbe es klinische Hinweise auf das Vorliegen einer Enthesiopathie, würde dies den Klinikern die Möglichkeit eröffnen, eine PsA frühzeitig zu diagnostizieren. Es wurde eine monozentrische prospektive Studie mit insgesamt 90 Psoriasis-Patienten durchgeführt, um mittels Ultraschall das Vorliegen von Enthesenanomalien zu untersuchen und eine Korrelation mit dem Befall der Nägel festzustellen. Enthesenanomalien wurden bei 23 Patienten (25,5 %) gefunden, von denen 19 (82,6 %) Nagelbefall aufwiesen. Bei 4 Patienten waren die Nägel nicht betroffen. Enthesiopathie lag bei 31,1 % (19/61) der Patienten mit Onychopathie vor, von den Patienten ohne Nagelbefall litten nur 13,8 % (4/29) an Enthesiopathie (p = 0,07). Zwischen dem Target-NAPSI-Score und dem Vorliegen einer Enthesiopathie bestand eine signifikante Korrelation. Eine signifikante Korrelation bestand darüber hinaus auch zwischen dem Vorliegen einer Enthesiopathie und der Anzahl der betroffenen Nägel (p = 0,035). Klinische Belege für eine Onychopathie können der Schlüssel für die frühe Diagnose einer Enthesiopathie bei Psoriasis-Patienten sein. © 2016 Deutsche Dermatologische Gesellschaft (DDG). Published by John Wiley & Sons Ltd.

S1-Leitlinie Lipödem.

Science.gov (United States)

Reich-Schupke, Stefanie; Schmeller, Wilfried; Brauer, Wolfgang Justus; Cornely, Manuel E; Faerber, Gabriele; Ludwig, Malte; Lulay, Gerd; Miller, Anya; Rapprich, Stefan; Richter, Dirk Frank; Schacht, Vivien; Schrader, Klaus; Stücker, Markus; Ure, Christian

2017-07-01

Die vorliegende überarbeitete Leitlinie zum Lipödem wurde unter der Federführung der Deutschen Gesellschaft für Phlebologie (DGP) erstellt und finanziert. Die Inhalte beruhen auf einer systematischen Literaturrecherche und dem Konsens von acht medizinischen Fachgesellschaften und Berufsverbänden. Die Leitlinie beinhaltet Empfehlungen zu Diagnostik und Therapie des Lipödems. Die Diagnose ist dabei auf der Basis von Anamnese und klinischem Befund zu stellen. Charakteristisch ist eine umschriebene, symmetrisch lokalisierte Vermehrung des Unterhautfettgewebes an den Extremitäten mit deutlicher Disproportion zum Stamm. Zusätzlich finden sich Ödeme, Hämatomneigung und eine gesteigerte Schmerzhaftigkeit der betroffenen Körperabschnitte. Weitere apparative Untersuchungen sind bisher besonderen Fragestellungen vorbehalten. Die Erkrankung ist chronisch progredient mit individuell unterschiedlichem und nicht vorhersehbarem Verlauf. Die Therapie besteht aus vier Säulen, die individuell kombiniert und an das aktuelle Beschwerdebild angepasst werden sollten: komplexe physikalische Entstauungstherapie (manuelle Lymphdrainage, Kompressionstherapie, Bewegungstherapie, Hautpflege), Liposuktion und plastisch-chirurgische Interventionen, Ernährung und körperliche Aktivität sowie ggf. additive Psychotherapie. Operative Maßnahmen sind insbesondere dann angezeigt, wenn trotz konsequent durchgeführter konservativer Therapie noch Beschwerden bestehen bzw. eine Progredienz des Befundes und/oder der Beschwerden auftritt. Eine begleitend zum Lipödem bestehende morbide Adipositas sollte vor einer Liposuktion therapeutisch angegangen werden. © 2017 The Authors | Journal compilation © Blackwell Verlag GmbH, Berlin.

Large Scale Landform Mapping Using Lidar DEM

Directory of Open Access Journals (Sweden)

Türkay Gökgöz

2015-08-01

Full Text Available In this study, LIDAR DEM data was used to obtain a primary landform map in accordance with a well-known methodology. This primary landform map was generalized using the Focal Statistics tool (Majority, considering the minimum area condition in cartographic generalization in order to obtain landform maps at 1:1000 and 1:5000 scales. Both the primary and the generalized landform maps were verified visually with hillshaded DEM and an orthophoto. As a result, these maps provide satisfactory visuals of the landforms. In order to show the effect of generalization, the area of each landform in both the primary and the generalized maps was computed. Consequently, landform maps at large scales could be obtained with the proposed methodology, including generalization using LIDAR DEM.

Scattering of plane waves by rough surfaces in the sense of Born approximation

OpenAIRE

Arnold, Thomas

2014-01-01

Das Thema dieser Arbeit ist die Streuung elektromagnetischer ebener Wellen an rauen Oberflächen, also an ebenen Oberflächen mit glatten und beschränkten Störungen. Darüber hinaus wird ein kleiner Kontrast der Materialkonstanten zwischen dem Deckmaterial und dem Material unter der rauen Oberfläche angenommen. Unter diesen Voraussetzungen wird ein Fernfeld-Formel für das gestreute Feld mit Hilfe von Born-Approximation und Fourier-Techniken hergeleitet. Dieser Ansatz basiert auf einer Modifikati...

Influence of combustion air guidance on solid matter burnout and on pollutant emissions in grid incinerators; Einfluss der Verbrennungsluftfuehrung auf den Feststoffabbrand und auf das Schadstoffverhalten bei der Hausmuellverbrennung auf dem Rost

Energy Technology Data Exchange (ETDEWEB)

Hunsinger, H.; Seifert, H. [Forschungszentrum Karlsruhe GmbH Technik und Umwelt (Germany). Inst. fuer Technische Chemie

2003-07-01

The contribution investigates the influence of combustion air guidance strategies on process optimisation. In particular, it is investigated if efficient burnout correlates with low pollutant emissions and if the effects are similar or contrary for the different process goals. (orig.) [German] Der Einfluss von Brennstoffqualitaeten, der Ofengeometrie sowie von Feuerungsbetriebsparametern auf die Bildungsraten von Schadstoffen wie PCDD/F und NO{sub x} und auf die Transferraten von Schwermetallen, Chlor- und Schwefelverbindungen aus dem Brennstoffbett ins Rauchgas ist zur Zeit nur ungenuegend bekannt. Besonders die Frage, wie die primaere Forderung nach moeglichst vollstaendigem Ausbrand von Rauchgas und Rostasche mit weiteren Zielen wie niedrige Bildungsraten von Schadstoffen und Inertisierung der Rostasche korreliert, zeigt den Bedarf umfassender systematischer Untersuchungen auf. Im Rahmen dieses Beitrags soll als Beispiel fuer Modifikationen des Verbrennungsprozesses der Einfluss unterschiedlicher Verbrennungsluftfuehrungen auf die aufgefuehrten Optimierungsziele vorgestellt werden. Insbesondere soll der Frage nachgegangen werden, ob ein effizienter Ausbrand mit niedrigen Schadstoffbildungsraten korreliert und ob zwischen den Zielgroessen gleiche oder kontraere Wirkungen auftreten. (orig.)

The behaviour of concrete at high temperatures and triaxial stress - FE model based on the concrete structure; Betonverhalten bei hohen Temperaturen und triaxialer Beanspruchung - FE-Modell auf der Basis der Betonstruktur

Energy Technology Data Exchange (ETDEWEB)

Ameler, J.

1997-12-31

In this work, an analytical material model was developed, based on the finite element (FE) method, with which the material behaviour of a normal quartzite concrete under temperature stress can be described. Starting from natural fires, the short term area and temperatures between the normal temperature and about 800 C are of special interest. Altogether, it was found that important processes reducing the strength, which occur in high temperature stresses of concrete, can be directly traced back to the additive or the mortar phase, while others are due to the interaction between the two partners. In this attempted model, the compound material concrete is therefore regarded as a system consisting of two components, the additive and the mortar matrix. The mortar matrix is defined as the part consisting of the cement, the water and the fine proportion of the additive (diameter{<=}4 mm). (orig./MM) [Deutsch] In der vorliegenden Arbeit wurde ein analytisches Werkstoffmodell auf der Basis der FE-Methode entwickelt, mit dem das Werkstoffverhalten eines quarzitischen Normalbetons unter einer Temperaturbeanspruchung beschrieben werden kann. Ausgehend vom natuerlichen Brandgeschehen, interessieren besonders der Kurzzeitbereich und Temperaturen zwischen Normaltemperatur und ca. 800 C. In der Summe zeichnet sich ab, dass wesentliche festigkeitsmindernde Prozesse, die sich bei einer Hochtemperaturbeanspruchung von Beton abspielen, direkt dem Zuschlag bzw. der Moertelphase zugeordnet werden koennen, waehrend andere auf die Interaktion zwischen den beiden Partnern zurueckzufuehren sind. Im vorliegenden Modellansatz wird der Verbundwerkstoff Beton deshalb als ein aus zwei Komponenten bestehendes System betrachtet, dem Zuschlag und der Moertelmatrix. Die Moertelmatrix wird als der aus dem Zement, dem Wasser und dem Feinanteil des Zuschlags (Durchmesser{<=}4 mm) zusammengesetzte Teil definiert. (orig./MM)

Research on a dem Coregistration Method Based on the SAR Imaging Geometry

Science.gov (United States)

Niu, Y.; Zhao, C.; Zhang, J.; Wang, L.; Li, B.; Fan, L.

2018-04-01

Due to the systematic error, especially the horizontal deviation that exists in the multi-source, multi-temporal DEMs (Digital Elevation Models), a method for high precision coregistration is needed. This paper presents a new fast DEM coregistration method based on a given SAR (Synthetic Aperture Radar) imaging geometry to overcome the divergence and time-consuming problem of the conventional DEM coregistration method. First, intensity images are simulated for two DEMs under the given SAR imaging geometry. 2D (Two-dimensional) offsets are estimated in the frequency domain using the intensity cross-correlation operation in the FFT (Fast Fourier Transform) tool, which can greatly accelerate the calculation process. Next, the transformation function between two DEMs is achieved via the robust least-square fitting of 2D polynomial operation. Accordingly, two DEMs can be precisely coregistered. Last, two DEMs, i.e., one high-resolution LiDAR (Light Detection and Ranging) DEM and one low-resolution SRTM (Shutter Radar Topography Mission) DEM, covering the Yangjiao landslide region of Chongqing are taken as an example to test the new method. The results indicate that, in most cases, this new method can achieve not only a result as much as 80 times faster than the minimum elevation difference (Least Z-difference, LZD) DEM registration method, but also more accurate and more reliable results.

Der Zusammenhang zwischen sportlicher Aktivität und visuell-räumlichen Fähigkeiten

OpenAIRE

Pietsch, Stefanie

2012-01-01

Thema dieser Arbeit ist es, den Zusammenhang zwischen motorischen bzw. sportlichen Fähigkeiten und visuell-räumlichen Fähigkeiten zu untersuchen. Speziell wird die Bedeutung der konditionellen und koordinativen Fähigkeiten für die mentale Rotationsleistungsfähigkeit, einer klassischen Aufgabe zur Erfassung des visuell-räumlichen Vorstellungsvermögens, untersucht. Die Beteiligung motorischer Prozesse an der mentalen Rotation sowie die Tatsache, dass die Fähigkeit mental zu rotieren durch kogn...

Precise baseline determination for the TanDEM-X mission

Science.gov (United States)

Koenig, Rolf; Moon, Yongjin; Neumayer, Hans; Wermuth, Martin; Montenbruck, Oliver; Jäggi, Adrian

The TanDEM-X mission will strive for generating a global precise Digital Elevation Model (DEM) by way of bi-static SAR in a close formation of the TerraSAR-X satellite, already launched on June 15, 2007, and the TanDEM-X satellite to be launched in May 2010. Both satellites carry the Tracking, Occultation and Ranging (TOR) payload supplied by the GFZ German Research Centre for Geosciences. The TOR consists of a high-precision dual-frequency GPS receiver, called Integrated GPS Occultation Receiver (IGOR), and a Laser retro-reflector (LRR) for precise orbit determination (POD) and atmospheric sounding. The IGOR is of vital importance for the TanDEM-X mission objectives as the millimeter level determination of the baseline or distance between the two spacecrafts is needed to derive meter level accurate DEMs. Within the TanDEM-X ground segment GFZ is responsible for the operational provision of precise baselines. For this GFZ uses two software chains, first its Earth Parameter and Orbit System (EPOS) software and second the BERNESE software, for backup purposes and quality control. In a concerted effort also the German Aerospace Center (DLR) generates precise baselines independently with a dedicated Kalman filter approach realized in its FRNS software. By the example of GRACE the generation of baselines with millimeter accuracy from on-board GPS data can be validated directly by way of comparing them to the intersatellite K-band range measurements. The K-band ranges are accurate down to the micrometer-level and therefore may be considered as truth. Both TanDEM-X baseline providers are able to generate GRACE baselines with sub-millimeter accuracy. By merging the independent baselines by GFZ and DLR, the accuracy can even be increased. The K-band validation however covers solely the along-track component as the K-band data measure just the distance between the two GRACE satellites. In addition they inhibit an un-known bias which must be modelled in the comparison, so the

Hydraulic correction method (HCM) to enhance the efficiency of SRTM DEM in flood modeling

Science.gov (United States)

Chen, Huili; Liang, Qiuhua; Liu, Yong; Xie, Shuguang

2018-04-01

Digital Elevation Model (DEM) is one of the most important controlling factors determining the simulation accuracy of hydraulic models. However, the currently available global topographic data is confronted with limitations for application in 2-D hydraulic modeling, mainly due to the existence of vegetation bias, random errors and insufficient spatial resolution. A hydraulic correction method (HCM) for the SRTM DEM is proposed in this study to improve modeling accuracy. Firstly, we employ the global vegetation corrected DEM (i.e. Bare-Earth DEM), developed from the SRTM DEM to include both vegetation height and SRTM vegetation signal. Then, a newly released DEM, removing both vegetation bias and random errors (i.e. Multi-Error Removed DEM), is employed to overcome the limitation of height errors. Last, an approach to correct the Multi-Error Removed DEM is presented to account for the insufficiency of spatial resolution, ensuring flow connectivity of the river networks. The approach involves: (a) extracting river networks from the Multi-Error Removed DEM using an automated algorithm in ArcGIS; (b) correcting the location and layout of extracted streams with the aid of Google Earth platform and Remote Sensing imagery; and (c) removing the positive biases of the raised segment in the river networks based on bed slope to generate the hydraulically corrected DEM. The proposed HCM utilizes easily available data and tools to improve the flow connectivity of river networks without manual adjustment. To demonstrate the advantages of HCM, an extreme flood event in Huifa River Basin (China) is simulated on the original DEM, Bare-Earth DEM, Multi-Error removed DEM, and hydraulically corrected DEM using an integrated hydrologic-hydraulic model. A comparative analysis is subsequently performed to assess the simulation accuracy and performance of four different DEMs and favorable results have been obtained on the corrected DEM.

DSM-IV und DSM-5: Was hat sich tatsächlich verändert?

OpenAIRE

Ehret, Anna M.; Berking, Matthias

2013-01-01

Im Mai 2013 ist die fünfte Auflage des Diagnostischen und Statistischen Manuals Psychischer Störungen (DSM-5) der American Psychiatric Association erschienen. Um die Vor- und Nachteile des DSM-5 beurteilen und gegebenenfalls in Forschung und Praxis angemessen berücksichtigen zu können, sollten Wissenschaftler und Praktiker gleichermaßen über die Änderungen gegenüber dem DSM-IV informiert sein. In diesem Beitrag werden die wesentlichen Unterschiede zwischen dem DSM-IV und DSM-5 beschrieben. Ze...

Which DEM is best for analyzing fluvial landscape development in mountainous terrains?

Science.gov (United States)

Boulton, Sarah J.; Stokes, Martin

2018-06-01

Regional studies of fluvial landforms and long-term (Quaternary) landscape development in remote mountain landscapes routinely use satellite-derived DEM data sets. The SRTM and ASTER DEMs are the most commonly utilised because of their longer availability, free cost, and ease of access. However, rapid technological developments mean that newer and higher resolution DEM data sets such as ALOS World 3D (AW3D) and TanDEM-X are being released to the scientific community. Geomorphologists are thus faced with an increasingly problematic challenge of selecting an appropriate DEM for their landscape analyses. Here, we test the application of four medium resolution DEM products (30 m = SRTM, ASTER, AW3D; 12 m = TanDEM-X) for qualitative and quantitative analysis of a fluvial mountain landscape using the Dades River catchment (High Atlas Mountains, Morocco). This landscape comprises significant DEM remote sensing challenges, notably a high mountain relief, steep slopes, and a deeply incised high sinuosity drainage network with narrow canyon/gorge reaches. Our goal was to see which DEM produced the most representative best fit drainage network and meaningful quantification. To achieve this, we used ArcGIS and Stream Profiler platforms to generate catchment hillshade and slope rasters and to extract drainage network, channel long profile and channel slope, and area data. TanDEM-X produces the clearest landscape representation but with channel routing errors in localised high relief areas. Thirty-metre DEMs are smoother and less detailed, but the AW3D shows the closest fit to the real drainage network configuration. The TanDEM-X elevation values are the closest to field-derived GPS measurements. Long profiles exhibit similar shapes but with minor differences in length, elevation, and the degree of noise/smoothing, with AW3D producing the best representation. Slope-area plots display similarly positioned slope-break knickpoints with modest differences in steepness and concavity

Reval als Schnittstelle zwischen dem Gross- und dem Einzelhandel im Spätmittelalter / Carsten Jahnke

Index Scriptorium Estoniae

Jahnke, Carsten

2009-01-01

Vahenduskaubandusest kahe Tallinna kaupmehe, Hinrich Stalbroderi ja Hans Selhortsti näitel. Linna ja linna ümbritsenud maapiirkonna seotusest. Ilma regulaarsete vilja- ja linasaadetisteta oleks Tallinna suurkaupmeeste kaugkaubandus olnud mõeldamatu, samal ajal olid linnatagamaa mõisad kõigi Tallinna kaupmeeste olulised turustamispaigad.

Accuracy of Cartosat-1 DEM and its derived attribute at multiple ...

Indian Academy of Sciences (India)

and information content was compared using mean elevation, variance and entropy statistics. Various ... required, but for local studies large scale represen- tation is ... been made to examine the effect of DEM accuracy ... accuracy of DEM is evaluated with respect to grid .... that loss of entropy is a measure of DEM quality or.

Der Meteorologe : (aus dem Band "V". Tallinn 1998) / Elo Viiding ; aus dem Estnischen von Gisbert Jänicke

Index Scriptorium Estoniae

Viiding, Elo, 1974-

2002-01-01

Sisu : Die Möglichkeit des Meteorologen = Meteoroloogi võimalikkusest ; "Der Meteorologe kam 1990 in die Stadt..." = "Meteoroloog saabus linna aastal 1990..." ; "Was wäre dir "Arbeit" des Meteorologen..." = "Mis oleks meteoroloogi töö..." ; "Und ein Unglück für den Meteorologen ist es auch..." = "Ja Meteoroloogi õnnetus on veel see..." ; Angst vor dem Altwerden des Meteorologen = Hirm Meteoroloogi vanakssaamise ees ; Fest. Geschenk = Pidu. Kink ; "Wenn der Meteorologe eine Grösse sieht, ist er darüber..." = "Kui meteoroloog näeb suurust, on ta selle kohal..." ; Der Meteorologe wird im Saal erwartet = Meteoroloogi oodatakse saali ; "Das Abkommen mit der Meteorologenerwartung kündigen..." = "Katkestada leping meteoroloogiootusega..." ; "Die "Wege des Herrn" sind der Meteorologe..." = "Looja tee" on Meteoroloog..." ; Von dem Fremden, der im Saal den Meteorologen traf = Võõra lugu, kes Meteoroloogi saalis kohtas ; "Den Fremden hervorzuhusten, der von dem..." = "Köhida enesest välja võõras, kes tahtis teha..." ; Der Fremde beruhigt sich nicht = Võõras ei jää rahule

Cross Validation on the Equality of Uav-Based and Contour-Based Dems

Science.gov (United States)

Ma, R.; Xu, Z.; Wu, L.; Liu, S.

2018-04-01

Unmanned Aerial Vehicles (UAV) have been widely used for Digital Elevation Model (DEM) generation in geographic applications. This paper proposes a novel framework of generating DEM from UAV images. It starts with the generation of the point clouds by image matching, where the flight control data are used as reference for searching for the corresponding images, leading to a significant time saving. Besides, a set of ground control points (GCP) obtained from field surveying are used to transform the point clouds to the user's coordinate system. Following that, we use a multi-feature based supervised classification method for discriminating non-ground points from ground ones. In the end, we generate DEM by constructing triangular irregular networks and rasterization. The experiments are conducted in the east of Jilin province in China, which has been suffered from soil erosion for several years. The quality of UAV based DEM (UAV-DEM) is compared with that generated from contour interpolation (Contour-DEM). The comparison shows a higher resolution, as well as higher accuracy of UAV-DEMs, which contains more geographic information. In addition, the RMSE errors of the UAV-DEMs generated from point clouds with and without GCPs are ±0.5 m and ±20 m, respectively.

Der Ritter mit dem Hemd : drei Fassungen einer mittelalterlichen Erzählung

OpenAIRE

Dunphy, Graeme

2011-01-01

Unter den zahlreichen Motiven, die in der mittelalterlichen Literatur mit Frauendienst verbunden sind, gehört das vom Ritter mit dem Hemd zu den besonders interessanten. Es erscheint zunächst in dem ersten von fünf Fabliaux aus einer verlorenen Turiner Handschrift, die dem sonst unbekannten altfranzösischen Dichter Jacques de Baisieux zugeschrieben werden, einer heiteren Kurzgeschichte mit dem Titel "Des trois chevaliers et del chainse". In der vorliegenden Untersuchung gilt es, der Frage der...

Illustrations to “Gespräche in dem Reiche derer Todten zwischen dem vortreflichen Moscowitischen Czaar Petro Magno und dem grossen Tyrannen Ivan Basilowiz II” (Peter the Great and Ivan the Terrible by David Fassmann (1725

Directory of Open Access Journals (Sweden)

Ekaterina A. Skvortcova

2017-12-01

Full Text Available The journal created by David Fassmann (1683–1744, Gespräche in dem Reiche derer Todten, edited in Leipzig, was a huge success. Each of the 240 issues presents a dialogue between two historical figures from the afterworld. In the 83rd–86th Entrevuë, the interlocutors are Peter the Great and Ivan the Terrible. The texts of the four conversations were thoroughly examined by Eckhard Matthes (1987. The present paper explores how the illustrations to the 83rd–86th Entrevuë visualize the texts, which is significant as they were an important instrument for disseminating certain notions about Russia. While the illustration to the first dialogue of the suite juxtaposes Peter and Ivan, the illustration to the second one emphasizes the similarities between them. So the image of the “tyrant” and “barbarian” Ivan becomes a reference point with which a reader is urged to compare Peter’s deeds, seeing not only the differences but also the similarities. This greatly contributes to the creation of the multifaceted image of Russia of the early 18th century. The characters of the second illustration—a tiger and an executioner—can be identified as Ivan and Peter only if the reader takes into consideration an epigram to the illustration, the illustration to the previous dialogue, the text of the next Entrevuë, and facts about the execution of the strel’tsy known from other texts and images, about which Fassmann remains silent in the spirit of ars dissimulandi, which was typical for baroque culture. The paper offers an attempt to trace the iconography of the tyrant as a tiger. In the frontispiece to the 85th Entrevuë, a secretary bringing news from the world of the living and a portrait of Catherine I emphasize the connection of the past and the present, i.e., history and policy. Finally, the illustration to the last dialogue of the series returns to the glorification of Peter the Great declared in the first dialogue.

Uncertainty of soil erosion modelling using open source high resolution and aggregated DEMs

Directory of Open Access Journals (Sweden)

Arun Mondal

2017-05-01

Full Text Available Digital Elevation Model (DEM is one of the important parameters for soil erosion assessment. Notable uncertainties are observed in this study while using three high resolution open source DEMs. The Revised Universal Soil Loss Equation (RUSLE model has been applied to analysis the assessment of soil erosion uncertainty using open source DEMs (SRTM, ASTER and CARTOSAT and their increasing grid space (pixel size from the actual. The study area is a part of the Narmada river basin in Madhya Pradesh state, which is located in the central part of India and the area covered 20,558 km2. The actual resolution of DEMs is 30 m and their increasing grid spaces are taken as 90, 150, 210, 270 and 330 m for this study. Vertical accuracy of DEMs has been assessed using actual heights of the sample points that have been taken considering planimetric survey based map (toposheet. Elevations of DEMs are converted to the same vertical datum from WGS 84 to MSL (Mean Sea Level, before the accuracy assessment and modelling. Results indicate that the accuracy of the SRTM DEM with the RMSE of 13.31, 14.51, and 18.19 m in 30, 150 and 330 m resolution respectively, is better than the ASTER and the CARTOSAT DEMs. When the grid space of the DEMs increases, the accuracy of the elevation and calculated soil erosion decreases. This study presents a potential uncertainty introduced by open source high resolution DEMs in the accuracy of the soil erosion assessment models. The research provides an analysis of errors in selecting DEMs using the original and increased grid space for soil erosion modelling.

Dementia-free life expectancy (demFLE) in the Netherlands

NARCIS (Netherlands)

Perenboom, R.J.M.; Boshuizen, H.C.; Breteler, M.M.B.; Alewijn, O.; Water, H.P.A. van de

1996-01-01

To gain an insight into the burden of dementia in an aging society, life expectancy with dementia and its counterpart dementia-free life expectancy (DemFLE) in The Netherlands are presented. Sullivan's method was used to calculate DemFLE. For elderly living either independently or in homes for the

Digital Elevation Model (DEM), The county-wide DEM is published with a 20-foot grid size, though we have a more detailed DEM/DTM for some parts of the county, particularly the Green Bay Metro area, Published in 2000, 1:4800 (1in=400ft) scale, Brown County Government.

Data.gov (United States)

NSGIC Local Govt | GIS Inventory — Digital Elevation Model (DEM) dataset current as of 2000. The county-wide DEM is published with a 20-foot grid size, though we have a more detailed DEM/DTM for some...

Glacier Volume Change Estimation Using Time Series of Improved Aster Dems

Science.gov (United States)

Girod, Luc; Nuth, Christopher; Kääb, Andreas

2016-06-01

Volume change data is critical to the understanding of glacier response to climate change. The Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) system embarked on the Terra (EOS AM-1) satellite has been a unique source of systematic stereoscopic images covering the whole globe at 15m resolution and at a consistent quality for over 15 years. While satellite stereo sensors with significantly improved radiometric and spatial resolution are available to date, the potential of ASTER data lies in its long consistent time series that is unrivaled, though not fully exploited for change analysis due to lack of data accuracy and precision. Here, we developed an improved method for ASTER DEM generation and implemented it in the open source photogrammetric library and software suite MicMac. The method relies on the computation of a rational polynomial coefficients (RPC) model and the detection and correction of cross-track sensor jitter in order to compute DEMs. ASTER data are strongly affected by attitude jitter, mainly of approximately 4 km and 30 km wavelength, and improving the generation of ASTER DEMs requires removal of this effect. Our sensor modeling does not require ground control points and allows thus potentially for the automatic processing of large data volumes. As a proof of concept, we chose a set of glaciers with reference DEMs available to assess the quality of our measurements. We use time series of ASTER scenes from which we extracted DEMs with a ground sampling distance of 15m. Our method directly measures and accounts for the cross-track component of jitter so that the resulting DEMs are not contaminated by this process. Since the along-track component of jitter has the same direction as the stereo parallaxes, the two cannot be separated and the elevations extracted are thus contaminated by along-track jitter. Initial tests reveal no clear relation between the cross-track and along-track components so that the latter seems not to be

Novel application of DEM to modelling comminution processes

International Nuclear Information System (INIS)

Delaney, Gary W; Cleary, Paul W; Sinnott, Matt D; Morrison, Rob D

2010-01-01

Comminution processes in which grains are broken down into smaller and smaller sizes represent a critical component in many industries including mineral processing, cement production, food processing and pharmaceuticals. We present a novel DEM implementation capable of realistically modelling such comminution processes. This extends on a previous implementation of DEM particle breakage that utilized spherical particles. Our new extension uses super-quadric particles, where daughter fragments with realistic size and shape distributions are packed inside a bounding parent super-quadric. We demonstrate the flexibility of our approach in different particle breakage scenarios and examine the effect of the chosen minimum resolved particle size. This incorporation of the effect of particle shape in the breakage process allows for more realistic DEM simulations to be performed, that can provide additional fundamental insights into comminution processes and into the behaviour of individual pieces of industrial machinery.

Generation and performance assessment of the global TanDEM-X digital elevation model

Science.gov (United States)

Rizzoli, Paola; Martone, Michele; Gonzalez, Carolina; Wecklich, Christopher; Borla Tridon, Daniela; Bräutigam, Benjamin; Bachmann, Markus; Schulze, Daniel; Fritz, Thomas; Huber, Martin; Wessel, Birgit; Krieger, Gerhard; Zink, Manfred; Moreira, Alberto

2017-10-01

The primary objective of the TanDEM-X mission is the generation of a global, consistent, and high-resolution digital elevation model (DEM) with unprecedented global accuracy. The goal is achieved by exploiting the interferometric capabilities of the two twin SAR satellites TerraSAR-X and TanDEM-X, which fly in a close orbit formation, acting as an X-band single-pass interferometer. Between December 2010 and early 2015 all land surfaces have been acquired at least twice, difficult terrain up to seven or eight times. The acquisition strategy, data processing, and DEM calibration and mosaicking have been systematically monitored and optimized throughout the entire mission duration, in order to fulfill the specification. The processing of all data has finally been completed in September 2016 and this paper reports on the final performance of the TanDEM-X global DEM and presents the acquisition and processing strategy which allowed to obtain the final DEM quality. The results confirm the outstanding global accuracy of the delivered product, which can be now utilized for both scientific and commercial applications.

Boreal forest biomass classification with TanDEM-X

OpenAIRE

Torano Caicoya, Astor; Kugler, Florian; Papathanassiou, Kostas; Hajnsek, Irena

2013-01-01

High spatial resolution X-band interferometric SAR data from the TanDEM-X, in the operational DEM generation mode, are sensitive to forest structure and can therefore be used for thematic boreal forest classification of forest environments. The interferometric coherence in absence of temporal decorrelation depends strongly on forest height and structure. Due to the rather homogenous structure of boreal forest, forest biomass can be derived from forest height, on the basis of allometric equati...

Neues aus dem Forschungsfeld Deutsch als Zweitsprache. Sammelrezension

Directory of Open Access Journals (Sweden)

Claus Altmayer

2015-03-01

Full Text Available Neues aus dem Forschungsfeld Deutsch als Zweitsprache. Sammelrezension (Teil 2 von Bernt Ahrenholz (Hrsg. (2009, Empirische Befunde zu DaZ-Erwerb und Sprachförderung. Beiträge aus dem 3. ‚Workshop Kinder mit Migrationshintergrund‘; Karen Schramm & Christoph Schröder (Hrsg. (2009, Empirische Zugänge zu Spracherwerb und Sprachförderung in Deutsch als Zweitsprache; Stefan Jeuk (2010, Deutsch als Zweitsprache in der Schule. Grundlagen - Diagnose – Förderung

Modelling above Ground Biomass in Tanzanian Miombo Woodlands Using TanDEM-X WorldDEM and Field Data

Directory of Open Access Journals (Sweden)

Stefano Puliti

2017-09-01

Full Text Available The use of Interferometric Synthetic Aperture Radar (InSAR data has great potential for monitoring large scale forest above ground biomass (AGB in the tropics due to the increased ability to retrieve 3D information even under cloud cover. To date; results in tropical forests have been inconsistent and further knowledge on the accuracy of models linking AGB and InSAR height data is crucial for the development of large scale forest monitoring programs. This study provides an example of the use of TanDEM-X WorldDEM data to model AGB in Tanzanian woodlands. The primary objective was to assess the accuracy of a model linking AGB with InSAR height from WorldDEM after the subtraction of ground heights. The secondary objective was to assess the possibility of obtaining InSAR height for field plots when the terrain heights were derived from global navigation satellite systems (GNSS; i.e., as an alternative to using airborne laser scanning (ALS. The results revealed that the AGB model using InSAR height had a predictive accuracy of R M S E = 24.1 t·ha−1; or 38.8% of the mean AGB when terrain heights were derived from ALS. The results were similar when using terrain heights from GNSS. The accuracy of the predicted AGB was improved when compared to a previous study using TanDEM-X for a sub-area of the area of interest and was of similar magnitude to what was achieved in the same sub-area using ALS data. Overall; this study sheds new light on the opportunities that arise from the use of InSAR data for large scale AGB modelling in tropical woodlands.

ArcticDEM Year 3; Improving Coverage, Repetition and Resolution

Science.gov (United States)

Morin, P. J.; Porter, C. C.; Cloutier, M.; Howat, I.; Noh, M. J.; Willis, M. J.; Candela, S. G.; Bauer, G.; Kramer, W.; Bates, B.; Williamson, C.

2017-12-01

Surface topography is among the most fundamental data sets for geosciences, essential for disciplines ranging from glaciology to geodynamics. The ArcticDEM project is using sub-meter, commercial imagery licensed by the National Geospatial-Intelligence Agency, petascale computing, and open source photogrammetry software to produce a time-tagged 2m posting elevation model and a 5m posting mosaic of the entire Arctic region. As ArcticDEM enters its third year, the region has gone from having some of the sparsest and poorest elevation data to some of the most precise and complete data of any region on the globe. To date, we have produced and released over 80,000,000 km2 as 57,000 - 2m posting, time-stamped DEMs. The Arctic, on average, is covered four times though there are hotspots with more than 100 DEMs. In addition, the version 1 release includes a 5m posting mosaic covering the entire 20,000,000 km2 region. All products are publically available through arctidem.org, ESRI web services, and a web viewer. The final year of the project will consist of a complete refiltering of clouds/water and re-mosaicing of all elevation data. Since inception of the project, post-processing techniques have improved significantly, resulting in fewer voids, better registration, sharper coastlines, and fewer inaccuracies due to clouds. All ArcticDEM data will be released in 2018. Data, documentation, web services and web viewer are available at arcticdem.org

OPEN-SOURCE DIGITAL ELEVATION MODEL (DEMs EVALUATION WITH GPS AND LiDAR DATA

Directory of Open Access Journals (Sweden)

N. F. Khalid

2016-09-01

Full Text Available Advanced Spaceborne Thermal Emission and Reflection Radiometer-Global Digital Elevation Model (ASTER GDEM, Shuttle Radar Topography Mission (SRTM, and Global Multi-resolution Terrain Elevation Data 2010 (GMTED2010 are freely available Digital Elevation Model (DEM datasets for environmental modeling and studies. The quality of spatial resolution and vertical accuracy of the DEM data source has a great influence particularly on the accuracy specifically for inundation mapping. Most of the coastal inundation risk studies used the publicly available DEM to estimated the coastal inundation and associated damaged especially to human population based on the increment of sea level. In this study, the comparison between ground truth data from Global Positioning System (GPS observation and DEM is done to evaluate the accuracy of each DEM. The vertical accuracy of SRTM shows better result against ASTER and GMTED10 with an RMSE of 6.054 m. On top of the accuracy, the correlation of DEM is identified with the high determination of coefficient of 0.912 for SRTM. For coastal zone area, DEMs based on airborne light detection and ranging (LiDAR dataset was used as ground truth data relating to terrain height. In this case, the LiDAR DEM is compared against the new SRTM DEM after applying the scale factor. From the findings, the accuracy of the new DEM model from SRTM can be improved by applying scale factor. The result clearly shows that the value of RMSE exhibit slightly different when it reached 0.503 m. Hence, this new model is the most suitable and meets the accuracy requirement for coastal inundation risk assessment using open source data. The suitability of these datasets for further analysis on coastal management studies is vital to assess the potentially vulnerable areas caused by coastal inundation.

Impacts of DEM resolution and area threshold value uncertainty on ...

African Journals Online (AJOL)

... that DEM resolution influences the selected flow accumulation threshold value; the suitable flow accumulation threshold value increases as the DEM resolution increases, and shows greater variability for basins with lower drainage densities. The link between drainage area threshold value and stream network extraction ...

GLACIER VOLUME CHANGE ESTIMATION USING TIME SERIES OF IMPROVED ASTER DEMS

Directory of Open Access Journals (Sweden)

L. Girod

2016-06-01

Full Text Available Volume change data is critical to the understanding of glacier response to climate change. The Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER system embarked on the Terra (EOS AM-1 satellite has been a unique source of systematic stereoscopic images covering the whole globe at 15m resolution and at a consistent quality for over 15 years. While satellite stereo sensors with significantly improved radiometric and spatial resolution are available to date, the potential of ASTER data lies in its long consistent time series that is unrivaled, though not fully exploited for change analysis due to lack of data accuracy and precision. Here, we developed an improved method for ASTER DEM generation and implemented it in the open source photogrammetric library and software suite MicMac. The method relies on the computation of a rational polynomial coefficients (RPC model and the detection and correction of cross-track sensor jitter in order to compute DEMs. ASTER data are strongly affected by attitude jitter, mainly of approximately 4 km and 30 km wavelength, and improving the generation of ASTER DEMs requires removal of this effect. Our sensor modeling does not require ground control points and allows thus potentially for the automatic processing of large data volumes. As a proof of concept, we chose a set of glaciers with reference DEMs available to assess the quality of our measurements. We use time series of ASTER scenes from which we extracted DEMs with a ground sampling distance of 15m. Our method directly measures and accounts for the cross-track component of jitter so that the resulting DEMs are not contaminated by this process. Since the along-track component of jitter has the same direction as the stereo parallaxes, the two cannot be separated and the elevations extracted are thus contaminated by along-track jitter. Initial tests reveal no clear relation between the cross-track and along-track components so that the latter

Enhanced ASTER DEMs for Decadal Measurements of Glacier Elevation Changes

Science.gov (United States)

Girod, L.; Nuth, C.; Kääb, A.

2016-12-01

Elevation change data is critical to the understanding of a number of geophysical processes, including glaciers through the measurement their volume change. The Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) system on-board the Terra (EOS AM-1) satellite has been a unique source of systematic stereoscopic images covering the whole globe at 15m resolution and at a consistent quality for over 15 years. While satellite stereo sensors with significantly improved radiometric and spatial resolution are available today, the potential of ASTER data lies in its long consistent time series that is unrivaled, though not fully exploited for change analysis due to lack of data accuracy and precision. ASTER data are strongly affected by attitude jitter, mainly of approximately 4 and 30 km wavelength, and improving the generation of ASTER DEMs requires removal of this effect. We developed MMASTER, an improved method for ASTER DEM generation and implemented it in the open source photogrammetric library and software suite MicMac. The method relies on the computation of a rational polynomial coefficients (RPC) model and the detection and correction of cross-track sensor jitter in order to compute DEMs. Our sensor modeling does not require ground control points and thus potentially allows for automatic processing of large data volumes. When compared to ground truth data, we have assessed a ±5m accuracy in DEM differencing when using our processing method, improved from the ±30m when using the AST14DMO DEM product. We demonstrate and discuss this improved ASTER DEM quality for a number of glaciers in Greenland (See figure attached), Alaska, and Svalbard. The quality of our measurements promises to further unlock the underused potential of ASTER DEMs for glacier volume change time series on a global scale. The data produced by our method will thus help to better understand the response of glaciers to climate change and their influence on runoff and sea level.

Schreiben hat auch eine Stimme. Eine explorative Untersuchung über die Beziehung zwischen lautem Sprechen und Schreiben.

OpenAIRE

Lohmeier-Weidner, Yvonne (B. A.)

2017-01-01

Die Aufgabe in dieser Arbeit ist die Untersuchung der Beziehung zwischen lautem Sprechen und Schreiben im Schreibprozess. Grundlage ist die Annahme, dass beides zusammengehört und das Verbalisieren von Gedanken zum Schreiben, ob im Dialog oder im Selbstgespräch, selbiges positiv unterstützt. Dazu werden drei Studentinnen der Universität Paderborn, die an einem Abschlussarbeitenworkshop des Kompetenzzentrums Schreiben teilnahmen, durch ein fokussiertes Interview befragt. Diese Interviews werde...

[Walter Leitsch. Sigismund III. von Polen und Jan Zamoysky : die Rolle Estlands in der Rivalität zwischen König und Hetman] / Martin Faber

Index Scriptorium Estoniae

Faber, Martin

2009-01-01

Arvustus: Leitsch, Walter. Sigismund III. von Polen und Jan Zamoysky : die Rolle Estlands in der Rivalität zwischen König und Hetman. Wien : Verlag der Österreichischen Akademie der Wissenschaften, 2006

Mediendidaktik und Wissensmanagement

Directory of Open Access Journals (Sweden)

Gabi Reinmann-Rothmeier

2002-10-01

Full Text Available Mediendidaktik und Wissensmanagement – das ist auf den ersten Blick ein ungleiches Paar: Die Mediendidaktik ist eine Teildisziplin der (Medien- Pädagogik, während Wissensmanagement ein genuin wirtschaftliches Thema mit betriebswirtschaftlichen Akzenten ist. Annäherungen zwischen der Mediendidaktik und Wissensmanagement gibt es zum einen durch den sog. E-Learning-Trend seitens der Wirtschaft, der mediendidaktisches Wissen und Können auf den Plan ruft, zum anderen durch wachsendes Interesse am Thema Wissensmanagement seitens der Pädagogik. Der Beitrag beschreibt sowohl für das E-Learning als auch für das Wissensmanagement aus pädagogisch-psychologischer Sicht jeweils ein Orientierungsmodell; beide Modelle machen die Berührungspunkte zwischen Mediendidaktik und Wissensmanagement deutlich. Neben einem Überblick über wirtschaftliche Argumente für eine Verschmelzung von E-Learning und Wissensmanagement werden aufbauend auf den beiden Orientierungsmodellen theoretische und praktische Verbindungslinien zwischen E-Learning und Wissensmanagement sowie die Rolle der Mediendidaktik in dem daraus entstehenden Wechselverhältnis herausgearbeitet.

Volcanic geomorphology using TanDEM-X

Science.gov (United States)

Poland, Michael; Kubanek, Julia

2016-04-01

Topography is perhaps the most fundamental dataset for any volcano, yet is surprisingly difficult to collect, especially during the course of an eruption. For example, photogrammetry and lidar are time-intensive and often expensive, and they cannot be employed when the surface is obscured by clouds. Ground-based surveys can operate in poor weather but have poor spatial resolution and may expose personnel to hazardous conditions. Repeat passes of synthetic aperture radar (SAR) data provide excellent spatial resolution, but topography in areas of surface change (from vegetation swaying in the wind to physical changes in the landscape) between radar passes cannot be imaged. The German Space Agency's TanDEM-X satellite system, however, solves this issue by simultaneously acquiring SAR data of the surface using a pair of orbiting satellites, thereby removing temporal change as a complicating factor in SAR-based topographic mapping. TanDEM-X measurements have demonstrated exceptional value in mapping the topography of volcanic environments in as-yet limited applications. The data provide excellent resolution (down to ~3-m pixel size) and are useful for updating topographic data at volcanoes where surface change has occurred since the most recent topographic dataset was collected. Such data can be used for applications ranging from correcting radar interferograms for topography, to modeling flow pathways in support of hazards mitigation. The most valuable contributions, however, relate to calculating volume changes related to eruptive activity. For example, limited datasets have provided critical measurements of lava dome growth and collapse at volcanoes including Merapi (Indonesia), Colima (Mexico), and Soufriere Hills (Montserrat), and of basaltic lava flow emplacement at Tolbachik (Kamchatka), Etna (Italy), and Kīlauea (Hawai`i). With topographic data spanning an eruption, it is possible to calculate eruption rates - information that might not otherwise be available

Influence of Terraced area DEM Resolution on RUSLE LS Factor

Science.gov (United States)

Zhang, Hongming; Baartman, Jantiene E. M.; Yang, Xiaomei; Gai, Lingtong; Geissen, Viollette

2017-04-01

Topography has a large impact on the erosion of soil by water. Slope steepness and slope length are combined (the LS factor) in the universal soil-loss equation (USLE) and its revised version (RUSLE) for predicting soil erosion. The LS factor is usually extracted from a digital elevation model (DEM). The grid size of the DEM will thus influence the LS factor and the subsequent calculation of soil loss. Terracing is considered as a support practice factor (P) in the USLE/RUSLE equations, which is multiplied with the other USLE/RUSLE factors. However, as terraces change the slope length and steepness, they also affect the LS factor. The effect of DEM grid size on the LS factor has not been investigated for a terraced area. We obtained a high-resolution DEM by unmanned aerial vehicles (UAVs) photogrammetry, from which the slope steepness, slope length, and LS factor were extracted. The changes in these parameters at various DEM resolutions were then analysed. The DEM produced detailed LS-factor maps, particularly for low LS factors. High (small valleys, gullies, and terrace ridges) and low (flats and terrace fields) spatial frequencies were both sensitive to changes in resolution, so the areas of higher and lower slope steepness both decreased with increasing grid size. Average slope steepness decreased and average slope length increased with grid size. Slope length, however, had a larger effect than slope steepness on the LS factor as the grid size varied. The LS factor increased when the grid size increased from 0.5 to 30-m and increased significantly at grid sizes >5-m. The LS factor was increasingly overestimated as grid size decreased. The LS factor decreased from grid sizes of 30 to 100-m, because the details of the terraced terrain were gradually lost, but the factor was still overestimated.

Uncertainty of SWAT model at different DEM resolutions in a large mountainous watershed.

Science.gov (United States)

Zhang, Peipei; Liu, Ruimin; Bao, Yimeng; Wang, Jiawei; Yu, Wenwen; Shen, Zhenyao

2014-04-15

The objective of this study was to enhance understanding of the sensitivity of the SWAT model to the resolutions of Digital Elevation Models (DEMs) based on the analysis of multiple evaluation indicators. The Xiangxi River, a large tributary of Three Gorges Reservoir in China, was selected as the study area. A range of 17 DEM spatial resolutions, from 30 to 1000 m, was examined, and the annual and monthly model outputs based on each resolution were compared. The following results were obtained: (i) sediment yield was greatly affected by DEM resolution; (ii) the prediction of dissolved oxygen load was significantly affected by DEM resolutions coarser than 500 m; (iii) Total Nitrogen (TN) load was not greatly affected by the DEM resolution; (iv) Nitrate Nitrogen (NO₃-N) and Total Phosphorus (TP) loads were slightly affected by the DEM resolution; and (v) flow and Ammonia Nitrogen (NH₄-N) load were essentially unaffected by the DEM resolution. The flow and dissolved oxygen load decreased more significantly in the dry season than in the wet and normal seasons. Excluding flow and dissolved oxygen, the uncertainties of the other Hydrology/Non-point Source (H/NPS) pollution indicators were greater in the wet season than in the dry and normal seasons. Considering the temporal distribution uncertainties, the optimal DEM resolutions for flow was 30-200 m, for sediment and TP was 30-100 m, for dissolved oxygen and NO₃-N was 30-300 m, for NH₄-N was 30 to 70 m and for TN was 30-150 m. Copyright © 2014 Elsevier Ltd. All rights reserved.

Spatial Characterization of Landscapes through Multifractal Analysis of DEM

Directory of Open Access Journals (Sweden)

P. L. Aguado

2014-01-01

Full Text Available Landscape evolution is driven by abiotic, biotic, and anthropic factors. The interactions among these factors and their influence at different scales create a complex dynamic. Landscapes have been shown to exhibit numerous scaling laws, from Horton’s laws to more sophisticated scaling of heights in topography and river network topology. This scaling and multiscaling analysis has the potential to characterise the landscape in terms of the statistical signature of the measure selected. The study zone is a matrix obtained from a digital elevation model (DEM (map 10 × 10 m, and height 1 m that corresponds to homogeneous region with respect to soil characteristics and climatology known as “Monte El Pardo” although the water level of a reservoir and the topography play a main role on its organization and evolution. We have investigated whether the multifractal analysis of a DEM shows common features that can be used to reveal the underlying patterns and information associated with the landscape of the DEM mapping and studied the influence of the water level of the reservoir on the applied analysis. The results show that the use of the multifractal approach with mean absolute gradient data is a useful tool for analysing the topography represented by the DEM.

Artificial terraced field extraction based on high resolution DEMs

Science.gov (United States)

Na, Jiaming; Yang, Xin; Xiong, Liyang; Tang, Guoan

2017-04-01

With the increase of human activities, artificial landforms become one of the main terrain features with special geographical and hydrological value. Terraced field, as the most important artificial landscapes of the loess plateau, plays an important role in conserving soil and water. With the development of digital terrain analysis (DTA), there is a current and future need in developing a robust, repeatable and cost-effective research methodology for terraced fields. In this paper, a novel method using bidirectional DEM shaded relief is proposed for terraced field identification based on high resolution DEM, taking Zhifanggou watershed, Shannxi province as the study area. Firstly, 1m DEM is obtained by low altitude aerial photogrammetry using Unmanned Aerial Vehicle (UAV), and 0.1m DOM is also obtained as the test data. Then, the positive and negative terrain segmentation is done to acquire the area of terraced field. Finally, a bidirectional DEM shaded relief is simulated to extract the ridges of each terraced field stages. The method in this paper can get not only polygon feature of the terraced field areas but also line feature of terraced field ridges. The accuracy is 89.7% compared with the artificial interpretation result from DOM. And additional experiment shows that this method has a strong robustness as well as high accuracy.

DEM-based research on the landform features of China

Science.gov (United States)

Tang, Guoan; Liu, Aili; Li, Fayuan; Zhou, Jieyu

2006-10-01

Landforms can be described and identified by parameterization of digital elevation model (DEM). This paper discusses the large-scale geomorphological characteristics of China based on numerical analysis of terrain parameters and develop a methodology for characterizing landforms from DEMs. The methodology is implemented as a two-step process. First, terrain variables are derived from a 1-km DEM in a given statistical unit including local relief, the earth's surface incision, elevation variance coefficient, roughness, mean slope and mean elevation. Second, every parameter regarded as a single-band image is combined into a multi-band image. Then ISODATA unsupervised classification and the Bayesian technique of Maximum Likelihood supervised classification are applied for landform classification. The resulting landforms are evaluated by the means of Stratified Sampling with respect to an existing map and the overall classification accuracy reaches to rather high value. It's shown that the derived parameters carry sufficient physiographic information and can be used for landform classification. Since the classification method integrates manifold terrain indexes, conquers the limitation of the subjective cognition, as well as a low cost, apparently it could represent an applied foreground in the classification of macroscopic relief forms. Furthermore, it exhibits significance in consummating the theory and the methodology of DEMs on digital terrain analysis.

Accuracy assessment of the global TanDEM-X Digital Elevation Model with GPS data

Science.gov (United States)

Wessel, Birgit; Huber, Martin; Wohlfart, Christian; Marschalk, Ursula; Kosmann, Detlev; Roth, Achim

2018-05-01

The primary goal of the German TanDEM-X mission is the generation of a highly accurate and global Digital Elevation Model (DEM) with global accuracies of at least 10 m absolute height error (linear 90% error). The global TanDEM-X DEM acquired with single-pass SAR interferometry was finished in September 2016. This paper provides a unique accuracy assessment of the final TanDEM-X global DEM using two different GPS point reference data sets, which are distributed across all continents, to fully characterize the absolute height error. Firstly, the absolute vertical accuracy is examined by about three million globally distributed kinematic GPS (KGPS) points derived from 19 KGPS tracks covering a total length of about 66,000 km. Secondly, a comparison is performed with more than 23,000 "GPS on Bench Marks" (GPS-on-BM) points provided by the US National Geodetic Survey (NGS) scattered across 14 different land cover types of the US National Land Cover Data base (NLCD). Both GPS comparisons prove an absolute vertical mean error of TanDEM-X DEM smaller than ±0.20 m, a Root Means Square Error (RMSE) smaller than 1.4 m and an excellent absolute 90% linear height error below 2 m. The RMSE values are sensitive to land cover types. For low vegetation the RMSE is ±1.1 m, whereas it is slightly higher for developed areas (±1.4 m) and for forests (±1.8 m). This validation confirms an outstanding absolute height error at 90% confidence level of the global TanDEM-X DEM outperforming the requirement by a factor of five. Due to its extensive and globally distributed reference data sets, this study is of considerable interests for scientific and commercial applications.

Fortalecimiento de las habilidades emocionales de los educadores: interacción en los ambientes virtuales

Directory of Open Access Journals (Sweden)

Andrés Chiappe

2013-12-01

Full Text Available El artículo muestra los resultados de una investigación acerca del fortalecimiento de la inteligencia emocional de los profesores. Se partió del diagnóstico de las habilidades de los profesores participantes: automotivación, autoconocimiento, autocontrol, empatía y destreza. Posteriormente se diseñó e implementó un ambiente de aprendizaje mediado por las TIC, para identificar oportunidades de mejora en el autocontrol y la empatía. La investigación mostró que la interacción en estos Ambientes Virtuales de Aprendizaje, sobre todo aquellos diseñados sobre escenarios de colaboración, contribuyen al fortalecimiento de habilidades emocionales relacionadas con la capacidad para percibir, comprender y regular las emociones propias y las de los demás.

DEM Resolution Impact on the Estimation of the Physical Characteristics of Watersheds by Using SWAT

Directory of Open Access Journals (Sweden)

Waranyu Buakhao

2016-01-01

Full Text Available A digital elevation model (DEM is an important spatial input for automatic extraction of topographic parameters for the soil and water assessment tool (SWAT. The objective of this study was to investigate the impact of DEM resolution (from 5 to 90 m on the delineation process of a SWAT model with two types of watershed characteristics (flat area and mountain area and three sizes of watershed area (about 20,000, 200,000, and 1,500,000 hectares. The results showed that the total lengths of the streamline, main channel slope, watershed area, and area slope were significantly different when using the DEM datasets to delineate. Delineation using the SRTM DEM (90 m, ASTER DEM (30 m, and LDD DEM (5 m for all watershed characteristics showed that the watershed sizes and shapes obtained were only slightly different, whereas the area slopes obtained were significantly different. The total lengths of the generated streams increased when the resolution of the DEM used was higher. The stream slopes obtained using the small area sizes were insignificant, whereas the slopes obtained using the large area sizes were significantly different. This suggests that water resource model users should use the ASTER DEM as opposed to a finer resolution DEM for model input to save time for the model calibration and validation.

Einsatzmöglichkeiten eines Verriegelungsnagelsystems für die Katze inklusive der Bestimmung der Durchleuchtungszeiten bei der Implantation

OpenAIRE

Fiedler, Angelika Marion

2016-01-01

Im prospektiven Studienteil wurden Anwendbarkeit, Operationszeiten, Durchleuchtungseinsatz, Heilungsverlauf und Komplikationen bei der Versorgung von 25 Humerus-, Femur- und Tibiafrakturen der Katze mit dem MarMed Verriegelungsnagel(VN)-System untersucht. Die Röntgenbeurteilung fand durch 2 Beurteiler unabhängig voneinander statt. Zwischen den Beurteilern und den Wiederholungen der Knochenmessungen bestand eine sehr gute Übereinstimmung. Für Achsenabweichungen, Implantatsitz und Heilungsphase...

Halt mich fest! Picasso und die Identitätskrise der Ikonographie als Mutter der Kunst-Interpretation

OpenAIRE

Bärbel Küster

2004-01-01

Picassos Ölgemälde La Vie (Das Leben) von 1903 gilt als ein Bild, in dem der junge Picasso den Tod eines nahen Freundes und zugleich die Ablösung vom Elternhaus verarbeitet. Becht-Jördens und Wehmeier spitzen diese Interpretation durch die ikonographische Lesart einzelner Gesten zu einer tiefenpsychologischen Ausdeutung der Beziehung zwischen Künstler-Sohn und Mutter zu.

Leitung und Kooperation in wissenschaftlichen Bibliotheken Berlins - eine empirische Untersuchung

OpenAIRE

Paul, Gerhard

1998-01-01

Die vorliegende Arbeit greift ein im bibliotheks- und IuK-wissenschaftlichen sowie im fachprofessionellen Diskurs bisher weitgehend vernachlässigtes, aber immer bedeutsameres Thema auf: das vertikale soziale Geschehen in der Arbeitsorganisation ?wissenschaftliche Bibliothek". Die Absicht der Untersuchung lag darin, einen Zusammenhang zwischen dem Interaktionsverhalten der Leitungspersonen einerseits und der Mobilisierung von Leistungs- und Innovationspotentialen bei den Mitarbeiterinnen und M...

Gleichstellungsgesetze: Transformationsprobleme mit Verfassungsrang

Directory of Open Access Journals (Sweden)

Regina Harzer

2008-07-01

Full Text Available Im Allgemeinen werden gesetzliche Regelungen unmittelbar nach ihrem Inkrafttreten ‚kommentiert‘. Demgegenüber liegt zwischen dem „Gesetz zur Gleichstellung von Frauen und Männern für das Land Nordrhein-Westfalen (Landesgleichstellungsgesetz – LGG NRW"gesetz auf den Markt gebracht hat; und seit 2005 wird die Zeitschrift Gleichstellung in der Praxis (GiP vom selben Verlag herausgegeben.

Dem Generation from Close-Range Photogrammetry Using Extended Python Photogrammetry Toolbox

Science.gov (United States)

Belmonte, A. A.; Biong, M. M. P.; Macatulad, E. G.

2017-10-01

Digital elevation models (DEMs) are widely used raster data for different applications concerning terrain, such as for flood modelling, viewshed analysis, mining, land development, engineering design projects, to name a few. DEMs can be obtained through various methods, including topographic survey, LiDAR or photogrammetry, and internet sources. Terrestrial close-range photogrammetry is one of the alternative methods to produce DEMs through the processing of images using photogrammetry software. There are already powerful photogrammetry software that are commercially-available and can produce high-accuracy DEMs. However, this entails corresponding cost. Although, some of these software have free or demo trials, these trials have limits in their usable features and usage time. One alternative is the use of free and open-source software (FOSS), such as the Python Photogrammetry Toolbox (PPT), which provides an interface for performing photogrammetric processes implemented through python script. For relatively small areas such as in mining or construction excavation, a relatively inexpensive, fast and accurate method would be advantageous. In this study, PPT was used to generate 3D point cloud data from images of an open pit excavation. The PPT was extended to add an algorithm converting the generated point cloud data into a usable DEM.

The role of DEM at CERN

CERN Document Server

Van der Bij, E

2005-01-01

The DEM group in the Technical Support department provides services for the fabrication of special printed circuits that are invaluable for the whole particle physics community. The capability is based around a core technology that is developed by using skills to etch and process materials that are not commonly used in industry, combined with production methods used in PCB manufacturing. The role of the prototyping facilities is to assist engineers and physicists and to offer them easy access to competencies often not available from industry. At the same time, with the expertise and production capacity available, it makes that CERN is always geared up to handle emergency situations. The design office and the assembly workshop that are also part of DEM have similar roles that lower the cost and improve the quality and maintainability of electronics developed at CERN.

Developmental Eye Movement (DEM Test Norms for Mandarin Chinese-Speaking Chinese Children.

Directory of Open Access Journals (Sweden)

Yachun Xie

Full Text Available The Developmental Eye Movement (DEM test is commonly used as a clinical visual-verbal ocular motor assessment tool to screen and diagnose reading problems at the onset. No established norm exists for using the DEM test with Mandarin Chinese-speaking Chinese children. This study aims to establish the normative values of the DEM test for the Mandarin Chinese-speaking population in China; it also aims to compare the values with three other published norms for English-, Spanish-, and Cantonese-speaking Chinese children. A random stratified sampling method was used to recruit children from eight kindergartens and eight primary schools in the main urban and suburban areas of Nanjing. A total of 1,425 Mandarin Chinese-speaking children aged 5 to 12 years took the DEM test in Mandarin Chinese. A digital recorder was used to record the process. All of the subjects completed a symptomatology survey, and their DEM scores were determined by a trained tester. The scores were computed using the formula in the DEM manual, except that the "vertical scores" were adjusted by taking the vertical errors into consideration. The results were compared with the three other published norms. In our subjects, a general decrease with age was observed for the four eye movement indexes: vertical score, adjusted horizontal score, ratio, and total error. For both the vertical and adjusted horizontal scores, the Mandarin Chinese-speaking children completed the tests much more quickly than the norms for English- and Spanish-speaking children. However, the same group completed the test slightly more slowly than the norms for Cantonese-speaking children. The differences in the means were significant (P0.05; compared with Spanish-speaking children, the scores were statistically significant (P0.05. DEM norms may be affected by differences in language, cultural, and educational systems among various ethnicities. The norms of the DEM test are proposed for use with Mandarin Chinese

High-Accuracy Tidal Flat Digital Elevation Model Construction Using TanDEM-X Science Phase Data

Science.gov (United States)

Lee, Seung-Kuk; Ryu, Joo-Hyung

2017-01-01

This study explored the feasibility of using TanDEM-X (TDX) interferometric observations of tidal flats for digital elevation model (DEM) construction. Our goal was to generate high-precision DEMs in tidal flat areas, because accurate intertidal zone data are essential for monitoring coastal environment sand erosion processes. To monitor dynamic coastal changes caused by waves, currents, and tides, very accurate DEMs with high spatial resolution are required. The bi- and monostatic modes of the TDX interferometer employed during the TDX science phase provided a great opportunity for highly accurate intertidal DEM construction using radar interferometry with no time lag (bistatic mode) or an approximately 10-s temporal baseline (monostatic mode) between the master and slave synthetic aperture radar image acquisitions. In this study, DEM construction in tidal flat areas was first optimized based on the TDX system parameters used in various TDX modes. We successfully generated intertidal zone DEMs with 57-m spatial resolutions and interferometric height accuracies better than 0.15 m for three representative tidal flats on the west coast of the Korean Peninsula. Finally, we validated these TDX DEMs against real-time kinematic-GPS measurements acquired in two tidal flat areas; the correlation coefficient was 0.97 with a root mean square error of 0.20 m.

Analysis the Accuracy of Digital Elevation Model (DEM) for Flood Modelling on Lowland Area

Science.gov (United States)

Zainol Abidin, Ku Hasna Zainurin Ku; Razi, Mohd Adib Mohammad; Bukari, Saifullizan Mohd

2018-04-01

Flood is one type of natural disaster that occurs almost every year in Malaysia. Commonly the lowland areas are the worst affected areas. This kind of disaster is controllable by using an accurate data for proposing any kinds of solutions. Elevation data is one of the data used to produce solutions for flooding. Currently, the research about the application of Digital Elevation Model (DEM) in hydrology was increased where this kind of model will identify the elevation for required areas. University of Tun Hussein Onn Malaysia is one of the lowland areas which facing flood problems on 2006. Therefore, this area was chosen in order to produce DEM which focussed on University Health Centre (PKU) and drainage area around Civil and Environment Faculty (FKAAS). Unmanned Aerial Vehicle used to collect aerial photos data then undergoes a process of generating DEM according to three types of accuracy and quality from Agisoft PhotoScan software. The higher the level of accuracy and quality of DEM produced, the longer time taken to generate a DEM. The reading of the errors created while producing the DEM shows almost 0.01 different. Therefore, it has been identified there are some important parameters which influenced the accuracy of DEM.

Eröffnung des „Hauses der Astronomie“ auf dem Königsstuhl

OpenAIRE

Pössel, Markus; Tschira, Klaus

2012-01-01

Mit dem „Haus der Astronomie“ (HdA) auf dem Königsstuhl ist ein neues Zentrum für astronomische Bildungs- und Öffentlichkeitsarbeit in Heidelberg eröffnet. Das Haus der Astronomie ist eine gemeinsame Einrichtung der Max-Planck-Gesellschaft (MPG) und der Klaus Tschira Stiftung unter Beteiligung der Stadt Heidelberg und der Ruperto Carola, deren Zentrum für Astronomie eng mit dem HdA zusammenarbeitet. Ziel des HdA ist es, astronomische Forschung einer breiten Öffentlichkeit in verständlicher Fo...

Relative Error Evaluation to Typical Open Global dem Datasets in Shanxi Plateau of China

Science.gov (United States)

Zhao, S.; Zhang, S.; Cheng, W.

2018-04-01

Produced by radar data or stereo remote sensing image pairs, global DEM datasets are one of the most important types for DEM data. Relative error relates to surface quality created by DEM data, so it relates to geomorphology and hydrologic applications using DEM data. Taking Shanxi Plateau of China as the study area, this research evaluated the relative error to typical open global DEM datasets including Shuttle Radar Terrain Mission (SRTM) data with 1 arc second resolution (SRTM1), SRTM data with 3 arc second resolution (SRTM3), ASTER global DEM data in the second version (GDEM-v2) and ALOS world 3D-30m (AW3D) data. Through process and selection, more than 300,000 ICESat/GLA14 points were used as the GCP data, and the vertical error was computed and compared among four typical global DEM datasets. Then, more than 2,600,000 ICESat/GLA14 point pairs were acquired using the distance threshold between 100 m and 500 m. Meanwhile, the horizontal distance between every point pair was computed, so the relative error was achieved using slope values based on vertical error difference and the horizontal distance of the point pairs. Finally, false slope ratio (FSR) index was computed through analyzing the difference between DEM and ICESat/GLA14 values for every point pair. Both relative error and FSR index were categorically compared for the four DEM datasets under different slope classes. Research results show: Overall, AW3D has the lowest relative error values in mean error, mean absolute error, root mean square error and standard deviation error; then the SRTM1 data, its values are a little higher than AW3D data; the SRTM3 and GDEM-v2 data have the highest relative error values, and the values for the two datasets are similar. Considering different slope conditions, all the four DEM data have better performance in flat areas but worse performance in sloping regions; AW3D has the best performance in all the slope classes, a litter better than SRTM1; with slope increasing

a High Precision dem Extraction Method Based on Insar Data

Science.gov (United States)

Wang, Xinshuang; Liu, Lingling; Shi, Xiaoliang; Huang, Xitao; Geng, Wei

2018-04-01

In the 13th Five-Year Plan for Geoinformatics Business, it is proposed that the new InSAR technology should be applied to surveying and mapping production, which will become the innovation driving force of geoinformatics industry. This paper will study closely around the new outline of surveying and mapping and then achieve the TerraSAR/TanDEM data of Bin County in Shaanxi Province in X band. The studying steps are as follows; Firstly, the baseline is estimated from the orbital data; Secondly, the interferometric pairs of SAR image are accurately registered; Thirdly, the interferogram is generated; Fourth, the interferometric correlation information is estimated and the flat-earth phase is removed. In order to solve the phase noise and the discontinuity phase existing in the interferometric image of phase, a GAMMA adaptive filtering method is adopted. Aiming at the "hole" problem of missing data in low coherent area, the interpolation method of low coherent area mask is used to assist the phase unwrapping. Then, the accuracy of the interferometric baseline is estimated from the ground control points. Finally, 1 : 50000 DEM is generated, and the existing DEM data is used to verify the accuracy through statistical analysis. The research results show that the improved InSAR data processing method in this paper can obtain the high-precision DEM of the study area, exactly the same with the topography of reference DEM. The R2 can reach to 0.9648, showing a strong positive correlation.

Die Bedeutung von Interleukon-1 beo der Entstehung der Knochenerosion

Directory of Open Access Journals (Sweden)

Graninger W

2002-01-01

Full Text Available Die chronische Polyarthritis ist eine immunmediierte entzündliche Erkrankung, die morphologisch durch eine Zerstörung der Gelenksstrukturen und des subchondralen Knochens charakterisiert ist. Obwohl schon in frühen Krankheitsstadien eine gelenksnahe Osteoporose im Nativröntgen sichtbar wird, ist die Richtigkeit der Diagnose radiologisch erst durch den Nachweis jener typischen Knochenzerstörung zu beweisen, die als Usur oder Erosion bezeichnet wird. An der Grenze zwischen dem entzündlichen Zellinfiltrat, das als Pannus makroskopisch und histologisch imponiert, und dem Gelenksknorpel (cartilage-pannus junction kommt es unter dem Einfluß aktivierter Synoviafibroblasten und ihrer Sekretionsprodukte zum Knorpelzelluntergang und zur Zerstörung der Knorpelmatrix. Gleichzeitig kommt es zur Aktivierung von Osteoklasten, die schließlich in der Entstehung der gelenksnahen Erosion und der subchondralen Knochenzysten resultiert.

Smart Meter Rollout: Intelligente Messsysteme als Schnittstelle zum Kunden im Smart Grid und Smart Market

Science.gov (United States)

Vortanz, Karsten; Zayer, Peter

Das Gesetz zur Digitalisierung der Energiewende ist verabschiedet. Ab 2017 sind moderne Messeinrichtungen (mME) und intelligente Messsysteme (iMSys) zu verbauen und zu betreiben. Der "deutsche Weg" für die Einführung von Smart Metern sieht einen stufenweisen Rollout sowie ein Höchstmaß an Informations- und Datensicherheit vor. Dabei spielen iMSys und mME eine wichtige Rolle bei der Neugestaltung der intelligenten Netze (Smart Grids) und des neuen Marktmodells (Smart Market). Dieser Beitrag beschäftigt sich mit den neuen Gesetzen, den Marktrollen und ihren Aufgaben, Datenschutz und Datensicherheit, dem iMSys als sichere Lösung, dem sicheren Betrieb von Smart Meter Gateways, Smart Grid - Smart Market, dem Zusammenspiel zwischen reguliertem Bereich und Markt, den Einsatzbereichen der iMSys sowie den Auswirkungen auf Prozesse und Systeme und gibt Handlungsempfehlungen.

COMPARISON AND CO-REGISTRATION OF DEMS GENERATED FROM HiRISE AND CTX IMAGES

Directory of Open Access Journals (Sweden)

Y. Wang

2016-06-01

Full Text Available Images from two sensors, the High-Resolution Imaging Science Experiment (HiRISE and the Context Camera (CTX, both on-board the Mars Reconnaissance Orbiter (MRO, were used to generate high-quality DEMs (Digital Elevation Models of the Martian surface. However, there were discrepancies between the DEMs generated from the images acquired by these two sensors due to various reasons, such as variations in boresight alignment between the two sensors during the flight in the complex environment. This paper presents a systematic investigation of the discrepancies between the DEMs generated from the HiRISE and CTX images. A combined adjustment algorithm is presented for the co-registration of HiRISE and CTX DEMs. Experimental analysis was carried out using the HiRISE and CTX images collected at the Mars Rover landing site and several other typical regions. The results indicated that there were systematic offsets between the HiRISE and CTX DEMs in the longitude and latitude directions. However, the offset in the altitude was less obvious. After combined adjustment, the offsets were eliminated and the HiRISE and CTX DEMs were co-registered to each other. The presented research is of significance for the synergistic use of HiRISE and CTX images for precision Mars topographic mapping.

Der Briefwechsel zwischen Alexander von Humboldt und Karl Ernst von Baer

Directory of Open Access Journals (Sweden)

Thomas Schmuck

2012-10-01

Full Text Available Zusammenfassung Der kurze, nicht vollständig erhaltene Briefwechsel zwischen Alexander von Humboldt und Karl Ernst von Baer behandelt sehr verschiedene Themen: Politik, Kriegsgefahr, den Wissenschaftsbetrieb, Auszeichnungen und Tagungen, Embryologie und Cholera. Gemeinsam mit Briefen und Reden ergibt sich dabei ein differenziertes Bild der Beurteilung der beiden Wissenschaftler durch den jeweils anderen. Während Baer sich als Bewunderer Humboldts erweist, erscheint umgekehrt Humboldts Einschätzung Baers als ambivalent. Abstract The short, not completely preserved correspondence between Alexander von Humboldt and Karl Ernst von Baer deals with a wide range of subjects: politics and the danger of war, academic activities, scientific awards and conferences, aspects of embryology and the cholera. Letters to third persons and speeches, together with the correspondence between Humboldt and Baer show a differentiated pattern of mutual appraisal: While Baer always remained an admirer of the elder naturalist, Humboldt’s estimation was characterized by ambivalence.

Optimizing digital elevation models (DEMs) accuracy for planning and design of mobile communication networks

Science.gov (United States)

Hassan, Mahmoud A.

2004-02-01

Digital elevation models (DEMs) are important tools in the planning, design and maintenance of mobile communication networks. This research paper proposes a method for generating high accuracy DEMs based on SPOT satellite 1A stereo pair images, ground control points (GCP) and Erdas OrthoBASE Pro image processing software. DEMs with 0.2911 m mean error were achieved for the hilly and heavily populated city of Amman. The generated DEM was used to design a mobile communication network resulted in a minimum number of radio base transceiver stations, maximum number of covered regions and less than 2% of dead zones.

IceBridge DMS L3 Photogrammetric DEM

Data.gov (United States)

National Aeronautics and Space Administration — The IceBridge DMS L3 Photogrammetric DEM (IODMS3) data set contains gridded digital elevation models and orthorectified images of Greenland derived from the Digital...

Coupled calculation of external heat transfer and material temperatures of convection-cooled turbine blades. Final report; Gekoppelte Berechnung des aeusseren Waermeuebergangs und der Materialtemperaturen konvektionsgekuehlter Turbinenschaufeln. Abschlussbericht

Energy Technology Data Exchange (ETDEWEB)

Heselhaus, A.

1997-05-01

In this work a hybrid program system consisting of a 3D finite-volume Navier-Stokes flow solver and a 3D finite-element heat conduction solver has been developed. It enables the coupled calculation of structure temperatures in diabatic solid/fluid configurations. The grids of both the finite element and the finite volume computational domain may be completely independent. The coupled program fully resolves the thermal interaction between heat transfer and the resulting material temperatures. The developed coupling algorithm is numerically stable, conservative and works without the need to define ambient temperatures in the flowfield. This allows for the simulation of any solid/fluid configuration. When simulating combined blade/endwall cooling or filmcooling, only a coupled procedure is capable to completely account for the interaction between all relevant thermal parameters. It is found that the coupled calculation of convective cooling in a realistic guide vane leads locally to 45 K higher and 107 K lower blade temperatures than the uncoupled calculation. This shows that accounting for the thermal interaction between the flow and the structure offers both potential to save cooling air and a lower margin of safety when designing cooling systems close to the thermal limits of the blade material. (orig.) [Deutsch] Im Rahmen der vorliegenden Arbeit wurde ein Verfahren zur Berechnung der Temperaturverteilung in diabat umstroemten Koerpern entwickelt, bei dem ein 3D-Finite Volumen Navier-Stokes Stroemungsloeser und ein 3D-Finite Elemente Waermeleitungsloeser zu einem hybriden Programmsystem gekoppelt werden. Dabei besteht die Moeglichkeit, voellig unabhaengige Rechennetze fuer Stroemung und Struktur zu verwenden. Mit dem gekoppelten Verfahren kann die Wechselwirkung zwischen resultierenden Materialtemperaturen und dem davon rueck-beeinflussten Waermeuebergang beruecksichtigt werden. Weiterhin ist der hier entwickelte, stabile und konservative Kopplungsalgorithmus nicht

2016 USGS Lidar DEM: Maine QL2

Data.gov (United States)

National Oceanic and Atmospheric Administration, Department of Commerce — Product: These are Digital Elevation Model (DEM) data for Franklin, Oxford, Piscataquis, and Somerset Counties, Maine as part of the required deliverables for the...

Blaze-DEMGPU: Modular high performance DEM framework for the GPU architecture

Directory of Open Access Journals (Sweden)

Nicolin Govender

2016-01-01

Full Text Available Blaze-DEMGPU is a modular GPU based discrete element method (DEM framework that supports polyhedral shaped particles. The high level performance is attributed to the light weight and Single Instruction Multiple Data (SIMD that the GPU architecture offers. Blaze-DEMGPU offers suitable algorithms to conduct DEM simulations on the GPU and these algorithms can be extended and modified. Since a large number of scientific simulations are particle based, many of the algorithms and strategies for GPU implementation present in Blaze-DEMGPU can be applied to other fields. Blaze-DEMGPU will make it easier for new researchers to use high performance GPU computing as well as stimulate wider GPU research efforts by the DEM community.

EVALUATION OF AIRBORNE L- BAND MULTI-BASELINE POL-INSAR FOR DEM EXTRACTION BENEATH FOREST CANOPY

Directory of Open Access Journals (Sweden)

W. M. Li

2018-04-01

Full Text Available DEM beneath forest canopy is difficult to extract with optical stereo pairs, InSAR and Pol-InSAR techniques. Tomographic SAR (TomoSAR based on different penetration and view angles could reflect vertical structure and ground structure. This paper aims at evaluating the possibility of TomoSAR for underlying DEM extraction. Airborne L-band repeat-pass Pol-InSAR collected in BioSAR 2008 campaign was applied to reconstruct the 3D structure of forest. And sum of kronecker product and algebraic synthesis algorithm were used to extract ground structure, and phase linking algorithm was applied to estimate ground phase. Then Goldstein cut-branch approach was used to unwrap the phases and then estimated underlying DEM. The average difference between the extracted underlying DEM and Lidar DEM is about 3.39 m in our test site. And the result indicates that it is possible for underlying DEM estimation with airborne L-band repeat-pass TomoSAR technique.

Evaluation of Airborne l- Band Multi-Baseline Pol-Insar for dem Extraction Beneath Forest Canopy

Science.gov (United States)

Li, W. M.; Chen, E. X.; Li, Z. Y.; Jiang, C.; Jia, Y.

2018-04-01

DEM beneath forest canopy is difficult to extract with optical stereo pairs, InSAR and Pol-InSAR techniques. Tomographic SAR (TomoSAR) based on different penetration and view angles could reflect vertical structure and ground structure. This paper aims at evaluating the possibility of TomoSAR for underlying DEM extraction. Airborne L-band repeat-pass Pol-InSAR collected in BioSAR 2008 campaign was applied to reconstruct the 3D structure of forest. And sum of kronecker product and algebraic synthesis algorithm were used to extract ground structure, and phase linking algorithm was applied to estimate ground phase. Then Goldstein cut-branch approach was used to unwrap the phases and then estimated underlying DEM. The average difference between the extracted underlying DEM and Lidar DEM is about 3.39 m in our test site. And the result indicates that it is possible for underlying DEM estimation with airborne L-band repeat-pass TomoSAR technique.

Selektion und Qualifikation von non-professionellen Helfern für die psychologische Nothilfe

OpenAIRE

Hersberger, Johanna

2006-01-01

Mit der Vereinbarung einer Zusammenarbeit zwischen dem Bundesamt für Bevölkerungsschutz (BABS) und der Föderation der Schweizer Psychologinnen und Psychologen (FSP) vom Oktober 2000 wurden die Grundlagen für die gemeinsame Ausbildung von non-professionellen Helfern in psychologischer Nothilfe gelegt. Ausgehend von einer heterogenen Ausbildungslandschaft und uneinheitlichen Einsatzgepflogenheiten hatte die Kooperation BABS/FSP den Anspruch, nicht nur eine den wissenschaftlich...

Innovative Techniken und Algorithmen im Bereich Computational-Finance und Risikomanagement

OpenAIRE

Liang, Qian

2012-01-01

Diese Dissertation besteht aus zwei aktuellen Themen im Bereich Finanzmathematik, die voneinander unabhängig sind. Beim ersten Thema, "Flexible Algorithmen zur Bewertung komplexer Optionen mit mehreren Eigenschaften mittels der funktionalen Programmiersprache Haskell", handelt es sich um ein interdisziplinäres Projekt, in dem eine wissenschaftliche Brücke zwischen der Optionsbewertung und der funktionalen Programmierung geschlagen wurde. Im diesem Projekt wurde eine funktionale Biblio...

Return from the ant

OpenAIRE

Brückner, Sven

2000-01-01

Die vorliegende Dissertation hat einen technologischen und einen anwendungsbezogenen Schwerpunkt. Technologisch ordnen sich die präsentierten Forschungsergebnisse in das Gebiet der "Swarm Intelligence" (dt.: Schwarm-Intelligenz) ein. Swarm Intelligence ist ein Teilbereich der Informatik, der sich an der Überschneidung zwischen der Multi-Agenten Systeme Forschung der Künstlichen Intelligenz und dem Forschungsgebiet "Artificial Life" (dt.: Künstliches Leben) befindet. Im Gegensatz zur Swarm Int...

Imagem, texto, sensibilização, criatividade

Directory of Open Access Journals (Sweden)

João Azenha Junior

1997-11-01

Full Text Available Ziel dieses Beitrags ist es, die dynamische Wechselbeziehung zwischen Bild und Text bei der didaktischen Bearbeitung verschiedener Textsorten im Rahmen der Fremdsprachen- bzw. Übersetzungsdidaktik zu untersuchen. Am Beispiel von Textsorten aus dem Bereich der Wissenschaft, Technik, Literatur und Sprachvermittlung wird versucht, erfolgreiche und mißlungene Anwendungen ikonischer Mittel bei der Textproduktion unter die Lupe zu nehmen und didaktische Konsequenzen daraus zu ziehen.

Announcement of the agreement between the Federal Ministry of Education, Science, Research and Technology of the Federal Republic of Germany and the Department of Energy of the United States about the exchange of information in the area of energy. As of November 30, 1994; Bekanntmachung der Vereinbarung zwischen dem Bundesministerium fuer Bildung, Wissenschaft, Forschung und Technologie der Bundesrepublik Deutschland und dem Department of Energy der Vereinigten Staaten ueber den Austausch von Informationen auf dem Energiegebiet. Vom 30. November 1994

Energy Technology Data Exchange (ETDEWEB)

NONE

1995-01-11

The contracting parties establish under this agreement for the benefit of both sides and as support for their research and development work in the field of energy and exchange of information in the area of energy. This exchange includes publicly available scientific-technical information, concluded energy research and development projects, current energy research and development projects, relevant facts and figures as well as research in the area of information technology. (orig./HP) [Deutsch] Die Vertragsparteien richten im Rahmen dieser Vereinbarung zum beiderseitigen Nutzen und zur Ergaenzung ihrer Forschungs- und Entwicklungsarbeiten auf dem Energiesektor einen Austausch von Informationen auf dem Energiegebiet ein. Dieser Austausch umfasst oeffentlich zugaengliche wissenschaftlich-technische Informationen ueber abgeschlossene Energieforschungs- und -entwicklungsvorhaben, laufende Energieforschungs- und -entwicklungsvorhaben, einschlaegige Fakten und Zahlen sowie informationstechnische Forschung. (orig./HP)

A photogrammetric DEM of Greenland based on 1978-1987 aerial photos: validation and integration with laser altimetry and satellite-derived DEMs

DEFF Research Database (Denmark)

Korsgaard, Niels Jákup; Kjær, Kurt H.; Nuth, Christopher

Here we present a DEM of Greenland covering all ice-free terrain and the margins of the GrIS and local glaciers and ice caps. The DEM is based on the 3534 photos used in the aero-triangulation which were recorded by the Danish Geodata Agency (then the Geodetic Institute) in survey campaigns...... spanning the period 1978-1987. The GrIS is covered tens of kilometers into the interior due to the large footprints of the photos (30 x 30 km) and control provided by the aero-triangulation. Thus, the data are ideal for providing information for analysis of ice marginal elevation change and also control...

2014 USACE NCMP Topobathy Lidar DEM: Oregon

Data.gov (United States)

National Oceanic and Atmospheric Administration, Department of Commerce — These Digital Elevation Model (DEM) files contain rasterized topobathy lidar elevations at a 1 m grid size, generated from data collected by the Coastal Zone Mapping...

FUSION OF MULTI-SCALE DEMS FROM DESCENT AND NAVCM IMAGES OF CHANG’E-3 USING COMPRESSED SENSING METHOD

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M. Peng

2017-07-01

Full Text Available The multi-source DEMs generated using the images acquired in the descent and landing phase and after landing contain supplementary information, and this makes it possible and beneficial to produce a higher-quality DEM through fusing the multi-scale DEMs. The proposed fusion method consists of three steps. First, source DEMs are split into small DEM patches, then the DEM patches are classified into a few groups by local density peaks clustering. Next, the grouped DEM patches are used for sub-dictionary learning by stochastic coordinate coding. The trained sub-dictionaries are combined into a dictionary for sparse representation. Finally, the simultaneous orthogonal matching pursuit (SOMP algorithm is used to achieve sparse representation. We use the real DEMs generated from Chang’e-3 descent images and navigation camera (Navcam stereo images to validate the proposed method. Through the experiments, we have reconstructed a seamless DEM with the highest resolution and the largest spatial coverage among the input data. The experimental results demonstrated the feasibility of the proposed method.

TanDEM-X the Earth surface observation project from space level - basis and mission status

Directory of Open Access Journals (Sweden)

Jerzy Wiśniowski

2015-03-01

Full Text Available TanDEM-X is DLR (Deutsches Zentrum für Luft- und Raumfahrt the Earth surface observation project using high-resolution SAR interferometry. It opens a new era in space borne radar remote sensing. The system is based on two satellites: TerraSAR-X (TSX and TanDEM-X (TDX flying on the very close, strictly controlled orbits. This paper gives an overview of the radar technology and overview of the TanDEM-X mission concept which is based on several innovative technologies. The primary objective of the mission is to deliver a global digital elevation model (DEM with an unprecedented accuracy, which is equal to or surpass the HRTI-3 specifications (12 m posting, relative height accuracy ±2 m for slope < 20% and ±4 m for slope > 20% [8]. Beyond that, TanDEM-X provides a highly reconfigurable platform for the demonstration of new radar imaging techniques and applications.[b]Keywords[/b]: remote sensing, Bistatic SAR, digital elevation model (DEM, Helix formation, SAR interferomery, HRTI-3, synchronization

EVALUATING THE ACCURACY OF DEM GENERATION ALGORITHMS FROM UAV IMAGERY

Directory of Open Access Journals (Sweden)

J. J. Ruiz

2013-08-01

Full Text Available In this work we evaluated how the use of different positioning systems affects the accuracy of Digital Elevation Models (DEMs generated from aerial imagery obtained with Unmanned Aerial Vehicles (UAVs. In this domain, state-of-the-art DEM generation algorithms suffer from typical errors obtained by GPS/INS devices in the position measurements associated with each picture obtained. The deviations from these measurements to real world positions are about meters. The experiments have been carried out using a small quadrotor in the indoor testbed at the Center for Advanced Aerospace Technologies (CATEC. This testbed houses a system that is able to track small markers mounted on the UAV and along the scenario with millimeter precision. This provides very precise position measurements, to which we can add random noise to simulate errors in different GPS receivers. The results showed that final DEM accuracy clearly depends on the positioning information.

Wozu eine Tagung zur Frage des Wozu´s der Medienbildung? Rückblick auf die Tagung "Medien – Wissen – Bildung"

Directory of Open Access Journals (Sweden)

Nina Grünberger

2015-03-01

Full Text Available Ende Februar 2015 fand an der Universität Innsbruck[1] eine weitere Ausgabe der Konferenz-Reihe Medien – Wissen – Bildung statt. Die diesjährige Tagung folgte dem Anspruch sich dem "Drehtürbegriff" Medienbildung zu nähern und diesen wissenschaftlich, theoretisch, praktisch und künstlerisch abzutasten und zu legitimieren. Das im Call[2] formulierte Ziel war es, in einer "interdisziplinären und internationalen Gemengelage Synergien" zwischen heterogenen Zugängen zu eruieren und sichtbar zu machen. Neben klassischen Vorträgen mit anschließender Diskussion fanden Lightning Talks, Poster Sessions, Workshops, Paper Discussions und ein Speed-Dating, bei dem im Schnellverfahren differente wissenschaftliche Zugänge kennengelernt und gegenübergestellt werden konnten, statt. Die übergeordneten Fragen lauteten: "Welche Zielvorstellungen generiert Medienbildung hier? Wozu wird diese betrieben?". Oder kurz: "Medienbildung wozu?"

Mr. Robot: Schizophrenie, Paranoia und korporative Gier

Directory of Open Access Journals (Sweden)

jan jagodzinski

2016-11-01

Full Text Available Der vorliegende Beitrag untersucht die erste Staffel von Mr. Robot (2015 − aus Gilles Deleuzes symptomatologischer Position, die sich auf das Spannungsfeld zwischen ‹dem Klinischen und dem Kritischen› fokussiert. Zum Zeitpunkt des Verfassens dieses Artikels war nur die erste Staffel verfügbar. Im Folgenden zeige ich am Beispiel der Hauptfigur Elliot Anderson, inwiefern die Serie Einblicke in unsere ‹Kontrollgesellschaft› – auch eine Deleuzsche Entwicklung – gewähren kann. Zudem wird ein Vergleich mit dem Film «Kein System ist sicher», der ähnliche gesellschaftliche Fragen thematisiert, vorgenommen. Obwohl ich auf medienpädagogische Aspekte nur indirekt eingehen werde, hebe ich im Laufe der Argumentation hervor, dass solche Fernsehnarrative das allgemeine Publikum oder das, was ich als ‹jedermann› beschreibe, mit ethischen Problemen und Dilemmata unserer globalen kapitalistischen Ordnung konfrontieren.

Estética do futebol: Brasil vs. Alemanha

Directory of Open Access Journals (Sweden)

Willi Bolle

1998-11-01

Full Text Available Im September 1977 trafen sich deutsche und brasilianische Literaturwissenschaftler in der Universität São Paulo, um den Stil zweier großer Fußball-Schulen zu kommentieren. Als "Textgrundlage" hatten wir das Spiel Deutschland : Brasilien ausgewählt (Endstand: 3 : 3; Halbzeitstand: 0 : 3, das im Juni 1993 in Washington zwischen den seinerzeit dreifachen Weltmeistern ausgetragen worden war. Hans Ulrich Gumbrecht (Universität Stanford schlug eine philosophische Reflexion über den Fußball vor, verbunden mit einer vergleichenden Analyse des Soccer und des American Football. In beiden Ballspielarten beobachtet er das magische Phänomen der "Produktion von Gegenwart". Sie trift in drei Arten von Funktionen zu Tage - ontologische Funktion (die Aktion gegen das Nichts, die "Epiphanie der Form" (der geniale Spielzug und Spannung zwischen Finalität und Telos (oder aus Inszenierung von Intentionalität und Kontingenz -, die sich sowohl im Football wie im Fußball beobachten lassen, aber in ganz verschiedener Zusammensetzung. Flávio Aguiar (Universität São Paulo hob in seinem Kommentar das Phänomen der leeren Spielräume und der Besetzung des Raums hervor. Antonio Medina (Universität São Paulo setze dem eher ontologischen Charakter des American Football den mimetischen Charakter des Fußballs entgegen, der (zumindest in Brasilien von dem Verhältnis zwischen Herren und Sklaven affiziert wird. José Miguel Wisnik (Universität São Paulo vertiefte die Dialektik zwischen der Herstellung von Gegenwart (Widerstand gegen Interpretation, negative Hermencutik und der Produktion von Sinn. In seiner Antwort erläuterte Gumbrecht, dass die Begriffe des leeren und des besetzten Raumes religiöse Tonalitäten mit sich bringen (die transzendentale Leere. Willi Bolle (Universität São Paulo stellte die Frage, inwiefern eine aus der Perspektive des Massensports Fußball entworfene Ästhetik dazu führen kann, den Begriff der Ästhetik neu zu denken.

Professionalisierung und Doping im Sport

OpenAIRE

Wüterich, Christoph

2004-01-01

Der Beitrag untersucht Zusammenhänge zwischen der zunehmenden Professionalisierung des Sports und dem Anstieg von Dopingvergehen. Er zeigt, dass im historischen Vergleich beide Phänomene nicht neu sind, dass sich die Probleme aufgrund der steigenden Bedeutung des Leistungssports aber zugespitzt haben. Ausgehend von einer juristischen und sozioökonomischen Analyse der Anreize zu Doping werden Lösungsvorschläge entwickelt. The author analyzes the interdependencies between a growing commercia...

Balanced scorecard - a novel management philosophy; Balanced scorecard - eine neue Management-Philosophie

Energy Technology Data Exchange (ETDEWEB)

Pendzialek, W.

1999-09-20

The article briefly explains the management philosophy elaborated by Kaplan and Norton, USA. (orig./CB) [German] Bei dem von Kaplan und Norton in den USA entwickelte Managementkonzept der Balanced Scorecard wird eine Uebergewichtung der finanziellen Ergebnisse verhindert. Es wird eine Ausgewogenheit zwischen langfristigen und kurzfristigen Zielen, monetaeren und nichtmonetaeren Kennzahlen, Spaet- und Fruehindikatoren sowie internen und externen Leistungsanforderungen angestrebt. Dies fuehrt zu einer vernetzten und multidimensionalen Betrachtungsweise. (orig./RHM)

Planung von Stückgut-Umschlagbereichen mit Hilfe wissensbasierter Bewertungsmethoden

OpenAIRE

Freudl, Gunther

2007-01-01

Die sich verschärfende Wettbewerbsituation auf dem Markt und der damit steigende Konkurrenzdruck zwischen den Unternehmen erfordert ein Ausschöpfen vorhandener Rationalisierungspotentiale. Dies gilt auch für den Umschlagsektor, denn hier entstehen aufgrund der häufig noch umständlichen Handhabungsvorgänge vermeidbare Kosten. Die Automatisierung, die im innerbetrieblichen Bereich schon weit fortgeschritten, dagegen bei der Verladung bislang eher sporadisch anzutreffen ist, bietet sich als eine...

Calculation of transient overvoltages in a 145-kV-cable termination by using the FDTD-method; Feldstaerkenberechnung bei transienten Spannungen an einem 145-kV-Endverschluss mit Hilfe des FDTD-Verfahrens

Energy Technology Data Exchange (ETDEWEB)

Gerhard, G.; Ioffe, A. [Gerhard-Mercator-Univ.-GH Duisburg (Germany). Fachgebiet Elektrische Energieuebertragung

1997-10-20

The transient electromagnetic field occured from the overvoltages in a slip-on cable termination was calculated by using the FDTD-method. The electric field strength in a gap between the cable shield and the stress cone was studied. (orig.) [Deutsch] Mit Hilfe des FDTD-Feldberechnungsverfahrens wird das transiente elektromagnetische Feld in einem Aufschiebeendverschluss untersucht, wobei ein Luftspalt zwischen den leitenden Teilen der Kabelader und dem Feldsteuerelement beruecksichtigt wird. (orig.)

"BiC in Sustainability?" : die Transparenz von Best in Class-Nachhaltigkeitsfonds in Deutschland

OpenAIRE

Schäfer, Henry; Bauer, Fabian; Bracht, Felix

2015-01-01

Der vorliegende Beitrag analysiert in Deutschland vertriebene Publikumsinvestmentfonds, die den Anspruch als Nachhaltigkeitsfonds erheben und nach dem Best in Class-Ansatz (BiC-Ansatz) in Kombination mit einem Negative-Screening (verstanden als Ausschlusskriterien) konstruiert sind. Ziel ist es zu erheben, auf welche Weise die den Fonds vom Anbieter zugrunde gelegten BiC- und Screening-Methoden Anlegern transparent gemacht werden und worin zwischen den Fonds diesbezüglich Unterschiede bestehe...

Estimating Horizontal Displacement between DEMs by Means of Particle Image Velocimetry Techniques

Directory of Open Access Journals (Sweden)

Juan F. Reinoso

2015-12-01

Full Text Available To date, digital terrain model (DTM accuracy has been studied almost exclusively by computing its height variable. However, the largely ignored horizontal component bears a great influence on the positional accuracy of certain linear features, e.g., in hydrological features. In an effort to fill this gap, we propose a means of measurement different from the geomatic approach, involving fluid mechanics (water and air flows or aerodynamics. The particle image velocimetry (PIV algorithm is proposed as an estimator of horizontal differences between digital elevation models (DEM in grid format. After applying a scale factor to the displacement estimated by the PIV algorithm, the mean error predicted is around one-seventh of the cell size of the DEM with the greatest spatial resolution, and around one-nineteenth of the cell size of the DEM with the least spatial resolution. Our methodology allows all kinds of DTMs to be compared once they are transformed into DEM format, while also allowing comparison of data from diverse capture methods, i.e., LiDAR versus photogrammetric data sources.

Acute environmental toxicity and persistence of DEM, a chemical agent simulant: Diethyl malonate. [Diethyl malonate

Energy Technology Data Exchange (ETDEWEB)

Cataldo, D.A.; Ligotke, M.W.; Harvey, S.D.; Fellows, R.J.; Li, Shu-mei W.; Van Voris, P.; Wentsel, R.S.

1990-05-01

The purpose of the following chemical simulant studies is to assess the potential acute environmental effects and persistence of diethyl malonate (DEM). Deposition velocities for DEM to soil surfaces ranged from 0.04 to 0.2 cm/sec. For foliar surfaces, deposition velocities ranged from 0.0002 cm/sec at low air concentrations to 0.05 cm/sec for high dose levels. The residence times or half-lives of DEM deposited to soils was 2 h for the fast component and 5 to 16 h for the residual material. DEM deposited to foliar surfaces also exhibited biphasic depuration. The half-life of the short residence time component ranged from 1 to 3 h, while the longer time component had half-times of 16 to 242 h. Volatilization and other depuration mechanisms reduce surface contaminant levels in both soils and foliage to less than 1% of initial dose within 96 h. DEM is not phytotoxic at foliar mass loading levels of less than 10 {mu}m/cm{sup 2}. However, severe damage is evident at mass loading levels in excess of 17 {mu}g/cm{sup 2}. Tall fescue and sagebrush were more affected than was short-needle pine, however, mass loading levels were markedly different. Regrowth of tall fescue indicated that the effects of DEM are residual, and growth rates are affected only at higher mass loadings through the second harvest. Results from in vitro testing of DEM indicated concentrations below 500 {mu}g/g dry soil generally did not negatively impact soil microbial activity. Short-term effects of DEM were more profound on soil dehydrogenase activity than on soil phosphatase activity. No enzyme inhibition or enhancement was observed after 28 days in incubation. Results of the earthworm bioassay indicate survival to be 86 and 66% at soil doses of 107 and 204 {mu}g DEM/cm{sup 2}, respectively. At higher dose level, activity or mobility was judged to be affected in over 50% of the individuals. 21 refs., 10 figs., 15 tabs.

Identification and delineation of areas flood hazard using high accuracy of DEM data

Science.gov (United States)

Riadi, B.; Barus, B.; Widiatmaka; Yanuar, M. J. P.; Pramudya, B.

2018-05-01

Flood incidents that often occur in Karawang regency need to be mitigated. These expectations exist on technologies that can predict, anticipate and reduce disaster risks. Flood modeling techniques using Digital Elevation Model (DEM) data can be applied in mitigation activities. High accuracy DEM data used in modeling, will result in better flooding flood models. The result of high accuracy DEM data processing will yield information about surface morphology which can be used to identify indication of flood hazard area. The purpose of this study was to identify and describe flood hazard areas by identifying wetland areas using DEM data and Landsat-8 images. TerraSAR-X high-resolution data is used to detect wetlands from landscapes, while land cover is identified by Landsat image data. The Topography Wetness Index (TWI) method is used to detect and identify wetland areas with basic DEM data, while for land cover analysis using Tasseled Cap Transformation (TCT) method. The result of TWI modeling yields information about potential land of flood. Overlay TWI map with land cover map that produces information that in Karawang regency the most vulnerable areas occur flooding in rice fields. The spatial accuracy of the flood hazard area in this study was 87%.

How large is the Upper Indus Basin? The pitfalls of auto-delineation using DEMs

Science.gov (United States)

Khan, Asif; Richards, Keith S.; Parker, Geoffrey T.; McRobie, Allan; Mukhopadhyay, Biswajit

2014-02-01

Extraction of watershed areas from Digital Elevation Models (DEMs) is increasingly required in a variety of environmental analyses. It is facilitated by the availability of DEMs based on remotely sensed data, and by Geographical Information System (GIS) software. However, accurate delineation depends on the quality of the DEM and the methodology adopted. This paper considers automated and supervised delineation in a case study of the Upper Indus Basin (UIB), Pakistan, for which published estimates of the basin area show significant disagreement, ranging from 166,000 to 266,000 km2. Automated delineation used ArcGIS Archydro and hydrology tools applied to three good quality DEMs (two from SRTM data with 90m resolution, and one from 30m resolution ASTER data). Automatic delineation defined a basin area of c.440,000 km2 for the UIB, but included a large area of internal drainage in the western Tibetan Plateau. It is shown that discrepancies between different estimates reflect differences in the initial extent of the DEM used for watershed delineation, and the unchecked effect of iterative pit-filling of the DEM (going beyond the filling of erroneous pixels to filling entire closed basins). For the UIB we have identified critical points where spurious addition of catchment area has arisen, and use Google Earth to examine the geomorphology adjacent to these points, and also examine the basin boundary data provided by the HydroSHEDS database. We show that the Pangong Tso watershed and some other areas in the western Tibetan plateau are not part of the UIB, but are areas of internal drainage. Our best estimate of the area of the Upper Indus Basin (at Besham Qila) is 164,867 km2 based on the SRTM DEM, and 164,853 km2 using the ASTER DEM). This matches the catchment area measured by WAPDA SWHP. An important lesson from this investigation is that one should not rely on automated delineation, as iterative pit-filling can produce spurious drainage networks and basins, when

Yearbook of wind energy law 2015; Jahrbuch Windenergierecht 2015

Energy Technology Data Exchange (ETDEWEB)

Brandt, Edmund (ed.) [Technische Univ. Braunschweig (Germany). Lehrstuhl Staats- und Verwaltungsrecht sowie Verwaltungswissenschaften; Koordinierungsstelle Windenergierecht k:wer, Braunschweig (Germany)

2016-08-01

In the yearbook 2015, the technical papers are dealing with the distance recommendations of the State Working Group of Bird Conservation Observatories, with aesthetics as a public interest in the planning and authorization regime for wind turbines, the prospect of the citizen and community participation law in Mecklenburg-Vorpommern, the conflict between wind turbines and weather radars and with the higher court jurisdiction for feed management. [German] Im Jahrbuch 2015 beschaeftigen sich die Fachbeitraege mit den Abstandsempfehlungen der Laenderarbeitsgemeinschaft der Vogelschutzwarten, mit Aesthetik als oeffentlichem Belang im Planungs- und Genehmigungsregime fuer Windenergieanlagen, dem Entwurf zum Buerger- und Gemeindenbeteiligungsgesetz Mecklenburg-Vorpommerns, dem Konflikt zwischen Windenergieanlagen und Wetterradaren und mit der obergerichtlichen Rechtsprechung zum Einspeisemanagement.

Zeitlicher Verlauf der avaskulären Nekrose des Hüftkopfes bei Patienten mit Pemphigus vulgaris.

Science.gov (United States)

Balighi, Kamran; Daneshpazhooh, Maryam; Aghazadeh, Nessa; Saeidi, Vahide; Shahpouri, Farzam; Hejazi, Pardis; Chams-Davatchi, Cheyda

2016-10-01

Pemphigus vulgaris (PV) wird in der Regel mit systemischen Corticosteroiden und Immunsuppressiva behandelt. Avaskuläre Nekrose (AVN) des Hüftkopfes ist eine gut bekannte schwerere Komplikation einer Corticosteroid-Therapie. Die Charakteristika dieser schweren Komplikation bei PV sind nach wie vor unbekannt. Nicht kontrollierte, retrospektive Untersuchung aller PV-bedingten AVN-Fälle, die in einer iranischen Klinik für bullöse Autoimmunerkrankungen zwischen 1985 und 2013 diagnostiziert wurden. Anhand der Krankenakten von 2321 untersuchten PV-Patienten wurden 45 Fälle (1,93 %) von femoraler AVN identifiziert. Dreißig davon waren Männer. Das mittlere Alter bei der Diagnose der AVN betrug 47,4 ± 14,2 Jahre. Der mittlere Zeitraum zwischen der Diagnose des PV und dem Einsetzen der AVN lag bei 25,3 ± 18,3 Monaten. Mit Ausnahme von acht Fällen (17,8 %) setzte die AVN bei der Mehrheit der Patienten innerhalb von drei Jahren nach Diagnose des PV ein. Die mittlere kumulative Dosis von Prednisolon bei Patienten mit AVN betrug 13.115,8 ± 7041,1 mg. Zwischen der Prednisolon-Gesamtdosis und dem Zeitraum bis zum Einsetzen der AVN bestand eine starke Korrelation (p = 0,001). Bei Patienten mit Alendronateinnahme in der Vorgeschichte war dieser Zeitraum signifikant kürzer (p = 0,01). Die AVN ist eine schwere Komplikation einer Corticosteroid-Behandlung bei Patienten mit PV. Sie wird bei 2 % der Patienten beobachtet und tritt vor allem in den ersten drei Behandlungsjahren auf. Bei Patienten, die höhere Dosen von Prednisolon erhalten, setzt die AVN tendenziell früher ein. © 2016 Deutsche Dermatologische Gesellschaft (DDG). Published by John Wiley & Sons Ltd.

Combined DEM Extration Method from StereoSAR and InSAR

Science.gov (United States)

Zhao, Z.; Zhang, J. X.; Duan, M. Y.; Huang, G. M.; Yang, S. C.

2015-06-01

A pair of SAR images acquired from different positions can be used to generate digital elevation model (DEM). Two techniques exploiting this characteristic have been introduced: stereo SAR and interferometric SAR. They permit to recover the third dimension (topography) and, at the same time, to identify the absolute position (geolocation) of pixels included in the imaged area, thus allowing the generation of DEMs. In this paper, StereoSAR and InSAR combined adjustment model are constructed, and unify DEM extraction from InSAR and StereoSAR into the same coordinate system, and then improve three dimensional positioning accuracy of the target. We assume that there are four images 1, 2, 3 and 4. One pair of SAR images 1,2 meet the required conditions for InSAR technology, while the other pair of SAR images 3,4 can form stereo image pairs. The phase model is based on InSAR rigorous imaging geometric model. The master image 1 and the slave image 2 will be used in InSAR processing, but the slave image 2 is only used in the course of establishment, and the pixels of the slave image 2 are relevant to the corresponding pixels of the master image 1 through image coregistration coefficient, and it calculates the corresponding phase. It doesn't require the slave image in the construction of the phase model. In Range-Doppler (RD) model, the range equation and Doppler equation are a function of target geolocation, while in the phase equation, the phase is also a function of target geolocation. We exploit combined adjustment model to deviation of target geolocation, thus the problem of target solution is changed to solve three unkonwns through seven equations. The model was tested for DEM extraction under spaceborne InSAR and StereoSAR data and compared with InSAR and StereoSAR methods respectively. The results showed that the model delivered a better performance on experimental imagery and can be used for DEM extraction applications.

[Lange, Thomas. Zwischen Reformation und Untergang Alt-Livlands. Der Rigaer Erzbischof Wilhelm von Brandenburg im Beziehungsgeflecht der livländischen Konföderation und ihrer Nachbarländer] / Madis Maasing

Index Scriptorium Estoniae

Maasing, Madis, 1984-

2014-01-01

Arvustus: Lange, Thomas. Zwischen Reformation und Untergang Alt-Livlands. Der Rigaer Erzbischof Wilhelm von Brandenburg im Beziehungsgeflecht der livländischen Konföderation und ihrer Nachbarländer

2015 USACE NCMP Topobathy Lidar DEM: Avalon (NJ)

Data.gov (United States)

National Oceanic and Atmospheric Administration, Department of Commerce — These Digital Elevation Model (DEM) files contain rasterized topobathy lidar elevations at a 1 m grid size, generated from data collected by the Coastal Zone Mapping...

2013 USACE NCMP Topobathy Lidar DEM: Niihau (HI)

Data.gov (United States)

National Oceanic and Atmospheric Administration, Department of Commerce — These Digital Elevation Model (DEM) files contain rasterized topobathy lidar elevations at a 1 m grid size, generated from data collected by the Coastal Zone Mapping...

Granular dynamics, contact mechanics and particle system simulations a DEM study

CERN Document Server

Thornton, Colin

2015-01-01

This book is devoted to the Discrete Element Method (DEM) technique, a discontinuum modelling approach that takes into account the fact that granular materials are composed of discrete particles which interact with each other at the microscale level. This numerical simulation technique can be used both for dispersed systems in which the particle-particle interactions are collisional and compact systems of particles with multiple enduring contacts. The book provides an extensive and detailed explanation of the theoretical background of DEM. Contact mechanics theories for elastic, elastic-plastic, adhesive elastic and adhesive elastic-plastic particle-particle interactions are presented. Other contact force models are also discussed, including corrections to some of these models as described in the literature, and important areas of further research are identified. A key issue in DEM simulations is whether or not a code can reliably simulate the simplest of systems, namely the single particle oblique impact wit...

DemQSAR: predicting human volume of distribution and clearance of drugs.

Science.gov (United States)

Demir-Kavuk, Ozgur; Bentzien, Jörg; Muegge, Ingo; Knapp, Ernst-Walter

2011-12-01

In silico methods characterizing molecular compounds with respect to pharmacologically relevant properties can accelerate the identification of new drugs and reduce their development costs. Quantitative structure-activity/-property relationship (QSAR/QSPR) correlate structure and physico-chemical properties of molecular compounds with a specific functional activity/property under study. Typically a large number of molecular features are generated for the compounds. In many cases the number of generated features exceeds the number of molecular compounds with known property values that are available for learning. Machine learning methods tend to overfit the training data in such situations, i.e. the method adjusts to very specific features of the training data, which are not characteristic for the considered property. This problem can be alleviated by diminishing the influence of unimportant, redundant or even misleading features. A better strategy is to eliminate such features completely. Ideally, a molecular property can be described by a small number of features that are chemically interpretable. The purpose of the present contribution is to provide a predictive modeling approach, which combines feature generation, feature selection, model building and control of overtraining into a single application called DemQSAR. DemQSAR is used to predict human volume of distribution (VD(ss)) and human clearance (CL). To control overtraining, quadratic and linear regularization terms were employed. A recursive feature selection approach is used to reduce the number of descriptors. The prediction performance is as good as the best predictions reported in the recent literature. The example presented here demonstrates that DemQSAR can generate a model that uses very few features while maintaining high predictive power. A standalone DemQSAR Java application for model building of any user defined property as well as a web interface for the prediction of human VD(ss) and CL is

On the COSMO-SkyMed Exploitation for Interferometric DEM Generation

Science.gov (United States)

Teresa, C. M.; Raffaele, N.; Oscar, N. D.; Fabio, B.

2011-12-01

DEM products for Earth observation space-borne applications are being to play a role of increasing importance due to the new generation of high resolution sensors (both optical and SAR). These new sensors demand elevation data for processing and, on the other hand, they provide new possibilities for DEM generation. Till now, for what concerns interferometric DEM, the Shuttle Radar Topography Mission (SRTM) has been the reference product for scientific applications all over the world. SRTM mission [1] had the challenging goal to meet the requirements for a homogeneous and reliable DEM fulfilling the DTED-2 specifications. However, new generation of high resolution sensors (including SAR) pose new requirements for elevation data in terms of vertical precision and spatial resolution. DEM are usually used as ancillary input in different processing steps as for instance geocoding and Differential SAR Interferometry. In this context, the recent SAR missions of DLR (TerraSAR-X and TanDEM-X) and ASI (COSMO-SkyMed) can play a promising role thanks to their high resolution both in space and time. In particular, the present work investigates the potentialities of the COSMO/SkyMed (CSK) constellation for ground elevation measurement with particular attention devoted to the impact of the improved spatial resolution wrt the previous SAR sensors. The recent scientific works, [2] and [3], have shown the advantages of using CSK in the monitoring of terrain deformations caused by landslides, earthquakes, etc. On the other hand, thanks to the high spatial resolution, CSK appears to be very promising in monitoring man-made structures, such as buildings, bridges, railways and highways, thus enabling new potential applications (urban applications, precise DEM, etc.). We present results obtained by processing both SPOTLIGHT and STRIPMAP acquisitions through standard SAR Interferometry as well as multi-pass interferometry [4] with the aim of measuring ground elevation. Acknowledgments

TecDEM: A MATLAB Based Toolbox for understanding Tectonics from Digital Elevation Models

Science.gov (United States)

Shahzad, F.; Mahmood, S. A.; Gloaguen, R.

2009-04-01

TecDEM is a MATLAB based tool box for understanding the tectonics from digital elevation models (DEMs) of any area. These DEMs can be derived from data of any spatial resolution (Low, medium and High). In the first step we extract drainage network from the DEMs using flow grid approach. Drainage network is a group of streams having elevation and catchment area information as a function of spatial locations. We implement an array of stream structure to study this drainage network. Knickpoints can be identified on each stream of the drainage network by a graphical user interface and are helpful for understanding stream morphology. Stream profile analysis in steady state condition is applied on all streams to calculate geomorphic parameters and regional uplift rates. Hack index is calculated for all the profiles at a certain interval and over the change of knickpoints. Reports menu of this tool box generates detailed statistics report, complete tabulated report, graphical output of each analyzed stream profile and Hack index profile. All the calculated values are part of stream structure and is saved as .mat file for later use with this tool box. The spatial distribution of geomorphic parameters, uplift rates and knickpoints are exported as a shape files for visualization in professional GIS software. We test this tool box on DEMs from different tectonic settings worldwide and received verifiable results with other studies.

Wie aus dem Nichts etwas entsteht Gespräche über Antimaterie

CERN Document Server

AUTHOR|(CDS)2051122

2018-01-01

Antimaterie beschäftigt nicht nur Physiker, sondern auch die Phantasie von Science fiction-Autoren, Star Trek-Fans und Laien. Aber was ist eigentlich Antimaterie, und wie stellt man sie her? Kann man sie speichern? Wird sie bald eine Rolle im Alltag spielen? Und warum verdanken wir unsere Existenz – und die unseres Universums – einem winzigen Unterschied zwischen Materie und Antimaterie? Rolf Landua, einer der weltweit führenden Experten auf diesem Gebiet, beantwortet in seinem neuen Buch anschaulich diese und andere Fragen.

Joint use of multi-orbit high-resolution SAR interferometry for DEM generation in mountainous area

KAUST Repository

Zhang, Lu; Jiang, Houjun; Liao, Mingsheng; Balz, Timo; Wang, Teng

2014-01-01

SAR interferometry has long been regarded as an effective tool for wide-area topographic mapping in hilly and mountainous areas. However, quality of InSAR DEM product is usually affected by atmospheric disturbances and decorrelation-induced voids, especially for data acquired in repeat-pass mode. In this paper, we proposed an approach for improved topographic mapping by optimal fusion of multi-orbit InSAR DEMs with correction of atmospheric phase screen (APS). An experimental study with highresolution TerraSAR-X and COSMO-SkyMed datasets covering a mountainous area was carried out to demonstrate the effectiveness of the proposed approach. Validation with a reference DEM of scale 1:50,000 indicated that vertical accuracy of the fused DEM can be better than 5 m.

Joint use of multi-orbit high-resolution SAR interferometry for DEM generation in mountainous area

KAUST Repository

Zhang, Lu

2014-07-01

SAR interferometry has long been regarded as an effective tool for wide-area topographic mapping in hilly and mountainous areas. However, quality of InSAR DEM product is usually affected by atmospheric disturbances and decorrelation-induced voids, especially for data acquired in repeat-pass mode. In this paper, we proposed an approach for improved topographic mapping by optimal fusion of multi-orbit InSAR DEMs with correction of atmospheric phase screen (APS). An experimental study with highresolution TerraSAR-X and COSMO-SkyMed datasets covering a mountainous area was carried out to demonstrate the effectiveness of the proposed approach. Validation with a reference DEM of scale 1:50,000 indicated that vertical accuracy of the fused DEM can be better than 5 m.

Ambient Space and Ambient Sensation

DEFF Research Database (Denmark)

Schmidt, Ulrik

The ambient is the aesthetic production of the sensation of being surrounded. As a concept, 'ambient' is mostly used in relation to the music genre 'ambient music' and Brian Eno's idea of environmental background music. However, the production of ambient sensations must be regarded as a central...... aspect of the aesthetization of modern culture in general, from architecture, transport and urbanized lifeforms to film, sound art, installation art and digital environments. This presentation will discuss the key aspects of ambient aesthetization, including issues such as objectlessness...

Demência na doença de Parkinson Dementia in Parkinsn's disease

Directory of Open Access Journals (Sweden)

Leonardo Caixeta

2008-12-01

Full Text Available OBJETIVO: A presença de síndromes psiquiátricas, incluindo demência, associada a distúrbios motores tem sido cada vez mais reconhecida durante a última década, com destaque para o prejuízo cognitivo na doença de Parkinson idiopática. Esta revisão enfocará a epidemiologia, os aspectos clínicos, diagnósticos diferenciais, mecanismos subjacentes e o tratamento da demência na doença de Parkinson idiopática. MÉTODO: Uma revisão da literatura dos estudos que investigaram a demência da doença de Parkinson idiopática foi realizada. RESULTADOS: A demência é altamente prevalente na doença de Parkinson idiopática. O protótipo da demência na doença de Parkinson idiopática consiste numa síndrome disexecutiva com comprometimento da atenção, funções executivas e, secundariamente, a memória. Neuroquimicamente, o déficit mais significativo parece ser colinérgico; a demência se correlaciona com a presença de corpos de Lewy corticais e límbicos. Evidências preliminares sugerem que os anticolinesterásicos podem ser efetivos na demência da doença de Parkinson idiopática. CONCLUSÕES: O prejuízo cognitivo na doença de Parkinson idiopática é associado a características próprias e é responsável por importante incapacidade nestes pacientes.OBJECTIVE: The concomitant presence of psychiatric syndromes, including dementia, with motor disturbance has been increasingly recognized during the last decade, with emphasis on cognitive impairment in idiopatic Parkinson's disease. This review will focus on the epidemiology, clinical aspects, differential diagnosis, underlying mechanisms and treatment of dementia in Parkinson's disease. METHOD: A literature review of the studies that investigated the dementia in Parkinson's disease was performed. RESULTS: Dementia is highly prevalent in Parkinson's disease. The prototype of dementia in Parkinson's disease is a dysexecutive syndrome with impaired attention, executive functions and

Die Entstehung einer Nachbarsegmentdekompensation nach lumbaler Spondylodese. Einfluß des sagitalen Profils

OpenAIRE

Noe, Stephan

2003-01-01

Die vorliegende Arbeit beschäftigt sich mit der Frage, ob ein Zusammenhang zwischen der frühen Dekompensation einer Nachbaretage neben einem fusioniertem Bandscheibensegment im Lendenwirbelsäulenbereich und dem sagittalen Profil der Lendenwirbelsäule besteht. Im Rahmen der Untersuchungen wurden in einer retrospektiven Untersuchung die Krankenakten und Röntgenbilder von 51 Patienten der Zentralkliniken Bad Berka (Wirbelsäulenchirurgie) und Patienten der Orthopädischen Klinik des Universitä...

Review: Janice M. Morse & Linda Niehaus (2009). Mixed method design: principles and procedures

OpenAIRE

Öhlen, Joakim

2010-01-01

Mixed-Method-Designs, in denen quantitative und qualitative Methoden Verwendung finden, erfreuen sich zunehmender Beliebtheit für die Untersuchung komplexer Phänomene. Die vorliegende Besprechung beschäftigt sich in diesem Zusammenhang mit dem Buch "Mixed Method Design: Principles and Procedures" von Janice M. MORSE und Linda NIEHAUS, die für solche Designs Kern- und Ergänzungskomponenten zu identifizieren versuchen. Hierzu differenzieren sie zwischen Projekten, die einer eher deduktiven oder...

Integration von 3D-Kamerasystemen am Gabelstapler

OpenAIRE

Kleinert, Steffen; Overmeyer, Ludger

2013-01-01

Dieser Beitrag beschreibt die Integration von laufzeitmessenden 3D Kamerasystemen in die Gabelzinkenspitzen eines Flurförderzeugs. Mit Hilfe der integrierten Kameras und deren ausgewerteter Aufnahmen wurde ein Assistenzsystem für die Handhabung von Ladungsträgern realisiert, das dem Fahrer des Flurförderzeugs Verfahrempfehlungen für die Optimierung der Relativposition zwischen Gabelzinken und Ladungsträger bzw. Lagerplatz ausgibt. Neben der Vorstellung der verwendeten Kamera-Hardware und der ...

Determinants of gender-specific wages in Germany

OpenAIRE

Heinze, Anja

2009-01-01

Diese Arbeit besteht aus empirischen und methodischen Beiträgen zur Literatur über den deutschen Lohnunterschied zwischen Männern und Frauen. Bisher war es aus Mangel an geeigneten Daten nicht möglich, den potentiellen Einfluss von Arbeitgebern bzw. Firmen auf diesen Lohnunterschied zu untersuchen. Auf der Basis neuer Linked Employer-Employee Daten wird dies in drei empirischen Studien untersucht. Die erste Studie wendet sich dem innerbetrieblichen Lohnunterschied zu. Dabei zeigt sich, dass...

DEM analysis of FOXSI-2 microflare using AIA observations

Science.gov (United States)

Athiray Panchapakesan, Subramania; Glesener, Lindsay; Vievering, Juliana; Camilo Buitrago-Casas, Juan; Christe, Steven; Inglis, Andrew; Krucker, Sam; Musset, Sophie

2017-08-01

The second flight of Focusing Optics X-ray Solar Imager (FOXSI) sounding rocket experiment was successfully completed on 11 December 2014. FOXSI makes direct imaging and spectral observation of the Sun in hard X-rays using grazing incidence optics modules which focus X-rays onto seven focal plane detectors kept at a 2m distance, in the energy range 4 to 20 keV, to study particle acceleration and coronal heating. Significant HXR emissions were observed by FOXSI during microflare events with A0.5 and A2.5 class, as classified by GOES, that occurred during FOXSI-2 flight.Spectral analysis of FOXSI data for these events indicate presence of plasma at higher temperatures (>10MK). We attempt to study the plasma content in the corona at different temperatures, characterized by the differential emission measure (DEM), over the FOXSI-2 observed flare regions using the Atmospheric Imaging Assembly (SDO/AIA) data. We utilize AIA observations in different EUV filters that are sensitive to ionized iron lines, to determine the DEM by using a regularized inversion method. This poster will show the properties of hot plasma as derived from FOXSI-2 HXR spectra with supporting DEM analysis using AIA observations.

An Overview of the CapDEM Integrated Engineering Environment

National Research Council Canada - National Science Library

Lam, Sylvia; Poursina, Shiva; Spafford, Tim

2005-01-01

In order to gain a better understanding of the approach and the technology requirements to support collaborative engineering activities, the Collaborative Capability Definition, Engineering and Management (CapDEM...

DEM investigation of weathered rocks using a novel bond contact model

Directory of Open Access Journals (Sweden)

Zhenming Shi

2015-06-01

Full Text Available The distinct element method (DEM incorporated with a novel bond contact model was applied in this paper to shed light on the microscopic physical origin of macroscopic behaviors of weathered rock, and to achieve the changing laws of microscopic parameters from observed decaying properties of rocks during weathering. The changing laws of macroscopic mechanical properties of typical rocks were summarized based on the existing research achievements. Parametric simulations were then conducted to analyze the relationships between macroscopic and microscopic parameters, and to derive the changing laws of microscopic parameters for the DEM model. Equipped with the microscopic weathering laws, a series of DEM simulations of basic laboratory tests on weathered rock samples was performed in comparison with analytical solutions. The results reveal that the relationships between macroscopic and microscopic parameters of rocks against the weathering period can be successfully attained by parametric simulations. In addition, weathering has a significant impact on both stress–strain relationship and failure pattern of rocks.

A Novel DEM Approach to Simulate Block Propagation on Forested Slopes

Science.gov (United States)

Toe, David; Bourrier, Franck; Dorren, Luuk; Berger, Frédéric

2018-03-01

In order to model rockfall on forested slopes, we developed a trajectory rockfall model based on the discrete element method (DEM). This model is able to take the complex mechanical processes at work during an impact into account (large deformations, complex contact conditions) and can explicitly simulate block/soil, block/tree contacts as well as contacts between neighbouring trees. In this paper, we describe the DEM model developed and we use it to assess the protective effect of different types of forest. In addition, we compared it with a more classical rockfall simulation model. The results highlight that forests can significantly reduce rockfall hazard and that the spatial structure of coppice forests has to be taken into account in rockfall simulations in order to avoid overestimating the protective role of these forest structures against rockfall hazard. In addition, the protective role of the forests is mainly influenced by the basal area. Finally, the advantages and limitations of the DEM model were compared with classical rockfall modelling approaches.

Arthrographic differential diagnosis between ruptures of the anterior talofibular ligament, the joint capsule and the anterior tibiofibular ligament

International Nuclear Information System (INIS)

Moppes, F.I. van; Hoogenband, C.R. van den; Meijer, F.

1980-01-01

Aus einem Studium der Literatur, chirurgischen Befunden und Untersuchungen an Leichen kann es als unwahrscheinlich angesehen werden, dass bei einer Fussverstauchung vom Inversionstyp ein Riss des vorderen tibiofibularen Ligraments haeufig zusammen mit einem Gelenkkapselriss und einem seitlichen Baenderriss auftritt. Entgegen der Beobachtung anderer Verfasser fanden wir, dass ein Riss des vorderen tibiofularen Ligaments in keiner Weise aus dem Vorhandensein oder Nichtvorhandensein folgender arthrographischer Befunde geschlossen werden konnte: a) kontrastfreie Zone, b) tibiofibularer Rezessus, oder c) beide zusammen. Ein Gelenkkapselriss kann angenommen werden, wenn Kontrastmittel aus dem Gelenk in das weiche Gewebe austritt, ohne unterhalb oder seitlich in den Aussenknoechel zu dringen. Ein Austritt des Kontrastmittels unterhalb und seitlich des Aussenknoechels deutet auf einen Riss des vorderen tabofibularen Ligaments hin. Die anatomischen Zusammenhaenge zwischen Bandverbindung, Gelenkkapsel, tibiofibularem Rezessus und dem vorderen talofibularen Ligament wurden an Leichen und waehrend der chirurgischen Eingriffe studiert. Ausbreitung des Kontrastmittels im weichen Gewebe wird wahrscheinlich bestimmt durch die Anordnung und Beschaedigung der Weichteile und durch die Groesse des entstandenen Haematoms und folgt dem Weg des kleinsten Widerstandes. (orig.) [de

A coupled DEM-CFD method for impulse wave modelling

Science.gov (United States)

Zhao, Tao; Utili, Stefano; Crosta, GiovanBattista

2015-04-01

Rockslides can be characterized by a rapid evolution, up to a possible transition into a rock avalanche, which can be associated with an almost instantaneous collapse and spreading. Different examples are available in the literature, but the Vajont rockslide is quite unique for its morphological and geological characteristics, as well as for the type of evolution and the availability of long term monitoring data. This study advocates the use of a DEM-CFD framework for the modelling of the generation of hydrodynamic waves due to the impact of a rapid moving rockslide or rock-debris avalanche. 3D DEM analyses in plane strain by a coupled DEM-CFD code were performed to simulate the rockslide from its onset to the impact with still water and the subsequent wave generation (Zhao et al., 2014). The physical response predicted is in broad agreement with the available observations. The numerical results are compared to those published in the literature and especially to Crosta et al. (2014). According to our results, the maximum computed run up amounts to ca. 120 m and 170 m for the eastern and western lobe cross sections, respectively. These values are reasonably similar to those recorded during the event (i.e. ca. 130 m and 190 m respectively). In these simulations, the slope mass is considered permeable, such that the toe region of the slope can move submerged in the reservoir and the impulse water wave can also flow back into the slope mass. However, the upscaling of the grains size in the DEM model leads to an unrealistically high hydraulic conductivity of the model, such that only a small amount of water is splashed onto the northern bank of the Vajont valley. The use of high fluid viscosity and coarse grain model has shown the possibility to model more realistically both the slope and wave motions. However, more detailed slope and fluid properties, and the need for computational efficiency should be considered in future research work. This aspect has also been

Rehkitzrettung mit dem Fliegenden Wildretter: Erfahrungen der ersten Feldeinsätze

OpenAIRE

Wimmer, Tilman; Israel, Martin; Haschberger, Peter; Weimann, Anita

2013-01-01

Der Fliegende Wildretter des Deutschen Zentrums für Luft- und Raumfahrt ist als prototypische Kleinserie seit dem Jahr 2010 erfolgreich in Deutsch-land und Österreich im Einsatz, um aus der Luft Wildtiere während der Wiesenmahd aufzuspüren, und diese so vor dem Tod durch das Mähwerk zu retten. Der Prototyp basiert auf einem ferngesteuerten Multikopter, der mit mehreren Kameras ausgestattet ist und damit im Flug zuverlässiger und wesentlich schneller Wildtiere er-kennen kann, als dies mit b...

Sensitivity of Particle Size in Discrete Element Method to Particle Gas Method (DEM_PGM) Coupling in Underbody Blast Simulations

Science.gov (United States)

2016-06-12

Particle Size in Discrete Element Method to Particle Gas Method (DEM_PGM) Coupling in Underbody Blast Simulations Venkatesh Babu, Kumar Kulkarni, Sanjay...buried in soil viz., (1) coupled discrete element & particle gas methods (DEM-PGM) and (2) Arbitrary Lagrangian-Eulerian (ALE), are investigated. The...DEM_PGM and identify the limitations/strengths compared to the ALE method. Discrete Element Method (DEM) can model individual particle directly, and

VT USGS NED Hydro-flattened DEM (30 meter) - statewide

Data.gov (United States)

Vermont Center for Geographic Information — (Link to Metadata) VTHYDRODEM was created to produce a "hydrologically correct" DEM, compliant with the Vermont Hydrography Dataset (VHD) in support of the "flow...

DEM GPU studies of industrial scale particle simulations for granular flow civil engineering applications

Science.gov (United States)

Pizette, Patrick; Govender, Nicolin; Wilke, Daniel N.; Abriak, Nor-Edine

2017-06-01

The use of the Discrete Element Method (DEM) for industrial civil engineering industrial applications is currently limited due to the computational demands when large numbers of particles are considered. The graphics processing unit (GPU) with its highly parallelized hardware architecture shows potential to enable solution of civil engineering problems using discrete granular approaches. We demonstrate in this study the pratical utility of a validated GPU-enabled DEM modeling environment to simulate industrial scale granular problems. As illustration, the flow discharge of storage silos using 8 and 17 million particles is considered. DEM simulations have been performed to investigate the influence of particle size (equivalent size for the 20/40-mesh gravel) and induced shear stress for two hopper shapes. The preliminary results indicate that the shape of the hopper significantly influences the discharge rates for the same material. Specifically, this work shows that GPU-enabled DEM modeling environments can model industrial scale problems on a single portable computer within a day for 30 seconds of process time.

Simulation of TanDEM-X interferograms for urban change detection

Science.gov (United States)

Welte, Amelie; Hammer, Horst; Thiele, Antje; Hinz, Stefan

2017-10-01

Damage detection after natural disasters is one of the remote sensing tasks in which Synthetic Aperture Radar (SAR) sensors play an important role. Since SAR is an active sensor, it can record images at all times of day and in all weather conditions, making it ideally suited for this task. While with the newer generation of SAR satellites such as TerraSAR-X or COSMOSkyMed amplitude change detection has become possible even for urban areas, interferometric phase change detection has not been published widely. This is mainly because of the long revisit times of common SAR sensors leading to temporal decorrelation. This situation has changed dramatically with the advent of the TanDEM-X constellation, which can create single-pass interferograms from space at very high resolutions, avoiding temporal decorrelation almost completely. In this paper the basic structures that are present for any building in InSAR phases, i.e. layover, shadow, and roof areas, are examined. Approaches for their extraction from TanDEM-X interferograms are developed using simulated SAR interferograms. The extracted features of the building signature will in the future be used for urban change detection in real TanDEM-X High Resolution Spotlight interferograms.

Landform classification using a sub-pixel spatial attraction model to increase spatial resolution of digital elevation model (DEM

Directory of Open Access Journals (Sweden)

Marzieh Mokarrama

2018-04-01

Full Text Available The purpose of the present study is preparing a landform classification by using digital elevation model (DEM which has a high spatial resolution. To reach the mentioned aim, a sub-pixel spatial attraction model was used as a novel method for preparing DEM with a high spatial resolution in the north of Darab, Fars province, Iran. The sub-pixel attraction models convert the pixel into sub-pixels based on the neighboring pixels fraction values, which can only be attracted by a central pixel. Based on this approach, a mere maximum of eight neighboring pixels can be selected for calculating of the attraction value. In the mentioned model, other pixels are supposed to be far from the central pixel to receive any attraction. In the present study by using a sub-pixel attraction model, the spatial resolution of a DEM was increased. The design of the algorithm is accomplished by using a DEM with a spatial resolution of 30 m (the Advanced Space borne Thermal Emission and Reflection Radiometer; (ASTER and a 90 m (the Shuttle Radar Topography Mission; (SRTM. In the attraction model, scale factors of (S = 2, S = 3, and S = 4 with two neighboring methods of touching (T = 1 and quadrant (T = 2 are applied to the DEMs by using MATLAB software. The algorithm is evaluated by taking the best advantages of 487 sample points, which are measured by surveyors. The spatial attraction model with scale factor of (S = 2 gives better results compared to those scale factors which are greater than 2. Besides, the touching neighborhood method is turned to be more accurate than the quadrant method. In fact, dividing each pixel into more than two sub-pixels decreases the accuracy of the resulted DEM. On the other hand, in these cases DEM, is itself in charge of increasing the value of root-mean-square error (RMSE and shows that attraction models could not be used for S which is greater than 2. Thus considering results, the proposed model is highly capable of

Grain sedimentation with SPH-DEM and its validation

NARCIS (Netherlands)

Robinson, M.J.; Luding, Stefan; Ramaioli, Marco; Yu, A; Dong, K; Yang, R; Luding, S

2013-01-01

Our mesoscale simulation method [M. Robinson, S. Luding, and M. Ramaioli, submitted (2013)] for multiphase fluid-particle flows couples Smoothed Particle Hydrodynamics (SPH) and the Discrete Element Method (DEM) and enjoys the flexibility of meshless methods, such as being capable to handling free

Local effects of friction between car tyres and roads; Lokale Effekte der Reibung zwischen Pkw-Reifen und Fahrbahn

Energy Technology Data Exchange (ETDEWEB)

Fach, M.

2000-07-01

Local effects of friction in the contact surface of car tyres were measured and interpreted using specially developed or modified emthods of measurement. The sensors were used in test stands and in driving tests. - The results on local sliding and elastic deformations show that interaction of both components governs the friction forces between tyres and roads. Deformation slip and sliding slip occur jointly, leading to a characterstic shape of the friction-slip curve. A closed theory on the characteristics of tyre friction is presented. - Analogies are established between the local effects resulting from frictional load on the tyres and the methods of friction coeffcient analysis using the Darmstadt tyre sensors. The fundmental mechanisms are derived and presented. [German] Die Arbeit beschaeftigt sich mit der Messung und Interpretation lokaler Effekte der Reibung in der Aufstandsflaeche von Pkw-Reifen. Zur Messung dieser Effekte wurden im Rahmen der Arbeit Messmethoden geschaffen bzw. vorhandene Verfahren angepasst. Die Sensorik wurde auf Pruefstaenden und im Fahrversuch eingesetzt. - Die Ergebnisse zum lokalen Gleiten und zu den elastischen Deformationen zeigen, dass ein Zusammenspiel der beiden Komponenten fuer die Auspraegung von Reibkraeften zwischen Reifen und Strasse massgeblich ist. Es entsteht das gemeinsame Auftreten von Deformations- und Gleitschlupf am Reifen und damit das charakteristische Aussehen der Reibwert-Schlupf-Kurve. Eine geschlossene Theorie zur Charakteristik der Reifenreibung wird vorgestellt. - Daneben zeigen sich deutliche Analogien zwischen den lokalen Effekten in Folge von Reibwertbeanspruchung vom Reifen und der Verfahren zur Reibwerterkennung mit Hilfe der Darmstaedter Reifensensorik. Die grundlegenden Mechanismen dafuer werden hergeleitet. (orig.)

Investigações epidemiológicas sobre demência nos países em desenvolvimento

Directory of Open Access Journals (Sweden)

M Scazufca

2002-12-01

Full Text Available Na medida em que a população mundial está envelhecendo, a demência está se constituindo em importante problema de saúde pública, particularmente nos países em desenvolvimento. Investigações epidemiológicas nestes países são escassas e apresentam dificuldades metodológicas adicionais, principalmente no que se refere à adequação sociocultural dos instrumentos utilizados para a definição de casos. Tendo em vista estas preocupações, foi fundado o "Grupo de Pesquisa em Demência 10/66", que é constituído por uma rede internacional de pesquisadores, predominantemente de países em desenvolvimento. O nome do grupo tem como referência o paradoxo de que menos de 10% dos estudos populacionais sobre demência são dirigidos aos 2/3 ou mais de casos de pessoas com demência que vivem em países em desenvolvimento. O objetivo do artigo é atualizar informações da literatura sobre as diferenças de prevalência e incidência de demência encontradas em países desenvolvidos e em desenvolvimento.

Investigações epidemiológicas sobre demência nos países em desenvolvimento

Directory of Open Access Journals (Sweden)

Scazufca M

2002-01-01

Full Text Available Na medida em que a população mundial está envelhecendo, a demência está se constituindo em importante problema de saúde pública, particularmente nos países em desenvolvimento. Investigações epidemiológicas nestes países são escassas e apresentam dificuldades metodológicas adicionais, principalmente no que se refere à adequação sociocultural dos instrumentos utilizados para a definição de casos. Tendo em vista estas preocupações, foi fundado o "Grupo de Pesquisa em Demência 10/66", que é constituído por uma rede internacional de pesquisadores, predominantemente de países em desenvolvimento. O nome do grupo tem como referência o paradoxo de que menos de 10% dos estudos populacionais sobre demência são dirigidos aos 2/3 ou mais de casos de pessoas com demência que vivem em países em desenvolvimento. O objetivo do artigo é atualizar informações da literatura sobre as diferenças de prevalência e incidência de demência encontradas em países desenvolvidos e em desenvolvimento.

Automatic relative RPC image model bias compensation through hierarchical image matching for improving DEM quality

Science.gov (United States)

Noh, Myoung-Jong; Howat, Ian M.

2018-02-01

The quality and efficiency of automated Digital Elevation Model (DEM) extraction from stereoscopic satellite imagery is critically dependent on the accuracy of the sensor model used for co-locating pixels between stereo-pair images. In the absence of ground control or manual tie point selection, errors in the sensor models must be compensated with increased matching search-spaces, increasing both the computation time and the likelihood of spurious matches. Here we present an algorithm for automatically determining and compensating the relative bias in Rational Polynomial Coefficients (RPCs) between stereo-pairs utilizing hierarchical, sub-pixel image matching in object space. We demonstrate the algorithm using a suite of image stereo-pairs from multiple satellites over a range stereo-photogrammetrically challenging polar terrains. Besides providing a validation of the effectiveness of the algorithm for improving DEM quality, experiments with prescribed sensor model errors yield insight into the dependence of DEM characteristics and quality on relative sensor model bias. This algorithm is included in the Surface Extraction through TIN-based Search-space Minimization (SETSM) DEM extraction software package, which is the primary software used for the U.S. National Science Foundation ArcticDEM and Reference Elevation Model of Antarctica (REMA) products.

Discrete Element Modeling (DEM) of Triboelectrically Charged Particles: Revised Experiments

Science.gov (United States)

Hogue, Michael D.; Calle, Carlos I.; Curry, D. R.; Weitzman, P. S.

2008-01-01

In a previous work, the addition of basic screened Coulombic electrostatic forces to an existing commercial discrete element modeling (DEM) software was reported. Triboelectric experiments were performed to charge glass spheres rolling on inclined planes of various materials. Charge generation constants and the Q/m ratios for the test materials were calculated from the experimental data and compared to the simulation output of the DEM software. In this paper, we will discuss new values of the charge generation constants calculated from improved experimental procedures and data. Also, planned work to include dielectrophoretic, Van der Waals forces, and advanced mechanical forces into the software will be discussed.

2016 NOAA Topobathy Lidar DEM: Upper Lake Michigan Islands

Data.gov (United States)

National Oceanic and Atmospheric Administration, Department of Commerce — This digital elevation model (DEM) was created from data collected by Leading Edge Geomatics using a Leica Chiroptera II Bathymetric & Topographic Sensor. The...

Tropical-forest biomass estimation at X-Band from the spaceborne TanDEM-X interferometer

Science.gov (United States)

R. Treuhaft; F. Goncalves; J.R. dos Santos; M. Keller; M. Palace; S.N. Madsen; F. Sullivan; P.M.L.A. Graca

2014-01-01

This letter reports the sensitivity of X-band interferometric synthetic aperture radar (InSAR) data from the first dual-spacecraft radar interferometer, TanDEM-X, to variations in tropical-forest aboveground biomass (AGB). It also reports the first tropical-forest AGB estimates fromTanDEM-X data. Tropical forests account for...

AMANDA and D0 as a Test Environment for the LHC Computing Grid

Energy Technology Data Exchange (ETDEWEB)

Harenberg, Torsten [Univ. of Wuppertal (United States)

2005-08-01

Die Suche nach den Grundbausteinen der Materie und nach den Kräften, die zwischen ihnen wirken, ist das Forschungsgebiet der Hochenergiephysik. Mit immer größer werdenden Teilchenbeschleunigern erreicht man immer tiefer gehende Erkenntnisse und dringt dabei in Energiebereiche vor, wie sie kurz nach dem Urknall herrschten. Im Moment ist das Tevatron am Fermilab der energ piereichste Teilchenbeschleuniger der Welt mit einer Schwerpunktsenergie von √s = 1, 96 TeV. Um die bei diesen hohen Energien entstehende Anzahl von Teilchen zu messen, sind auch immer höher auflösende Detektoren nötig. Dem wurde dadurch Rechnung getragen, dass mit der Steigerung der Schwerpunktsenergie am Tevatron auch die Detektoren DØ und CDF1) teilweise erneuert wurden.

Use of DEMs Derived from TLS and HRSI Data for Landslide Feature Recognition

Directory of Open Access Journals (Sweden)

Maurizio Barbarella

2018-04-01

Full Text Available This paper addresses the problems arising from the use of data acquired with two different remote sensing techniques—high-resolution satellite imagery (HRSI and terrestrial laser scanning (TLS—for the extraction of digital elevation models (DEMs used in the geomorphological analysis and recognition of landslides, taking into account the uncertainties associated with DEM production. In order to obtain a georeferenced and edited point cloud, the two data sets require quite different processes, which are more complex for satellite images than for TLS data. The differences between the two processes are highlighted. The point clouds are interpolated on a DEM with a 1 m grid size using kriging. Starting from these DEMs, a number of contour, slope, and aspect maps are extracted, together with their associated uncertainty maps. Comparative analysis of selected landslide features drawn from the two data sources allows recognition and classification of hierarchical and multiscale landslide components. Taking into account the uncertainty related to the map enables areas to be located for which one data source was able to give more reliable results than another. Our case study is located in Southern Italy, in an area known for active landslides.

2015 USACE NCMP Topobathy Lidar DEM: Egmont Key (FL)

Data.gov (United States)

National Oceanic and Atmospheric Administration, Department of Commerce — These 1 m gridded bare earth Digital Elevation Model (DEM) files contain rasterized topobathy lidar elevations generated from data collected by the Coastal Zone...

High-accuracy single-pass InSAR DEM for large-scale flood hazard applications

Science.gov (United States)

Schumann, G.; Faherty, D.; Moller, D.

2017-12-01

In this study, we used a unique opportunity of the GLISTIN-A (NASA airborne mission designed to characterizing the cryosphere) track to Greenland to acquire a high-resolution InSAR DEM of a large area in the Red River of the North Basin (north of Grand Forks, ND, USA), which is a very flood-vulnerable valley, particularly in spring time due to increased soil moisture content near state of saturation and/or, typical for this region, snowmelt. Having an InSAR DEM that meets flood inundation modeling and mapping requirements comparable to LiDAR, would demonstrate great application potential of new radar technology for national agencies with an operational flood forecasting mandate and also local state governments active in flood event prediction, disaster response and mitigation. Specifically, we derived a bare-earth DEM in SAR geometry by first removing the inherent far range bias related to airborne operation, which at the more typical large-scale DEM resolution of 30 m has a sensor accuracy of plus or minus 2.5 cm. Subsequently, an intelligent classifier based on informed relationships between InSAR height, intensity and correlation was used to distinguish between bare-earth, roads or embankments, buildings and tall vegetation in order to facilitate the creation of a bare-earth DEM that would meet the requirements for accurate floodplain inundation mapping. Using state-of-the-art LiDAR terrain data, we demonstrate that capability by achieving a root mean squared error of approximately 25 cm and further illustrating its applicability to flood modeling.

2016 USACE NCMP Topobathy Lidar DEM: Gulf Coast (TX)

Data.gov (United States)

National Oceanic and Atmospheric Administration, Department of Commerce — These bare earth Digital Elevation Model (DEM) files contain rasterized topobathy lidar elevations at a 1 meter grid size, generated from data collected by the...

Optimierung von Elektrophorese- und Blottingtechnik der vWF-Multimeranalyse

OpenAIRE

Thiel, Christopher

2010-01-01

Die vWF-Multimeranalyse ist in ihrem Ablauf eine sehr komplexe, arbeitsaufwendige und störungsanfällige Methode zur Diagnostik eines VWS. So war es in der Vergangenheit schwierig, einen streng horizontalen Lauf der Plasmen während der Elektrophorese sicherzustellen. Es kam oftmals, vermutlich durch Leitfähigkeitsunterschiede, zu einem Aufstieg und Übertritt der Plasmen in den darüberliegenden Elektrodenpuffer. Ausserdem war es notwendig vor dem Blotten einen exakten Kontakt zwischen Agarosege...

Einsatzmöglichkeiten des Hüttlin Kugelcoaters HKC 05-TJ unter Einbeziehung von Simulationen

OpenAIRE

Wöstheinrich, Karin

2000-01-01

Ein Wirbelschichtgerät für den Labormassstab (Hüttlin Kugelcoater HKC 05-TJ) wird instrumentiert und mit Hilfe von Lactosegranulaten, die anschliessend tablettiert werden, validiert. Ein computergestütztes Simulationsprogramm wird entwickelt, mit dem Temperaturverläufe im Gerät während des Besprühens der Modellsubstanz Glaskugeln mit Wasser sowie das Schichtenwachstum der Glaskugeln nach Besprühen mit Lactoselösung berchnet werden. Vergleiche zwischen Modell und Experiment ergeben eine gute Ü...

Evaluierung der Zielsetzungen des vereinsbezogenen Praktikums für Sportlehramtsstudierende auf der Grundlage vereinsinterner und vereinsexterner Rahmenbedingungen : eine empirische Studie an den bayerischen Sportinstituten

OpenAIRE

Reim, Dominik

2005-01-01

Durch Kultusministerium und BLSV wurde 1997 ein Vereinspraktikum ins Leben gerufen mit dem Ziel, bei Studierenden bereits in der Ausbildungsphase eine Sensibilisierung für die Zusammenarbeit zwischen Schule und Verein zu erreichen und gleichzeitig die berufliche Eignung durch Erprobung der sportpädagogischen Begabung zu testen. Zu überprüfen galt es, ob Studierende durch das Praktikum in die Lage versetzt werden, diese beiden angestrebten Zielsetzungen zu erfüllen. Dazu war es in einem ersten...

Vergleichende Einschätzung der diagnostischen Aussagekraft der Kenngrößen freies PSA, Alpha1-Antichymotrypsin-PSA und komplexiertes PSA in der Diagnostik des Prostatakarzinoms

OpenAIRE

Baumgart E; Deger S; Jung K; Lein M; Loening SA; Schnorr D

2001-01-01

Ziel der Studie war die vergleichende Einschätzung der diagnostischen Aussagekraft von Gesamt-PSA (tPSA), freiem PSA (fPSA), alpha1-Antichymotrypsin-PSA (ACT-PSA) und komplexiertem PSA (cPSA) sowie der entsprechenden Quotienten zur Differenzierung zwischen einem Prostatakarzinom (PCa) und einer Benignen Prostatahyperplasie (BPH). Die Bestimmung erfolgte bei insgesamt 324 Männern (PCa: n = 144; BPH: n = 89; Kontrollen: n = 91). Die tPSA- und cPSA-Konzentrationen wurden mit dem Bayer Immuno 1 S...

A new DEM of the Austfonna ice cap by combining differential SAR interferometry with ICESat laser altimetry

Directory of Open Access Journals (Sweden)

Geir Moholdt

2012-05-01

Full Text Available We present a new digital elevation model (DEM of the Austfonna ice cap in the Svalbard Archipelago, Norwegian Arctic. Previous DEMs derived from synthetic aperture radar (SAR and optical shape-from-shading have been tied to airborne radio echo-sounding surface profiles from 1983 which contain an elevation-dependent bias of up to several tens of metres compared with recent elevation data. The new and freely available DEM is constructed purely from spaceborne remote sensing data using differential SAR interferometry (DInSAR in combination with ICESat laser altimetry. Interferograms were generated from pairs of SAR scenes from the one-day repeat tandem phase of the European Remote Sensing Satellites 1/2 (ERS-1/2 in 1996. ICESat elevations from winter 2006–08 were used as ground control points to refine the interferometric baseline. The resulting DEM is validated against the same ground control points and independent surface elevation profiles from Global Navigation Satellite Systems (GNSS and airborne laser altimetry, yielding root mean square (RMS errors of about 10 m in all cases. This quality is sufficient for most glaciological applications, and the new DEM will be a baseline data set for ongoing and future research at Austfonna. The technique of combining satellite DInSAR with high-resolution satellite altimetry for DEM generation might also be a good solution in other glacier regions with similar characteristics, especially when data from TanDEM-X and CryoSat-2 become available.

2015 USACE NCMP Topobathy Lidar DEM: Sand Island (WA)

Data.gov (United States)

National Oceanic and Atmospheric Administration, Department of Commerce — These Digital Elevation Model (DEM) files contain rasterized topobathy lidar elevations at a 1 m grid size, generated from data collected by the Coastal Zone Mapping...

[Thomas Lange. Zwischen Reformation und Untergang Alt-Livlands : der Rigaer Erzbischof Wilhelm von Brandenburg im Beziehungsgeflecht der livländischen Konföderation und ihrer Nachbarländer] / Juhan Kreem

Index Scriptorium Estoniae

Kreem, Juhan, 1971-

2015-01-01

Arvustus: Lange, Thomas. Zwischen Reformation und Untergang Alt-Livlands : der Rigaer Erzbischof Wilhelm von Brandenburg im Beziehungsgeflecht der livländischen Konföderation und ihrer Nachbarländer (Hamburger Beiträge zur Geschichte des östlichen Europa)

„…ich konnte viel über mein Leben lernen“ Soziologieunterricht an der Gymnasialen Oberstufe in Bremen – Eine „Parallelwelt“?

Directory of Open Access Journals (Sweden)

Marianne Papke

2009-12-01

Full Text Available "Largely unnoticed by both sociology and the German educational institutions and their discourse, Bremen has been offering both Advanced Placement and standard level sociology classes in its schools in grades 11 through 13 for the last 30 years. This paper deals mainly with the relevance of the school subject of sociology as seen by about 100 students recruited from five different classes. The students discuss the difference between the school subject sociology and other social sciences related subjects taught in school. Against this background, the emergence, development and formation of the new Bremen curriculum for sociology will be presented, concluding with a tentative inquiry into the “lack of interrelation” between school and university.In der deutschen Bildungslandschaft und in der Soziologie nahezu nicht wahrgenommen gibt es in Bremen seit 30 Jahren Soziologieleistungs- und -grundkurse in der Gymnasialen Oberstufe. Dieser Aufsatz beschäftigt sich schwerpunktmäßig mit der Bedeutung des Unterrichtsfaches Soziologie aus der Sicht von ca. 100 Schülerinnen und Schülern aus fünf Oberstufenkursen. Die Jugendlichen setzen sich mit dem Unterschied zwischen dem Fach Soziologie und anderen sozialwissenschaftlichen Fächern in der Schule auseinander. Vor diesem Hintergrund werden kurz die Entstehung und die Erarbeitung des neuen Bremer Bildungsplanes Soziologie dargestellt, um am Ende fragend auf die „Beziehungslosigkeit“ zwischen Universität und Schule hinzuweisen.

An experimentally validated DEM study of powder mixing in a paddle blade mixer

OpenAIRE

Pantaleev, Stefan; Yordanova, Slavina; Janda, Alvaro; Marigo, Michele; Ooi, Jin

2017-01-01

An investigation on the predictive capabilities of Discrete Element Method simulations of a powder mixing process in a laboratory scale paddle blade mixer is presented. The visco-elasto-plastic frictional adhesive DEM contactmodel of Thakur et al. (2014) was used to represent the cohesive behaviour of an aluminosilicate powder in which the model parameters were determined using experimental flow energy measurements from the FT4powder rheometer. DEM simulations of the mixing process using the ...

FE-DEM Analysis of the Effect of Tread Pattern on the Tractive Performance of Tires Operating on Sand

Science.gov (United States)

Nakashima, Hiroshi; Takatsu, Yuzuru; Shinone, Hisanori; Matsukawa, Hisao; Kasetani, Takahiro

Soil-tire system interaction is a fundamental and important research topic in terramechanics. We applied a 2D finite element, discrete element method (FE-DEM), using FEM for the tire and the bottom soil layer and DEM for the surface soil layer. Satisfactory performance analysis was achieved. In this study, to clarify the capabilities and limitations of the method for soil-tire interaction analysis, the tractive performance of real automobile tires with two different tread patterns—smooth and grooved—was analyzed by FE-DEM, and the numerical results compared with the experimental results obtained using an indoor traction measurement system. The analysis of tractive performance could be performed with sufficient accuracy by the proposed 2D dynamic FE-DEM. FE-DEM obtained larger drawbar pull for a tire with a grooved tread pattern, which was verified by the experimental results. Moreover, the result for the grooved tire showed almost the same gross tractive effort and similar running resistance as in experiments. However, for a tire with smooth tread pattern, the analyzed gross tractive effort and running resistance behaved differently than the experimental results, largely due to the difference in tire sinkage in FE-DEM.

Volcanic activity at Etna volcano, Sicily, Italy between June 2011 and March 2017 studied with TanDEM-X SAR interferometry

Science.gov (United States)

Kubanek, J.; Raible, B.; Westerhaus, M.; Heck, B.

2017-12-01

High-resolution and up-to-date topographic data are of high value in volcanology and can be used in a variety of applications such as volcanic flow modeling or hazard assessment. Furthermore, time-series of topographic data can provide valuable insights into the dynamics of an ongoing eruption. Differencing topographic data acquired at different times enables to derive areal coverage of lava, flow volumes, and lava extrusion rates, the most important parameters during ongoing eruptions for estimating hazard potential, yet most difficult to determine. Anyhow, topographic data acquisition and provision is a challenge. Very often, high-resolution data only exists within a small spatial extension, or the available data is already outdated when the final product is provided. This is especially true for very dynamic landscapes, such as volcanoes. The bistatic TanDEM-X radar satellite mission enables for the first time to generate up-to-date and high-resolution digital elevation models (DEMs) repeatedly using the interferometric phase. The repeated acquisition of TanDEM-X data facilitates the generation of a time-series of DEMs. Differencing DEMs generated from bistatic TanDEM-X data over time can contribute to monitor topographic changes at active volcanoes, and can help to estimate magmatic ascent rates. Here, we use the bistatic TanDEM-X data to investigate the activity of Etna volcano in Sicily, Italy. Etna's activity is characterized by lava fountains and lava flows with ash plumes from four major summit crater areas. Especially the newest crater, the New South East Crater (NSEC) that was formed in 2011 has been highly active in recent years. Over one hundred bistatic TanDEM-X data pairs were acquired between January 2011 and March 2017 in StripMap mode, covering episodes of lava fountaining and lava flow emplacement at Etna's NSEC and its surrounding area. Generating DEMs of every bistatic data pair enables us to assess areal extension of the lava flows, to

Antarctic 1 km Digital Elevation Model (DEM) from Combined ERS-1 Radar and ICESat Laser Satellite Altimetry

Data.gov (United States)

National Aeronautics and Space Administration — This data set provides a 1 km resolution Digital Elevation Model (DEM) of Antarctica. The DEM combines measurements from the European Remote Sensing Satellite-1...

Die Gralssuche als Sauftour: mittelalterliche Erzählstrukturen in Bernard Leonettis parodistischem Fantasy-Thriller "La Quête brestoise" (2007

Directory of Open Access Journals (Sweden)

Anna Isabell Wörsdörfer

2016-06-01

Full Text Available Der Artikel untersucht die narrativen Parallelen zwischen roman courtois und phantastischem Thriller anhand von Bernard Leonettis „polar arthurien“ La Quête brestoise. Dabei rückt das Hauptmotiv der (Grals-Queste in den Vordergrund, das im mittelalterlichen Roman als ritterliche aventure und im Kriminalroman als actiongeladene Suche jeweils den strukturgebenden Handlungsrahmen darstellt und aufgrund des Kontrasts zwischen der früheren Lebenswelt des Protagonisten Chevalier und dem modernen Brest zahlreiche parodistische Züge erhält. Eine wichtige Rolle in der Analyse spielt ferner die Raum-Zeit-Struktur, die mit Bachtin als wunderbare Welt, in der die Zeit des Abenteuers vorherrscht, beschrieben werden kann und demnach derjenigen des höfischen Romans ähnelt: Beim letzten Gefecht, welches auf einer Yacht ausgetragen wird, die im Inneren eine Steingrotte birgt, scheint die Zeit stillzustehen und eigenen – phantastischen – Gesetzen zu unterliegen.

Assessment of neuro-optometric rehabilitation using the Developmental Eye Movement (DEM test in adults with acquired brain injury

Directory of Open Access Journals (Sweden)

Neera Kapoor

2018-04-01

Full Text Available Purpose: This pilot study sought to determine the efficacy of using the Developmental Eye Movement (DEM test in the adult, acquired brain injury (ABI population to quantify clinically the effects of controlled, laboratory-performed, oculomotor-based vision therapy/vision rehabilitation. Methods: Nine adult subjects with mild traumatic brain injury (mTBI and five with stroke were assessed before and after an eight-week, computer-based, versional oculomotor (fixation, saccades, pursuit, and simulated reading training program (9.6 h total. The protocol incorporated a cross-over, interventional design with and without the addition of auditory feedback regarding two-dimensional eye position. The clinical outcome measure was the Developmental Eye Movement (DEM test score (ratio, errors taken before, midway, and immediately following training. Results: For the DEM ratio parameter, improvements were found in 80–89% of the subjects. For the DEM error parameter, improvements were found in 100% of the subjects. Incorporation of the auditory feedback component revealed a trend toward enhanced performance. The findings were similar for both DEM parameters, as well as for incorporation of the auditory feedback, in both diagnostic groups. Discussion: The results of the present study demonstrated considerable improvements in the DEM test scores following the oculomotor-based training, thus reflecting more time-optimal and accurate saccadic tracking after the training. The DEM test should be considered as another clinical test of global saccadic tracking performance in the ABI population. Resumen: Objetivo: Este estudio piloto trató de determinar la eficacia del uso de la prueba DEM (Developmental Eye Movement en la población adulta con daño cerebral adquirido (DCA para cuantificar clínicamente los efectos de la rehabilitación/terapia visual controlada, realizada en laboratorio, y de carácter oculomotor. Métodos: Se valoraron nueve sujetos adultos con

Radiosurgery with the gamma knife; Radiochirurgie mit dem Gamma-Knife

Energy Technology Data Exchange (ETDEWEB)

Wowra, B.; Reulen, H.J.

1996-05-10

Radiosurgery is a novel modality introduced by the neurosurgeon Lars Leksell. For the most important lesions, (arteriovenous angiomas, benign tumors in the base of the skull, formation of metastases in the brain), radiosurgery is a valuable additional tool in the range of therapies available to the benefit of patients. The gamma knife has been gaining a leading rank in the range of therapies applied in Germany. (orig.) [Deutsch] Radiochirurgie ist ein neues, von dem Neurochirurgen Lars Leksell konzipiertes Prinzip. Bei den wichtigsten Indikationen (arteriovenoese Angiome, gutartige Tumoren der Schaedelbasis, Hirnmetastasen etc.) bereichert und ergaenzt die Radiochirurgie das therapeutische Arsenal der Neurochirurgie zum Vorteil der Patienten betraechtlich. Dem Gamma-Knife kommt jetzt auch in Deutschland ein prominenter Platz unter den verschiedenen radiochirurgischen Verfahren zu. (orig.)

Assessment of neuro-optometric rehabilitation using the Developmental Eye Movement (DEM) test in adults with acquired brain injury.

Science.gov (United States)

Kapoor, Neera; Ciuffreda, Kenneth Joseph

This pilot study sought to determine the efficacy of using the Developmental Eye Movement (DEM) test in the adult, acquired brain injury (ABI) population to quantify clinically the effects of controlled, laboratory-performed, oculomotor-based vision therapy/vision rehabilitation. Nine adult subjects with mild traumatic brain injury (mTBI) and five with stroke were assessed before and after an eight-week, computer-based, versional oculomotor (fixation, saccades, pursuit, and simulated reading) training program (9.6h total). The protocol incorporated a cross-over, interventional design with and without the addition of auditory feedback regarding two-dimensional eye position. The clinical outcome measure was the Developmental Eye Movement (DEM) test score (ratio, errors) taken before, midway, and immediately following training. For the DEM ratio parameter, improvements were found in 80-89% of the subjects. For the DEM error parameter, improvements were found in 100% of the subjects. Incorporation of the auditory feedback component revealed a trend toward enhanced performance. The findings were similar for both DEM parameters, as well as for incorporation of the auditory feedback, in both diagnostic groups. The results of the present study demonstrated considerable improvements in the DEM test scores following the oculomotor-based training, thus reflecting more time-optimal and accurate saccadic tracking after the training. The DEM test should be considered as another clinical test of global saccadic tracking performance in the ABI population. Copyright © 2017 Spanish General Council of Optometry. All rights reserved.

Digital Elevation Models (DEMs) for the main 8 Hawaiian Islands

Data.gov (United States)

National Oceanic and Atmospheric Administration, Department of Commerce — Digital elevation model (DEM) data are arrays of regularly spaced elevation values referenced horizontally either to a Universal Transverse Mercator (UTM) projection...

Illuc erant leones: paleokomparatyvistinės idėjos apie Žemaitijos bei žemaičių vardą Vakarų Europoje

Directory of Open Access Journals (Sweden)

Pietro Umberto Dini

2011-11-01

Full Text Available Ideen über land und bewohner žemaitens aus der paläokomparativismus-zeitZusammenfassungDie traditionelle Erklärung des Namens Žemaitens (vgl. žemas ist wahrscheinlich die älteste (ob­wohl nicht die einzige, vgl. žemė Etymologie der litauischen Sprache. Sie war schon in einem Brief Vytautas des Großen aus dem 15. Jh. belegt. Seit dieser Zeit ist diese Erklärung des Toponyms sowohl in Litauen als auch anderswo in Osteuropa weit verbreitet. Erst später (vgl. das vielmals ausgegebene und übersetzte Werk Abraham Ortelius, Teatri Orbis Terrarum, 1570 wurde sie gleichfalls in westeuropäi­schen Umlauf gesetzt. Da noch lange Zeit Žemaiten in Westeuropa terra incognita blieb, ist es weiterhin interessant die ersten Erwähnungen des Toponyms und des Etnonyms in Westeuropa zu untersuchen. In der Epoche des linguistischen Paläokomparativismus der Renaissance-Zeit (15. -16. Jh. gab es in West­europa auch eine andere Meinung über die eigentlichen Einwohner Žemaitens. Nach Auffassung von Aeneas Sylvius Piccolomini wurden die Maʃʃagetae gerade zwischen Livonien und Preußen in den Wer­ken mehrerer Autoren (z.B. Volaterranus, Hartmann Schedel, Johann Cochlaeus gesetzt. Eine kritische Stellung gegen diese Meinung nahmen damals nur einzelne andere Autoren (wie z. B. Jan Stobnica, Albert Krantz ein. In dem Beitrag wird untersucht 1 wie und vor allem mit welchen Argumenten über dieses Thema während des ganzen Jahrhunderts diskutiert wurde; 2 auf welche Art und Weise eine Verwechslung zwischen Samagetae und Maʃʃagetae entstehen konnte. Zu dem letzten Punkt werden zwei nicht alternative, sondern sich integrierende Hypothesen vorgeschlagen, und zwar mittels: a einer Volksetymologie, b einer obscura per obscuriora explicalio. Es wird endlich gezeigt, wie eine solche Unklarheit bei dem Namen der Žemaiten auch bei anderen Autoren der Renaissance-Zeit (wie z. B. Angelo Rocca zu unerwarteten Verwechslungen führte (vgl. Samaritanorum lingua.

Von der Vielfalt einer Institution

OpenAIRE

Kabaum, Marcel; Buck, Marc Fabian

2013-01-01

Von der Vielfalt von Universitäten bzw. higher education institutions (HEIs) zu sprechen heißt, sich dem Dickicht an Komplexität zu stellen, das sich zwischen ihren Ideen und Realitäten ausbreitet. Der Text führt in den Sammelband "Ideen und Realitäten von Universitäten" ein und hebt die verschiedenen disziplinären Sichtweisen sowie die internationale Breite - Deutschland, Südamerika, USA, Afghanistan und China - der Beiträge hervor. (DIPF/Orig.)

Haftung des "Director" einer englischen "Limited" gemäß § 64 GmbHG

DEFF Research Database (Denmark)

Ringe, Georg

2016-01-01

Für die Frage, ob und inwiefern auf EU-Auslandsgesellschaften inländisches Insolvenz- bzw. Gläubigerschutzrecht angewandt werden kann, differenziert der EuGH in seiner Entscheidung zwischen Vorschriften, die die Gründung der Gesellschaft und solchen, welche die spätere Tätigkeit betreffen. Wolf-G......-Georg Ringe (JZ 2016, 573) untersucht die Konsequenzen einer solchen Differenzierung und widerspricht dem Ergebnis des EuGH, der zur Anwendung des (insolvenzrechtlich qualifizierten) § 64 GmbHG im Fall einer englischen Limited kommt....

Coordinating Filtering Strategies in Cooperative Agent Communities

OpenAIRE

Milosevic, Dragan

2006-01-01

Eine Folge der gegenwärtigen Informationsflut ist, dass die Benutzer die gewünschten Informationen in verschiedenen Quellen suchen müssen. Sie haben dabei große Schwierigkeiten ihr Informationsbedürfnis formal zu beschreiben. Folglich führen selten manuell erstellte Anfragen an ein Suchsystem zu befriedigenden Ergebnissen. Ein kritischer Faktor bei der Suche nach gewünschten Informationen ist die Antwortzeit des Systems, d.h. die Zeitspanne zwischen dem Absenden einer Suchanfrage und der Präs...

Evaluation of TanDEMx and SRTM DEM on watershed simulated ...

Indian Academy of Sciences (India)

57

**Department of Environmental and Water Resource Engineering. School of Civil .... Few studies have investigated the impact of DEM on watershed delineation like ..... on Integrating GIS and Environmental Modelling, Santa Fe, New. Mexico.

Original Product Resolution (OPR) Source Digital Elevation Models (DEMs) - USGS National Map 3DEP Downloadable Data Collection

Data.gov (United States)

U.S. Geological Survey, Department of the Interior — This data collection is the Original Product Resolution (OPR) Digital Elevation Model (DEM) as provided to the USGS. This DEM is delivered in the original...

Arbeit und Liebe: Wie die soziale Organisation der Geschlechterverhältnisse in beiden Bereichen zu Machtunterschieden zwischen Frauen und Männern führt

OpenAIRE

Kupfer, Antonia

2017-01-01

"Gegenstand dieses Beitrags ist die soziale Organisation der Geschlechterverhältnisse als Hierarchie zwischen Männern und Frauen vorwiegend in westlichen Ländern. Auf der Grundlage eines dualisierenden Denkmodells werden Frauen von Männern instrumentalisiert, ausgegrenzt und diskriminiert. Im Bereich der Arbeit manifestiert sich das in einer geschlechtsspezifischen Arbeitsteilung, der Vergeschlechtlichung von Tätigkeiten und Berufen, einer gläsernen Decke für Frauen in höheren Erwerbsposition...

Uncertainty modelling and analysis of volume calculations based on a regular grid digital elevation model (DEM)

Science.gov (United States)

Li, Chang; Wang, Qing; Shi, Wenzhong; Zhao, Sisi

2018-05-01

The accuracy of earthwork calculations that compute terrain volume is critical to digital terrain analysis (DTA). The uncertainties in volume calculations (VCs) based on a DEM are primarily related to three factors: 1) model error (ME), which is caused by an adopted algorithm for a VC model, 2) discrete error (DE), which is usually caused by DEM resolution and terrain complexity, and 3) propagation error (PE), which is caused by the variables' error. Based on these factors, the uncertainty modelling and analysis of VCs based on a regular grid DEM are investigated in this paper. Especially, how to quantify the uncertainty of VCs is proposed by a confidence interval based on truncation error (TE). In the experiments, the trapezoidal double rule (TDR) and Simpson's double rule (SDR) were used to calculate volume, where the TE is the major ME, and six simulated regular grid DEMs with different terrain complexity and resolution (i.e. DE) were generated by a Gauss synthetic surface to easily obtain the theoretical true value and eliminate the interference of data errors. For PE, Monte-Carlo simulation techniques and spatial autocorrelation were used to represent DEM uncertainty. This study can enrich uncertainty modelling and analysis-related theories of geographic information science.

Greenland 5 km DEM, Ice Thickness, and Bedrock Elevation Grids

Data.gov (United States)

National Aeronautics and Space Administration — A Digital Elevation Model (DEM), ice thickness grid, and bedrock elevation grid of Greenland acquired as part of the PARCA program are available in ASCII text format...

Effects of oxygen on the re-injection characteristics of thermal water with high salinity and a high iron content; Zum Einfluss von Sauerstoff auf das Reinjektionsverhalten hochsalinarer, eisenhaltiger Thermalwaesser

Energy Technology Data Exchange (ETDEWEB)

Martin, M.; Koeckritz, V. [TU BA Freiberg (Germany). Inst. fuer Bohrtechnnik und Fluidbergbau; Seibt, A. [GeoForschungsZentrum PB 4.4, Neubrandenburg (Germany)

1998-12-31

For reasons of environmental protection and in order to maintain a constant pressure level, hydrogeothermal water must be re-injected into the reservoir after use. However, human interception in the natural fluid/rock system will change the thermodynamic parameters and also the pH and redox potential. This may cause interactions between bedrock, underground water, and the re-injected fluid and have negatives effects on injectivity. Research is going on in this field on the basis of the experience gained in geothermal heating stations in north eastern Germany. (orig.) [Deutsch] Bei einer energetischen und/oder stofflichen Nutzung hydrogeothermaler Ressourcen muessen die Waesser aus Gruenden des Umweltschutzes und der Druckerhaltung im Speicher wieder in das Reservoir verbracht werden. Durch den Eingriff in das natuerliche System Fluid/Gestein werden nicht nur thermodynamische Zustandsgroessen veraendert, sondern es sind auch pH- und Redoxpotentialaenderungen z.B. durch Gasentloesungen zu erwarten. Dies kann beim Reinjizieren zu Wechselwirkungen zwischen dem Speichergestein, dem Schichtwasser und dem injizierten Fluid fuehren, was negative Auswirkungen auf die Injektivitaetsentwicklung haben kann. Eine geeignete Methode zur Aufklaerung von Einzeleffekten und zur Abschaetzung von chemischen Wechselwirkungen stellen Kerndurchstroemungsversuche dar. Ausgangspunkt der Untersuchungen sind die Erfahrungen aus dem Betrieb Geothermischer Heizzentralen Nordostdeutschlands. (orig.)

Dolmetscher/inneneinsatz in der qualitativen Sozialforschung. Zu Anforderungen und Auswirkungen in gedolmetschten Interviews

Directory of Open Access Journals (Sweden)

Gwendolin Lauterbach

2014-03-01

Full Text Available Der Einsatz von Dolmetscher/innen in der qualitativen Sozialforschung, insbesondere in qualitativen Interviews, stand bisher nicht im Mittelpunkt der Forschung, stellt jedoch die Interviewteilnehmer/innen vor Herausforderungen. Diese betreffen v.a. den Umgang mit dem Dolmetscher/der Dolmetscherin und deren Rolle sowie die Interviewauswertung und die Qualität der Daten und folgenden wissenschaftlichen Erkenntnisse. Aus der bisherigen Diskussion lassen sich nur bedingt methodische Leitlinien aus anderen, verwandten Bereichen ableiten. Anhand von Expert/inneninterviews mit Forscher/innen und Dolmetscher/innen werden daher Erfahrungen mit dem Dolmetscher/inneneinsatz in der qualitativen Sozialforschung dokumentiert und Handlungsempfehlungen abgeleitet. Mithilfe von Gesprächsaufzeichnungen gedolmetschter Interviews werden die Aushandlungen zwischen Originalen und Dolmetschungen aufgezeigt sowie Auswirkungen des Dolmetscher/inneneinsatzes auf den Interviewprozess dargelegt. URN: http://nbn-resolving.de/urn:nbn:de:0114-fqs140250

Die Struktur von schlankem Materialfluss mit Lean Production Kanban und Innovationen

Science.gov (United States)

Scheid, Wolf-Michael

In der Literatur wird Materialfluss überwiegend in Spezialdisziplinen betrachtet, etwa der Steuerungslogik, der Logistiktechnik oder dem Supply Chain Management. Ein charakterisierendes Merkmal des Materialflusses ist jedoch, dass er sich aus vielfältigen Einzelbausteinen zusammensetzt, die alle harmonisch abgestimmt sein müssen. Die maximal erreichbare Effizienz wird nicht durch Höchstleistungen in dem einen oder anderen Spezialthema bestimmt, sondern durch das schwächste Glied im gesamten komplexen Netzwerk. Den Schnittstellen zwischen den betroffenen Fachbereichen in einem Unternehmen kommt hier eine ganz besondere Bedeutung zu: Erst ein harmonischer Einklang ermöglicht hohe Effektivität. Dies setzt umfassendes Verständnis für interdisziplinäre Notwendigkeiten, ein hohes Maß an Abstimmung mit den operativen Prozessen und letztlich einen einvernehmlichen Umgang und den Respekt vor den Problemstellungen des Anderen voraus.

Eine neue Tornaria aus dem Ostindischen Archipel (Tornaria Sunieri)

NARCIS (Netherlands)

Stiasny, G.

1921-01-01

Da aus dem malayischen Archipel durch die Siboga-Monographie Spengels (2) zwar eine Anzahl Enteropneusten, jedoch nur eine einzige Tornaria bekannt worden ist, war anzunehmen, dass noch andere Tornarien in diesem Gebiete nachzuweisen sein würden. Von dieser Erwartung ausgehend wandte ich mich an

Demência como fator de risco para fraturas graves em idosos

Directory of Open Access Journals (Sweden)

Carvalho Aline de Mesquita

2002-01-01

Full Text Available INTRODUÇÃO: As quedas entre pessoas idosas constituem importante problema de saúde pública devido à sua alta incidência, às complicações para a saúde e aos altos custos assistenciais. O estudo realizado visa a estimar a associação entre demência e ocorrência de quedas e fraturas entre idosos. MÉTODOS: Foi conduzido estudo caso-controle de 404 indivíduos com 60 ou mais anos de idade, da cidade do Rio de Janeiro, Brasil. Casos e controles foram pareados por idade, sexo e hospital. Os dados foram coletados por meio de entrevista estruturada com os idosos. Foram considerados portadores de quadro demencial idosos cuja pontuação no questionário BOAS fosse superior a dois. Foram obtidos odds ratios (OR ajustados por fatores potenciais de confusão, utilizando-se regressão logística condicional. RESULTADOS: As quedas distribuíram-se igualmente entre os períodos da manhã, tarde e noite, havendo uma redução em sua freqüência durante a madrugada. Acidentaram-se dentro de casa 78% dos idosos com demência, contra 55% daqueles sem essa doença. O OR não-ajustado para a associação entre demência e fratura grave foi de 2,0 (IC95%, 1,23-3,25. Após o ajuste por fatores de confusão, houve uma pequena redução dessa associação (OR=1,82, 1,03-3,23. CONCLUSÃO: Idosos com quadro demencial apresentam maior risco de caírem e ser hospitalizados por fratura do que idosos sem demência. Tal fato implica a necessidade de cuidados especiais com esses indivíduos, visando a minimizar o risco desses acidentes.

Kampf der Generationen oder Solidarität zwischen Jung und Alt? Das österreichische Pflegesystem im europäischen Vergleich

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Andrea E. Schmidt

2014-03-01

Full Text Available Die Arbeit geht der Frage nach, wie sich das österreichische System der Langzeitbetreuung älterer Menschen mit Augenmerk auf die nachhaltige Solidarität zwischen Generationen u.a. im Vergleich mit anderen europäischen Ländern gestaltet. Besonderes Augenmerk wird dabei auf Finanzierungs-, Versorgungs- und Governance-Strukturen gelegt, sowie auf den Vergleich mit anderen sozialpolitischen Bereichen (Familienleistungen, Kinderbetreuung. Österreich hat im internationalen Vergleich ein relativ großzügiges System der öffentlichen Unterstützung älterer Menschen, das stark auf Geldleistungen aufbaut. Dies gilt auch für die Langzeitbetreuung, wo eine große Anzahl pflegebedürftiger Menschen erreicht wird, diese aber pro Kopf eher wenig erhalten. Die Pflegeleistungen werden aus allgemeinen Steuermitteln sowie Kostenbeiträgen von NutzerInnen finanziert, was bedeutet, dass die Finanzierung primär über die Besteuerung von Arbeitseinkommen erfolgt. Unterschiedliche Kostenbeitrags- und Regressregelungen auf Bundesländerebene führen zudem zu großen Differenzen in der finanziellen und faktischen Verantwortung von Familien, insbesondere jüngerer Generationen, die Pflege und Betreuung pflegebedürftiger Angehöriger sicherzustellen. Es folgt, dass die Einführung vermögensbezogener „Pflegesteuern“ zu mehr Ausgewogenheit in den solidarischen Elementen des Pflegesystems beitragen könnte – nicht nur aus Generationensicht. Der flächendeckende Ausbau von Pflege- und Betreuungsdiensten und bundesweit einheitliche Regelungen zu privaten Kostenbeiträgen stellen zudem eine Voraussetzung dafür dar, dass Solidarität zwischen den Generationen unabhängig von sozialer Schicht und Wohnort beurteilt werden kann.

Micromechanics of non-active clays in saturated state and DEM modelling

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Pagano Arianna Gea

2017-01-01

Full Text Available The paper presents a conceptual micromechanical model for 1-D compression behaviour of non-active clays in saturated state. An experimental investigation was carried out on kaolin clay samples saturated with fluids of different pH and dielectric permittivity. The effect of pore fluid characteristics on one-dimensional compressibility behaviour of kaolin was investigated. A three dimensional Discrete Element Method (DEM was implemented in order to simulate the response of saturated kaolin observed during the experiments. A complex contact model was introduced, considering both the mechanical and physico-chemical microscopic interactions between clay particles. A simple analysis with spherical particles only was performed as a preliminary step in the DEM study in the elastic regime.

Coastal Digital Elevation Models (DEMs) for tsunami hazard assessment on the French coasts

Science.gov (United States)

Maspataud, Aurélie; Biscara, Laurie; Hébert, Hélène; Schmitt, Thierry; Créach, Ronan

2015-04-01

Building precise and up-to-date coastal DEMs is a prerequisite for accurate modeling and forecasting of hydrodynamic processes at local scale. Marine flooding, originating from tsunamis, storm surges or waves, is one of them. Some high resolution DEMs are being generated for multiple coast configurations (gulf, embayment, strait, estuary, harbor approaches, low-lying areas…) along French Atlantic and Channel coasts. This work is undertaken within the framework of the TANDEM project (Tsunamis in the Atlantic and the English ChaNnel: Definition of the Effects through numerical Modeling) (2014-2017). DEMs boundaries were defined considering the vicinity of French civil nuclear facilities, site effects considerations and potential tsunamigenic sources. Those were identified from available historical observations. Seamless integrated topographic and bathymetric coastal DEMs will be used by institutions taking part in the study to simulate expected wave height at regional and local scale on the French coasts, for a set of defined scenarii. The main tasks were (1) the development of a new capacity of production of DEM, (2) aiming at the release of high resolution and precision digital field models referred to vertical reference frameworks, that require (3) horizontal and vertical datum conversions (all source elevation data need to be transformed to a common datum), on the basis of (4) the building of (national and/or local) conversion grids of datum relationships based on known measurements. Challenges in coastal DEMs development deal with good practices throughout model development that can help minimizing uncertainties. This is particularly true as scattered elevation data with variable density, from multiple sources (national hydrographic services, state and local government agencies, research organizations and private engineering companies) and from many different types (paper fieldsheets to be digitized, single beam echo sounder, multibeam sonar, airborne laser

Calibration of DEM parameters on shear test experiments using Kriging method

Science.gov (United States)

Xavier, Bednarek; Sylvain, Martin; Abibatou, Ndiaye; Véronique, Peres; Olivier, Bonnefoy

2017-06-01

Calibration of powder mixing simulation using Discrete-Element-Method is still an issue. Achieving good agreement with experimental results is difficult because time-efficient use of DEM involves strong assumptions. This work presents a methodology to calibrate DEM parameters using Efficient Global Optimization (EGO) algorithm based on Kriging interpolation method. Classical shear test experiments are used as calibration experiments. The calibration is made on two parameters - Young modulus and friction coefficient. The determination of the minimal number of grains that has to be used is a critical step. Simulations of a too small amount of grains would indeed not represent the realistic behavior of powder when using huge amout of grains will be strongly time consuming. The optimization goal is the minimization of the objective function which is the distance between simulated and measured behaviors. The EGO algorithm uses the maximization of the Expected Improvement criterion to find next point that has to be simulated. This stochastic criterion handles with the two interpolations made by the Kriging method : prediction of the objective function and estimation of the error made. It is thus able to quantify the improvement in the minimization that new simulations at specified DEM parameters would lead to.

DEM Calibration Approach: design of experiment

Science.gov (United States)

Boikov, A. V.; Savelev, R. V.; Payor, V. A.

2018-05-01

The problem of DEM models calibration is considered in the article. It is proposed to divide models input parameters into those that require iterative calibration and those that are recommended to measure directly. A new method for model calibration based on the design of the experiment for iteratively calibrated parameters is proposed. The experiment is conducted using a specially designed stand. The results are processed with technical vision algorithms. Approximating functions are obtained and the error of the implemented software and hardware complex is estimated. The prospects of the obtained results are discussed.

Sterblichkeit: der paradoxe Kunstgriff des Lebens - Eine Betrachtung vor dem Hintergrund der modernen Biologie

Science.gov (United States)

Verbeek, Bernhard

Leben gibt es auf der Erde seit fast 4 Mio. Jahren, trotz allen Katastrophen. Die Idee des Lebens scheint unsterblich. Der Tod aber offenbar auch. Jedes Lebewesen ist davon bedroht, ja für Menschen und andere "höhere“ Lebewesen ist er im Lebensprogramm eingebaut - todsicher. Diese Tatsache ist alles andere als selbstverständlich. Ist sie überhaupt kompatibel mit dem Prinzip der Evolution, nach dem der am besten Angepasste überlebt?

Kollektivismus, Individualismus und Persönlichkeit als Prädiktoren von Einstellungen gegenüber psychologischer Beratung - Ein Kulturvergleich zwischen deutschen und chinesischen Studierenden

OpenAIRE

Schmahl, Anne

2007-01-01

Die vorliegende Diplomarbeit beschäftigt sich mit einem Kulturvergleich zwischen deutschen (n=103) und chinesischen Studierenden (n=98) bezüglich ihrer Einstellungen gegenüber psychologischer Beratung. Als Prädiktoren der Einstellungen wurden hierbei zum einen die kulturelle Dimension Individualismus-Kollektivismus nach Hofstede (2005) und zum anderen das Fünf-Faktoren-Modell der Persönlichkeit (FFM) herangezogen. Der Einfluss der Persönlichkeit auf die Einstellungen gegenüber psychologischer...

Ein Versuch, Naturverhältnisse aus feministischer Sicht zu interpretieren

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Helga Purgand

2002-07-01

Full Text Available Mit dem vorliegenden Sammelband Geschlechterverhältnisse – Naturverhältnisse wird nach dem innovativen Beitrag der feministischen Debatte für umweltsoziologisches Denken gefragt und nach Überschneidungen, Grenzen und Zwischenräumen zwischen „Geschlecht“ und „Natur“ gesucht. In ihm wird der lobenswerte Versuch unternommen, einen Zusammenhang zwischen Geschlechter- und Naturverhältnissen herzustellen „die in der Umweltsoziologie bislang stark vernachlässigte feministische Diskussion und Geschlechterforschung einzubeziehen und als genderbezogene Perspektive zu etablieren“. (S. 9 Das Buch enthält Beiträge von 15 Autorinnen, die unterschiedliche Natur- und Geschlechtsverhältnisse facettenreich, überwiegend kreativ und theoretisch anspruchsvoll betrachten. Das Buch enthält Zugänge aus der allgemeinen Soziologie, den Sprach- und Kulturwissenschaften, aus politik- und naturwissenschaftlichen Zusammenhängen. Den ausdrücklich formulierten Anspruch, von multi- zu einer inter-disziplinären Durchdringung zu gelangen, erfüllt es nur in Ansätzen (besonders mit der Einleitung und den theoretischen Problemexplikationen. Das zustande gekommene „Nach-, Zusammen- und Querdenken“ über Begriffe, Theorien und neuere Forschungsansätze (von Foucault über Butler bis zu Donna Haraway belegt die Notwendigkeit, die naturwissenschaftlichen Annahmen „immanent zu dekonstruieren“. Sehr aufschlussreich sind in diesem Zusammenhang die Beiträge von Irmgard Schultz, Elvira Scheich, aber auch von Mary Mellor und besonders von Paula-Irene Villa, die interessante und kreative Gedanken zur Klärung des Verhältnisses von Natur, Kultur und Geschlecht anbieten. Deutlich wurde, dass weiterhin ein kontroverses Ringen um angemessene konzeptionelle Fassungen von Geschlechts- und Naturverhältnissen und die Integration von Gender als zentraler analytischer Querschnitts-Kategorie nötig sind. Insgesamt ist dem Buch ist eine schnelle Verbreitung und

Flouting the Law: Vigilante Justice and Regional Autonomy on the Indonesian Border

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Michael Eilenberg

2011-01-01

Full Text Available After the Asian Economic Crisis in 1997 and the fall of president Suharto’s authoritarian regime in 1998, rural and urban Indonesia experienced a surge in vigilante killings and the rise of non-state forms of authorities working within the twilight of legality and illegality, assuming the role of the state. Institutional uncertainty, large-scale decentralisation reforms and the deterioration of formal legal authority in post-New Order Indonesia encouraged these processes. This apparent ‘lawlessness’ became especially evident along the fringes of the Indonesian state where state authority has continuously been contested and in a state of fl ux. This paper argues that observing these processes of lawlessness and vigilantism from the borderlands provides us with an exceptional window to understand the ambiguous relationship between law and order in post-New Order Indonesia. ----- Nach der Asienkrise 1997 und dem Sturz des autoritären Regimes Präsident Suhartos 1998 waren sowohl in den ländlichen Regionen Indonesiens als auch in den Städten eine Zunahme an Bürgerwehrmorden und ein Anwachsen nicht-staatlicher Behörden zu beobachten. Zwischen Legalität und Illegalität übernahmen sie vielfach die Rolle des Staates. Institutionelle Unsicherheiten, groß angelegte Dezentralisierungsreformen und die Verschlechterung der formellen Rechtssprechung förderten nach dem Ende der „Neuen Ordnung“ diese Prozesse. Diese scheinbare Gesetzlosigkeit wurde besonders in den Grenzregionen des indonesischen Staates deutlich, wo die staatliche Autorität permanent in Frage gestellt wird und umstritten bleibt. In diesem Artikel argumentiere ich, dass die Beobachtung dieser „Gesetzlosigkeit“ und Selbstjustiz in Grenzregionen eine außergewöhnliche Möglichkeit bietet, die mehrdeutige Beziehung zwischen Recht und Ordnung in Indonesien nach dem Ende der „Neuen Ordnung“ zu verstehen.

Rockslide and Impulse Wave Modelling in the Vajont Reservoir by DEM-CFD Analyses

Science.gov (United States)

Zhao, T.; Utili, S.; Crosta, G. B.

2016-06-01

This paper investigates the generation of hydrodynamic water waves due to rockslides plunging into a water reservoir. Quasi-3D DEM analyses in plane strain by a coupled DEM-CFD code are adopted to simulate the rockslide from its onset to the impact with the still water and the subsequent generation of the wave. The employed numerical tools and upscaling of hydraulic properties allow predicting a physical response in broad agreement with the observations notwithstanding the assumptions and characteristics of the adopted methods. The results obtained by the DEM-CFD coupled approach are compared to those published in the literature and those presented by Crosta et al. (Landslide spreading, impulse waves and modelling of the Vajont rockslide. Rock mechanics, 2014) in a companion paper obtained through an ALE-FEM method. Analyses performed along two cross sections are representative of the limit conditions of the eastern and western slope sectors. The max rockslide average velocity and the water wave velocity reach ca. 22 and 20 m/s, respectively. The maximum computed run up amounts to ca. 120 and 170 m for the eastern and western lobe cross sections, respectively. These values are reasonably similar to those recorded during the event (i.e. ca. 130 and 190 m, respectively). Therefore, the overall study lays out a possible DEM-CFD framework for the modelling of the generation of the hydrodynamic wave due to the impact of a rapid moving rockslide or rock-debris avalanche.

Uma revisão bibliográfica das principais demências que acometem a população brasileira

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Claudia Lysia de O. Araújo

2011-01-01

Full Text Available Demência pode ser definida como uma síndrome caracterizada pelo declínio progressivo e global de memória e outras funções cognitivas. O presente trabalho é uma revisão bibliográfica que tem como objetivo identificar e apresentar a produção científica relacionada com a temática. O levantamento bibliográfico foi nas Bases de Dados da Biblioteca Virtual de Saúde - BIREME. Os tipos de demência aqui levadas em conta são: Demência de Alzheimer, Demência por Corpos de Lewy (DCL, Demência Frontotemporal (DFT e Demência Vascular. Nas demências, os fatores de risco variam de acordo com os estressores genéticos e ambientais, além da idade e histórico clínico, conforme cada indivíduo. As principais alterações cerebrais são: placas senis e emaranhados neurofibrilares, com comprometimento da neurotransmissão colinérgica e atrofia cerebral extensa. Na sua maior parte são patologias de início insidioso e deterioração progressiva. O primeiro sinal/sintoma é a perda da memória seguida de declínio cognitivo e funcional. Podem ser divididas em estágios conforme o acometimento. O diagnóstico é realizado por meio de história clínica, exames laboratoriais e de neuroimagem, exame clínico neurológico e exames neuropsicológicos. Conclui-se que ainda não se tem a cura das demências e que os estudos de células-tronco podem contribuir nesse sentido.

Extraction and Validation of Geomorphological Features from EU-DEM in The Vicinity of the Mygdonia Basin, Northern Greece

Science.gov (United States)

Mouratidis, Antonios; Karadimou, Georgia; Ampatzidis, Dimitrios

2017-12-01

The European Union Digital Elevation Model (EU-DEM) is a relatively new, hybrid elevation product, principally based on SRTM DEM and ASTER GDEM data, but also on publically available Russian topographic maps for regions north of 60° N. More specifically, EU-DEM is a Digital Surface Model (DSM) over Europe from the Global Monitoring for Environment and Security (GMES) Reference Data Access (RDA) project - a realisation of the Copernicus (former GMES) programme, managed by the European Commission/DG Enterprise and Industry. Even if EU-DEM is indeed more reliable in terms of elevation accuracy than its constituents, it ought to be noted that it is not representative of the original elevation measurements, but is rather a secondary (mathematical) product. Therefore, for specific applications, such as those of geomorphological interest, artefacts may be induced. To this end, the purpose of this paper is to investigate the performance of EU-DEM for geomorphological applications and compare it against other available datasets, i.e. topographic maps and (almost) global DEMs such as SRTM, ASTER-GDEM and WorldDEM™. This initial investigation is carried out in Central Macedonia, Northern Greece, in the vicinity of the Mygdonia basin, which corresponds to an area of particular interest for several geoscience applications. This area has also been serving as a test site for the systematic validation of DEMs for more than a decade. Consequently, extensive elevation datasets and experience have been accumulated over the years, rendering the evaluation of new elevation products a coherent and useful exercise on a local to regional scale. In this context, relief classification, drainage basin delineation, slope and slope aspect, as well as extraction and classification of drainage network are performed and validated among the aforementioned elevation sources. The achieved results focus on qualitative and quantitative aspects of automatic geomorphological feature extraction from

An Optimal DEM Reconstruction Method for Linear Array Synthetic Aperture Radar Based on Variational Model

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Shi Jun

2015-02-01

Full Text Available Downward-looking Linear Array Synthetic Aperture Radar (LASAR has many potential applications in the topographic mapping, disaster monitoring and reconnaissance applications, especially in the mountainous area. However, limited by the sizes of platforms, its resolution in the linear array direction is always far lower than those in the range and azimuth directions. This disadvantage leads to the blurring of Three-Dimensional (3D images in the linear array direction, and restricts the application of LASAR. To date, the research on 3D SAR image enhancement has focused on the sparse recovery technique. In this case, the one-to-one mapping of Digital Elevation Model (DEM brakes down. To overcome this, an optimal DEM reconstruction method for LASAR based on the variational model is discussed in an effort to optimize the DEM and the associated scattering coefficient map, and to minimize the Mean Square Error (MSE. Using simulation experiments, it is found that the variational model is more suitable for DEM enhancement applications to all kinds of terrains compared with the Orthogonal Matching Pursuit (OMPand Least Absolute Shrinkage and Selection Operator (LASSO methods.

DEM Development from Ground-Based LiDAR Data: A Method to Remove Non-Surface Objects

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Maneesh Sharma

2010-11-01

Full Text Available Topography and land cover characteristics can have significant effects on infiltration, runoff, and erosion processes on watersheds. The ability to model the timing and routing of surface water and erosion is affected by the resolution of the digital elevation model (DEM. High resolution ground-based Light Detecting and Ranging (LiDAR technology can be used to collect detailed topographic and land cover characteristic data. In this study, a method was developed to remove vegetation from ground-based LiDAR data to create high resolution DEMs. Research was conducted on intensively studied rainfall–runoff plots on the USDA-ARS Walnut Gulch Experimental Watershed in Southeast Arizona. LiDAR data were used to generate 1 cm resolution digital surface models (DSM for 5 plots. DSMs created directly from LiDAR data contain non-surface objects such as vegetation cover. A vegetation removal method was developed which used a slope threshold and a focal mean filter method to remove vegetation and create bare earth DEMs. The method was validated on a synthetic plot, where rocks and vegetation were added incrementally. Results of the validation showed a vertical error of ±7.5 mm in the final DEM.

"Bildung für nachhaltige Entwicklung" - die Sicht der Kinder : Ergebnisse aus dem weltweiten OMEP-Projekt

OpenAIRE

Engdahl, Ingrid

2017-01-01

Während der UNESCO Dekade „Bildung für nachhaltige Entwicklung“ (BNE) führte die Weltorganisation für Frühe Bildung (OMEP) zwischen 2009-2014 ein umfangreiches Projekt zum Thema Nachhaltigkeit durch. Das übergeordnete Ziel des Projektes war das Bewußtsein der OMEP Mitglieder und der internationalen Fachgemeinde für die Bildung für nachhaltige Entwicklung (BNE) zu stärken. Dabei wurde ein besonderer Fokus auf die kindorientierte Perspektive gelegt.

Grundlagen der Nachrichtenübertragung

Science.gov (United States)

Plaßmann, Wilfried

Die Nachrichtentechnik hat die Aufgabe, Nachrichten auszutauschen. Nachrichten sind z. B. Fragen, Beobachtungen und Befehle. Unter dem Begriff Nachrichtenübertragung wird hier die elektrische Nachrichtenübertragung verstanden, denn zur Übermittlung von Nachrichten werden Spannungen und Ströme sowie elektrische und magnetische Felder eingesetzt. Die Übertragung beginnt mit der Nachrichtenquelle, die die Nachrichten aussendet, und endet mit der Nachrichtensenke, die sie empfängt. Zwischen beiden liegt das elektrische Nachrichtenübertragungssystem, dessen Funktionseinheiten dargestellt sind und erläutert werden.

Architektur als Vermittlung

OpenAIRE

Ott, Konrad

2016-01-01

Mit Anbruch der Moderne hat sich die Architektur bewußt von den Stilen vorangegangener Epochen losgesagt und sich fortan als Ausdruck einer neuen Kultur, eines neuen Zeitgeistes legitimiert. Der Philosoph Konrad Ott setzt sich mit dem Spannungsfeld zwischen den humanistischen und ästhetischen Ansprüchen der modernen Architektur, wie sie etwa von LeCorbusier formuliert worden sind, und der Realität, die sich etwa in der "Behältnis-Architektur" der Großstädte zeigt, auseinander. Die kritische T...

e-commerce as a tool in wholesale energy trading in Europe; eCommerce im europaeischen Energiegrosshandel

Energy Technology Data Exchange (ETDEWEB)

Herrmann, M. [Andersen Consulting, Frankfurt am Main (Germany). Bereiche Energiehandel und Risikomanagement; Judisch, S.; Pieper, T. [RWE Energy Trading Ltd., Essen (Germany); Mohnhaupt, M. [Andersen Consulting Unternehmensberatung GmbH, Hamburg (Germany). Bereiche Industrieentwicklung und Geschaeftsstrategien fuer Energie- und Versorgungsunternehmen

2000-10-01

The article discusses why and how novel e-commerce trading channels based on the world wide web, emerging in addition to the OTC market and the exchange trading, will induce a significant change in energy trading. The value adding effects for market participants using the novel trading channels are explained. (orig./CB) [German] Zwischen den klassischen bilateralen Kanaelen und dem Boersensegment werden sich neue Kanaele etablieren, die einen gravierenden Wandel im Energiegrosshandel verursachen. Der zusaetzliche Wert fuer die Teilnehmer an diesen neuen Handelskanaelen wird charakterisiert. (orig./CB)

Foucault und das Recht: Besprechung von: Christian Schauer, Aufforderung zum Spiel. Foucault und das Recht, Böhlau (Weimar, Köln, Wien 2006, 383 Seiten.

Directory of Open Access Journals (Sweden)

Thomas Biebricher

2007-04-01

Full Text Available Der Autor rekonstruiert Foucaults Werk zwischen den Jahren 1961 und 1975 und integriert hierbei Perspektiven anderer Autoren (Derrida, Luhmann und Nietzsche, welche zu verwandten Themenkreisen arbeiten und/oder Foucaults Herangehensweise geprägt haben. Eigentliches Ziel der Arbeit ist es, Foucaults Beitrag zur Rechtsgeschichte und –soziologie zu beleuchten. Diese Thematik ist im deutschen Sprachraum bis jetzt kaum systematisch untersucht worden, und dementsprechend gebührt Schauers Studie besondere Beachtung. Der Autor betont Foucaults Ausführungen zum Verhältnis zwischen Recht und Psychiatrie. Dessen Diagnose hebt die “Kolonisierung” des Rechts durch forensisch psychiatrische Diskurse hervor, und Schauer gelingt es, die problematische Dimension dieser Tendenz mit Hinweis auf die schweizerische Rechtspraxis plausibel zu machen. Fluchtpunkt dieser Entwicklung wäre ein bis zum Extrem “vorbeugendes” Recht, das Gefahrenprävention und Risikoregulierung durch präemptive Verhaltensregulierung den Vorzug vor dem Legalitätsprinzip gewährt.

Resource Management in Diffserv On DemAnd (RODA) PHR

NARCIS (Netherlands)

Westberg, L.; Jacobsson, M.; de Kogel, M.; Oosthoek, S.; Partain, D.; Rexhepi, V.; Wallentin, P.; Karagiannis, Georgios

The purpose of this draft is to present the Resource Management in Diffserv (RMD) On DemAnd (RODA) Per Hop Reservation (PHR) protocol. The RODA PHR protocol is used on a per-hop basis in a Differentiated Services (Diffserv) domain and extends the Diffserv Per Hop Behavior (PHB) with resource

Doppler Centroid Estimation for Airborne SAR Supported by POS and DEM

Directory of Open Access Journals (Sweden)

CHENG Chunquan

2015-05-01

Full Text Available It is difficult to estimate the Doppler frequency and modulating rate for airborne SAR by using traditional vector method due to instable flight and complex terrain. In this paper, it is qualitatively analyzed that the impacts of POS, DEM and their errors on airborne SAR Doppler parameters. Then an innovative vector method is presented based on the range-coplanarity equation to estimate the Doppler centroid taking the POS and DEM as auxiliary data. The effectiveness of the proposed method is validated and analyzed via the simulation experiments. The theoretical analysis and experimental results show that the method can be used to estimate the Doppler centroid with high accuracy even in the cases of high relief, instable flight, and large squint SAR.

BOREAS HYP-8 DEM Data Over The NSA-MSA and SSA-MSA in The AEAC Projection

Science.gov (United States)

Knapp, David E.; Hall, Forrest G. (Editor); Wang, Xue-Wen; Band, L. E.; Smith, David E. (Technical Monitor)

2000-01-01

These data were derived from the original Digital Elevation Models (DEMs) produced by the Boreal Ecosystem-Atmosphere Study (BOREAS) Hydrology (HYD)-8 team. The original DEMs were in the Universal Transverse Mercator (UTM) projection, while this product is projected in the Albers Equal-Area Conic (AEAC) projection. The pixel size of the data is 100 meters, which is appropriate for the 1:50,000-scale contours from which the DEMs were made. The original data were compiled from information available in the 1970s and 1980s. This data set covers the two Modeling Sub-Areas (MSAs) that are contained within the Southern Study Area (SSA) and the Northern Study Area (NSA). The data are stored in binary, image format files. The DEM data over the NSA-MSA and SSA-MSA in the AEAC projection are available from the Earth Observing System Data and Information System (EOSDIS) Oak Ridge National Laboratory (ORNL) Distributed Active Archive Center (DAAC). The data files are available on a CD-ROM (see document number 20010000884).

A new 100-m Digital Elevation Model of the Antarctic Peninsula derived from ASTER Global DEM: methods and accuracy assessment

Directory of Open Access Journals (Sweden)

A. J. Cook

2012-10-01

Full Text Available A high resolution surface topography Digital Elevation Model (DEM is required to underpin studies of the complex glacier system on the Antarctic Peninsula. A complete DEM with better than 200 m pixel size and high positional and vertical accuracy would enable mapping of all significant glacial basins and provide a dataset for glacier morphology analyses. No currently available DEM meets these specifications. We present a new 100-m DEM of the Antarctic Peninsula (63–70° S, based on ASTER Global Digital Elevation Model (GDEM data. The raw GDEM products are of high-quality on the rugged terrain and coastal-regions of the Antarctic Peninsula and have good geospatial accuracy, but they also contain large errors on ice-covered terrain and we seek to minimise these artefacts. Conventional data correction techniques do not work so we have developed a method that significantly improves the dataset, smoothing the erroneous regions and hence creating a DEM with a pixel size of 100 m that will be suitable for many glaciological applications. We evaluate the new DEM using ICESat-derived elevations, and perform horizontal and vertical accuracy assessments based on GPS positions, SPOT-5 DEMs and the Landsat Image Mosaic of Antarctica (LIMA imagery. The new DEM has a mean elevation difference of −4 m (± 25 m RMSE from ICESat (compared to −13 m mean and ±97 m RMSE for the original ASTER GDEM, and a horizontal error of less than 2 pixels, although elevation accuracies are lower on mountain peaks and steep-sided slopes. The correction method significantly reduces errors on low relief slopes and therefore the DEM can be regarded as suitable for topographical studies such as measuring the geometry and ice flow properties of glaciers on the Antarctic Peninsula. The DEM is available for download from the NSIDC website: http://nsidc.org/data/nsidc-0516.html (Fusion of space-borne multi-baseline and multi-frequency interferometric results based on extended Kalman filter to generate high quality DEMs

Science.gov (United States)

Zhang, Xiaojie; Zeng, Qiming; Jiao, Jian; Zhang, Jingfa

2016-01-01

Repeat-pass Interferometric Synthetic Aperture Radar (InSAR) is a technique that can be used to generate DEMs. But the accuracy of InSAR is greatly limited by geometrical distortions, atmospheric effect, and decorrelations, particularly in mountainous areas, such as western China where no high quality DEM has so far been accomplished. Since each of InSAR DEMs generated using data of different frequencies and baselines has their own advantages and disadvantages, it is therefore very potential to overcome some of the limitations of InSAR by fusing Multi-baseline and Multi-frequency Interferometric Results (MMIRs). This paper proposed a fusion method based on Extended Kalman Filter (EKF), which takes the InSAR-derived DEMs as states in prediction step and the flattened interferograms as observations in control step to generate the final fused DEM. Before the fusion, detection of layover and shadow regions, low-coherence regions and regions with large height error is carried out because MMIRs in these regions are believed to be unreliable and thereafter are excluded. The whole processing flow is tested with TerraSAR-X and Envisat ASAR datasets. Finally, the fused DEM is validated with ASTER GDEM and national standard DEM of China. The results demonstrate that the proposed method is effective even in low coherence areas.

Konservative Therapie der Streßinkontinenz - was gibt es Neues?

Directory of Open Access Journals (Sweden)

Lange R

1999-01-01

Full Text Available Auf dem Gebiet der konservativen Inkontinenztherapie haben sich die pathophysiologischen Erkenntnisse, die Diagnostik und die Therapie in den letzten Jahren bedeutend weiter entwickelt, sodaß einige Anschauungen revidiert werden müssen: Neuere Untersuchungen haben gezeigt, daß auch ältere Patientinnen und solche mit einer Stressinkontinenz 3° von der konservativen Therapie profitieren. Trotzdem ist diesem Metier wenig Beachtung geschenkt worden. Eine Umfrage bei 661 niedergelassenen Gynäkologen zeigte deutliche Defizite auf diesem Gebiet auf. Mit dem Introitus-EMG steht heute dem Niedergelassenen eine einfache Methode zur Verfügung, die Funktionalität der Beckenbodenmuskulatur zu beurteilen, sowohl zur Auswahl der richtigen Behandlungsmethode - Reizstrom, Biofeedback-Training und Krankengymnastik - als auch zur Kontrolle der Physiotherapie. In Deutschland besteht eine aberwitzige Trennung einerseits in Facharztweiterbildung und operativer Therapie im stationären Bereich und andererseits in konservativer Therapie im ambulanten Sektor ohne Weiterbildung. Hierdurch ist eine breite Kluft zwischen neuen Erkenntnissen und allgemeinem Kenntnisstand entstanden. Sie zu schließen, ist eine wichtige Herausforderung an die Berufsverbände und wissenschaftlichen Gesellschaften.

Evaluating DEM results with FEM perspectives of load : soil interaction

NARCIS (Netherlands)

Tadesse, D.

2004-01-01

Keywords: Load - soil interaction, soil structure, soil mechanical properties, FEM (Finite Element Method), Plaxis (Finite Element Code), granular particles, shear stress, DEM (Distinct Element Method),

VT Lidar Hydro-flattened DEM (0.7 meter) - 2015 - Windham County

Data.gov (United States)

Vermont Center for Geographic Information — (Link to Metadata) This metadata applies to the following collection area(s): Windham County 2015 0.7m and Digital Elevation Model (DEM) dataset of the following...

Interview als Text vs. Interview als Interaktion

Directory of Open Access Journals (Sweden)

Arnulf Deppermann

2013-09-01

Full Text Available Das Interview ist nach wie vor das beliebteste sozialwissenschaftliche Verfahren des Datengewinns. Ökonomie der Erhebung, Vergleichbarkeit und die Möglichkeit, Einsicht in Praxisbereiche und historisch-biografische Dimensionen zu erhalten, die der direkten Beobachtung kaum zugänglich sind, machen seine Attraktivität aus. Zugleich mehren sich Kritiken, die seine Leistungsfähigkeit problematisieren, indem sie auf die begrenzte Reichweite der Explikationsfähigkeiten der Befragten, die Reaktivität der Erhebung oder die Differenz zwischen Handeln und dem Bericht über Handeln verweisen. Im Beitrag wird zwischen Ansätzen, die das Interview als Text, und solchen, die es als Interaktion verstehen, unterschieden. Nach dem Text-Verständnis werden Interviews unter inhaltlichen Gesichtspunkten analysiert und als Zugang zu einer vorgängigen sozialen oder psychischen Wirklichkeit angesehen. Das Interaktions-Verständnis versteht Interviews dagegen als situierte Praxis, in welcher im Hier und Jetzt von InterviewerInnen und Befragten gemeinsam soziale Sinnstrukturen hergestellt werden. Anhand ubiquitärer Phänomene der Interviewinteraktion – Fragen, Antworten und die Selbstpositionierung von InterviewerInnen und Befragten – werden Praktiken des interaktiv-performativen Handelns im Interview dargestellt. Ihre Relevanz für die Interviewkonstitution und ihre Erkenntnispotenziale für die Interviewauswertung werden aufgezeigt. Es wird dafür plädiert, die interaktive Konstitutionsweise von Interviews empirisch zu erforschen und methodisch konsequent zu berücksichtigen. URN: http://nbn-resolving.de/urn:nbn:de:0114-fqs1303131

All you need is shape: Predicting shear banding in sand with LS-DEM

Science.gov (United States)

Kawamoto, Reid; Andò, Edward; Viggiani, Gioacchino; Andrade, José E.

2018-02-01

This paper presents discrete element method (DEM) simulations with experimental comparisons at multiple length scales-underscoring the crucial role of particle shape. The simulations build on technological advances in the DEM furnished by level sets (LS-DEM), which enable the mathematical representation of the surface of arbitrarily-shaped particles such as grains of sand. We show that this ability to model shape enables unprecedented capture of the mechanics of granular materials across scales ranging from macroscopic behavior to local behavior to particle behavior. Specifically, the model is able to predict the onset and evolution of shear banding in sands, replicating the most advanced high-fidelity experiments in triaxial compression equipped with sequential X-ray tomography imaging. We present comparisons of the model and experiment at an unprecedented level of quantitative agreement-building a one-to-one model where every particle in the more than 53,000-particle array has its own avatar or numerical twin. Furthermore, the boundary conditions of the experiment are faithfully captured by modeling the membrane effect as well as the platen displacement and tilting. The results show a computational tool that can give insight into the physics and mechanics of granular materials undergoing shear deformation and failure, with computational times comparable to those of the experiment. One quantitative measure that is extracted from the LS-DEM simulations that is currently not available experimentally is the evolution of three dimensional force chains inside and outside of the shear band. We show that the rotations on the force chains are correlated to the rotations in stress principal directions.

Diagnostic of the temperature and differential emission measure (DEM based on Hinode/XRT data

Directory of Open Access Journals (Sweden)

P. Rudawy

2008-10-01

Full Text Available We discuss here various methodologies and an optimal strategy of the temperature and emission measure diagnostics based on Hinode X-Ray Telescope data. As an example of our results we present the determination of the temperature distribution of the X-rays emitting plasma using a filters ratio method and three various methods of the calculation of the differential emission measure (DEM. We have found that all these methods give results similar to the two filters ratio method. Additionally, all methods of the DEM calculation gave similar solutions. We can state that the majority of the pairs of the Hinode filters allows one to derive the temperature and emission measure in the isothermal plasma approximation using standard diagnostics based on the two filters ratio method. In cases of strong flares one can also expect good conformity of the results obtained using a Withbroe – Sylwester, genetic algorithm and least-squares methods of the DEM evaluation.

Combined SDO/AIA, Hinode/XRT and FOXSI-2 microflare observations - DEM analysis and energetics

Science.gov (United States)

Panchapakesan, S. A.; Glesener, L.; Vievering, J. T.; Ryan, D.; Christe, S.; Inglis, A. R.; Buitrago-Casas, J. C.; Musset, S.; Krucker, S.

2017-12-01

The Focusing Optics X-ray Solar Imager (FOXSI) sounding rocket makes directimaging and spectral observation of the Sun in hard X-rays (HXRs) using highlysensitive focusing HXR optics. The second flight of FOXSI was launchedsuccessfully on 11 December 2014 and observed significant HXR emissions duringmicroflares. Some of these flares showed heating up to severalmillion Kelvin and were visible in the Extreme Ultraviolet (EUV) with the AtmosphericImaging Assembly (SDO/AIA). Spectral observations from FOXSI suggest emission upto 10-12 MK. We utilize SDO/AIA EUV, Hinode/XRT soft X-ray, and FOXSI-2 highenergy X-ray observations to derive the differential emission measure (DEM) ofthe microflares. The AIA and XRT observations provide broad temperaturecoverage but are poorly constrained at the hotter end. We therefore use FOXSI-2to better determine the high temperature component, thus producing a moreconstrained DEM than is possible with typically available observations. We usethis more highly constrained DEM to investigate the energetics of the observedmicroflares.

Wissen - nihilismus – bejahung: Fichtes transzendentalphilosophischer offenbarungsbegriff

Directory of Open Access Journals (Sweden)

Drilo Kazimir

2010-01-01

Full Text Available In dem Zeitraum zwischen 1792 und 1805 entwickelt Johann Gottlieb Fichte zwei verschiedene Bestimmungen des Offenbarungsbegriffs: 1. Offenbarung ist eine auf der göttlichen Autorität beruhende Lehre, mit der das sittliche Handeln gefördert werden soll, 2. Offenbarung ist das Zusammenhalten des Wissens im Sein und so die Rettung vor dem Nihilismus. In dem Beitrag wird gezeigt, dass Fichte in seiner späten Wissenschaftslehre und in ständiger Auseinandersetzung mit Jacobis Kritik, Idealismus sei Nihilismus, mit dieser letzten Bestimmung eine tragfähige Alternative zu dem ersten, traditionellen Offenbarungsbegriff gibt. Offenbarung, so wie Fichte sie in seiner Spätphilosophie versteht, dient weder der Förderung der Moral, noch hält sie den Prozess der Selbsterkenntnis des Absoluten im Gang oder ist eine Entäußerung Gottes. Der Begriff der transzendentalphilosophischen Offenbarung hat vielmehr seine Bedeutung als der Garant der Realität des Wissens. Als Beleg für diese These dienen die Schriften „Versuch einer Kritik aller Offenbarung“, „Erlanger Wissenschaftslehre“ und „Erlanger Logik“. Darüber hinaus wird auf die Interpretation der Fichte‘schen Religionsphilosophie von Emanuel Hirsch eingegangen, der Fichtes Offenbarungsbegriff im Rahmen der theologischen Fragestellung mit dem Gedanken der „Bejahung“ des Absoluten produktiv weiterführt.

3D DEM analyses of the 1963 Vajont rock slide

Science.gov (United States)

Boon, Chia Weng; Houlsby, Guy; Utili, Stefano

2013-04-01

The 1963 Vajont rock slide has been modelled using the distinct element method (DEM). The open-source DEM code, YADE (Kozicki & Donzé, 2008), was used together with the contact detection algorithm proposed by Boon et al. (2012). The critical sliding friction angle at the slide surface was sought using a strength reduction approach. A shear-softening contact model was used to model the shear resistance of the clayey layer at the slide surface. The results suggest that the critical sliding friction angle can be conservative if stability analyses are calculated based on the peak friction angles. The water table was assumed to be horizontal and the pore pressure at the clay layer was assumed to be hydrostatic. The influence of reservoir filling was marginal, increasing the sliding friction angle by only 1.6˚. The results of the DEM calculations were found to be sensitive to the orientations of the bedding planes and cross-joints. Finally, the failure mechanism was investigated and arching was found to be present at the bend of the chair-shaped slope. References Boon C.W., Houlsby G.T., Utili S. (2012). A new algorithm for contact detection between convex polygonal and polyhedral particles in the discrete element method. Computers and Geotechnics, vol 44, 73-82, doi.org/10.1016/j.compgeo.2012.03.012. Kozicki, J., & Donzé, F. V. (2008). A new open-source software developed for numerical simulations using discrete modeling methods. Computer Methods in Applied Mechanics and Engineering, 197(49-50), 4429-4443.

DEM Simulation of Biaxial Compression Experiments of Inherently Anisotropic Granular Materials and the Boundary Effects

Directory of Open Access Journals (Sweden)

Zhao-Xia Tong

2013-01-01

Full Text Available The reliability of discrete element method (DEM numerical simulations is significantly dependent on the particle-scale parameters and boundary conditions. To verify the DEM models, two series of biaxial compression tests on ellipse-shaped steel rods are used. The comparisons on the stress-strain relationship, strength, and deformation pattern of experiments and simulations indicate that the DEM models are able to capture the key macro- and micromechanical behavior of inherently anisotropic granular materials with high fidelity. By using the validated DEM models, the boundary effects on the macrodeformation, strain localization, and nonuniformity of stress distribution inside the specimens are investigated using two rigid boundaries and one flexible boundary. The results demonstrate that the boundary condition plays a significant role on the stress-strain relationship and strength of granular materials with inherent fabric anisotropy if the stresses are calculated by the force applied on the wall. However, the responses of the particle assembly measured inside the specimens are almost the same with little influence from the boundary conditions. The peak friction angle obtained from the compression tests with flexible boundary represents the real friction angle of particle assembly. Due to the weak lateral constraints, the degree of stress nonuniformity under flexible boundary is higher than that under rigid boundary.

Die Sprache der Körper

Directory of Open Access Journals (Sweden)

Ulla Bock

2000-07-01

Full Text Available Was ist Geschlecht? Diese Frage beantwortet Gitta Mühlen Achs vor dem theoretischen Hintergrund des ‚doing gender‘, nach dem Geschlecht nicht etwas ist, was wir haben oder sind, sondern etwas, was wir tun. Natürlich gibt es Geschlecht, aber keine natürlichen Geschlechterkategorien, ist die grundlegende Aussage des Buches. Das Anliegen der Autorin ist es zu zeigen, wie wir mit unseren Körpern Geschlecht zum Ausdruck bringen und wie mit einer geschlechtsspezifischen Körpersprache Hierarchien (nicht nur zwischen den Geschlechtern symbolisiert und gefestigt werden. Ihre Aussagen werden durch ein umfangreiches Bildmaterial im zweiten Teil des Buches erhärtet. Am Ende steht die Erkenntnis, daß Schweigen in der Körpersprache praktisch unmöglich ist, daß aber durch eine Sensibilisierung für die Sprache der Körper den traditionellen Verhaltensmustern entgegengewirkt werden kann.

Effect of DEM resolution and comparison between different weighting factors for hydrologic connectivity index

Science.gov (United States)

Cantreul, Vincent; Cavalli, Marco; Degré, Aurore

2016-04-01

The emerging concept of hydrological connectivity is difficult to quantify. Some indices have been proposed. The most cited is Borselli's one. It mainly uses the DEM as input. The pixel size may strongly impacts the result of the calculation. It has not been studied yet in silty areas. Another important aspect is the choice of the weighting factor which strongly influences the index value. The objective of this poster is so to compare 8 different DEM's resolutions (12, 24, 48, 72, 96, 204, 504 and 996cm) and 3 different weighting factors (factor C of Wischmeier, Manning's factor and rugosity index) in the Borselli's index calculation. The IC was calculated in a 124ha catchment (Hevillers), in the loess belt, in Belgium. The DEM used is coming from a UAV with a maximum resolution of 12 cm. Permanent covered surfaces are not considered in order to avoid artefact due to the vegetation (2% of the surface). Regarding the DEM pixel size, the IC increases for a given pixel when the pixel size decreases. That confirms some results observed in the Alpine region by Cavalli (2014). The mean difference between 12 cm and 10 m resolution is 35% with higher values up to 100% for higher connectivity zones (flow paths). Another result is the lower impact of connections in the watershed (grass strips…) at lower pixel sizes. This is linked to the small width of some connections which are sometimes comparing to cell size. Furthermore, a great loss of precision is observed from the 500 cm pixel size and upper. That remark is quite intuitive. Finally, some very well disconnected zones appear for the highest resolutions. Regarding the weighting factor, IC values calculated using C factor are lower than with the rugosity index which is only a topographic factor. With very high resolution DEM, it permits to represent the fine topography. For the C factor, the zones up to very well disconnected areas (grass strips, wood…) are well represented with lower index values than downstream

Comparative study of air quality by the North Sea and Baltic Sea; Vergleichsuntersuchungen der Luftqualitaet an Nord- und Ostsee

Energy Technology Data Exchange (ETDEWEB)

Moriske, H.J.; Turowski, E.; Klar, A.; Schoendube, M.; Ebert, G.; Konieczny, L. [Umweltbundesamt, Berlin (Germany). Inst. fuer Wasser-, Boden- und Lufthygiene

2000-01-01

Air quality measurements were carried out in the North Sea and Baltic Sea regions. The results are summarized in this contribution from the hygienic view. [German] Im Rahmen eines Forschungsprojektes des Umweltbundesamtes, das zwischen 1996 und 1998 mit dem Titel 'Erfassung gasfoermiger und partikelfoermiger Bestandteile der Umgebungsluft an Nord- und Ostsee - Untersuchungen zur hygienischen Bedeutung des maritimen Aerosols' durchgefuehrt wurde, sollte die Frage unterschiedlicher Luftqualitaet an Nord- und Ostsee beantwortet werden und eine aktuelle Bestandsaufnahme vorgenommen werden. Der Artikel fasst die Forschungsergebnisse aus hygienischer Sicht zusammen. (orig./SR)

„Überholen ohne einzuholen“ Die Entwicklung von Technologien für übermorgen in Kernenergie und Mikroelektronik der DDR

Science.gov (United States)

Barkleit, Gerhard

Dem nuklearen Patt zwischen Ostblock und westlichem Staatenbündnis ist es nach weitgehend übereinstimmender Auffassung von Politik und Wissenschaft zu danken, dass der "Kalte Krieg" in der zweiten Hälfte des 20. Jahrhunderts nicht zum weltumfassenden Flächenbrand eskalierte. An der raschen Herstellung dieses Patts waren zwei Dresdner Physiker maßgeblich beteiligt, deren einer im Manhattan-Projekt in den USA gearbeitet hatte und später in England der Spionage für die Sowjetunion und des Verrats des Know-how der Atombombe überführt wurde.

Lauter böse Königinnen

Directory of Open Access Journals (Sweden)

Konstanze Fliedl

2004-11-01

Full Text Available An sieben Prosatexten aus dem Zeitraum zwischen 1891 bis 1953 untersucht die Studie das Motiv der neidischen Mutter nach psychoanalytischen Gesichtspunkten. Als Basisannahme gilt Freuds These vom Penisneid: Die Mutter gönnt der Tochter nicht einmal den Penis-Ersatz. Bei aller Faszination der gewählten Beispiele erscheint der methodische Rahmen zu eng: Sowohl auf sozialgeschichtliche Kontextualisierung als auch auf die kritische Relativierung des Penisneid-Theorems wurde verzichtet. Auf diese Weise lassen sich die methodischen Probleme orthodoxer psychoanalytischer Literaturinterpretation nicht vermeiden. Die Vieldeutigkeit des literarischen Motivs kommt daher leider zu kurz.

Digital Elevation Model (DEM), DEM data are useful for terrain analysis and modeling including slope and aspect calculations. They may be used to produced shaded relief maps and contour maps., Published in 2001, 1:24000 (1in=2000ft) scale, Louisiana State University (LSU).

Data.gov (United States)

NSGIC Education | GIS Inventory — Digital Elevation Model (DEM) dataset current as of 2001. DEM data are useful for terrain analysis and modeling including slope and aspect calculations. They may be...

Det Ambiente

DEFF Research Database (Denmark)

Schmidt, Ulrik

Det ambiente er iscenesættelsen af en karakteristisk sanseoplevelse, der er kendetegnet ved fornemmelsen af at være omgivet. I dag bliver begrebet om det ambiente mest anvendt i forbindelse med musikgenren ’ambient musik’. Det ambiente er dog ikke essentielt knyttet til det musikalske, men må...... forstås som et betydeligt bredere fænomen i den moderne æstetiske kultur, der spiller en væsentlig rolle i oplevelsen af moderne transportformer, arkitektur, film, lydkunst, installationskunst og digitale multimedieiscenesættelser. En forståelse af det ambiente er derfor centralt for forståelsen af en...... moderne æstetiseret oplevelseskultur i almindelighed. Da det ambiente ikke hidtil har været gjort til genstand for en mere indgående teoretisk behandling, er der dog stor usikkerhed omkring, hvad fænomenet overhovedet indebærer. Hovedformålet med Det ambiente – Sansning, medialisering, omgivelse er derfor...

The EVE plus RHESSI DEM for Solar Flares, and Implications for Residual Non-Thermal X-Ray Emission

Science.gov (United States)

McTiernan, James; Caspi, Amir; Warren, Harry

2016-05-01

Solar flare spectra are typically dominated by thermal emission in the soft X-ray energy range. The low energy extent of non-thermal emission can only be loosely quantified using currently available X-ray data. To address this issue, we combine observations from the EUV Variability Experiment (EVE) on-board the Solar Dynamics Observatory (SDO) with X-ray data from the Reuven Ramaty High Energy Spectroscopic Imager (RHESSI) to calculate the Differential Emission Measure (DEM) for solar flares. This improvement over the isothermal approximation helps to resolve the ambiguity in the range where the thermal and non-thermal components may have similar photon fluxes. This "crossover" range can extend up to 30 keV.Previous work (Caspi et.al. 2014ApJ...788L..31C) concentrated on obtaining DEM models that fit both instruments' observations well. For this current project we are interested in breaks and cutoffs in the "residual" non-thermal spectrum; i.e., the RHESSI spectrum that is left over after the DEM has accounted for the bulk of the soft X-ray emission. As in our earlier work, thermal emission is modeled using a DEM that is parametrized as multiple gaussians in temperature. Non-thermal emission is modeled as a photon spectrum obtained using a thin-target emission model ('thin2' from the SolarSoft Xray IDL package). Spectra for both instruments are fit simultaneously in a self-consistent manner.For this study, we have examined the DEM and non-thermal resuidual emission for a sample of relatively large (GOES M class and above) solar flares observed from 2011 to 2014. The results for the DEM and non-thermal parameters found using the combined EVE-RHESSI data are compared with those found using only RHESSI data.

Effect of aging in HDPE blended with DEM in decalin

International Nuclear Information System (INIS)

Silva, P.; Albano, C.; Karam, A.; Vargas, M.G.; Perera, R.

2006-01-01

Electron paramagnetic resonance (EPR) was used to study the effect of aging on irradiated samples of high-density polyethylene (HDPE) blended with diethyl maleate (DEM) in different proportions. Initially, we synthesize the HDPE using bis-(cyclopentadienyl) zirconium dichloride and P-MAO. The functionalization of the synthesized HDPE was carried out in a 10% weight/vol of polyethylene in decalin solution using different percentages of diethyl maleate (5, 10, 15 and 30% in weight). The samples were irradiated at 5, 15 and 30 kGy. An exponential decay in the total free radicals concentration was observed in the pure HDPE sample at the 15 and 30 kGy irradiation doses, as it was expected. For the 15 and 30 kGy irradiation doses the HDPE blended with 15 and 30% of DEM in decalin shows an increase in the total free radical concentrations as the storage time is increased. This behavior has been interpreted in terms of trapped free radicals. (Author)

Parallel Resolved Open Source CFD-DEM: Method, Validation and Application

Directory of Open Access Journals (Sweden)

A. Hager

2014-03-01

Full Text Available In the following paper the authors present a fully parallelized Open Source method for calculating the interaction of immersed bodies and surrounding fluid. A combination of computational fluid dynamics (CFD and a discrete element method (DEM accounts for the physics of both the fluid and the particles. The objects considered are relatively big compared to the cells of the fluid mesh, i.e. they cover several cells each. Thus this fictitious domain method (FDM is called resolved. The implementation is realized within the Open Source framework CFDEMcOupling (www.cfdem.com, which provides an interface between OpenFOAM® based CFD-solvers and the DEM software LIGGGHTS (www.liggghts.com. While both LIGGGHTS and OpenFOAM® were already parallelized, only a recent improvement of the algorithm permits the fully parallel computation of resolved problems. Alongside with a detailed description of the method, its implementation and recent improvements, a number of application and validation examples is presented in the scope of this paper.

GPU based contouring method on grid DEM data

Science.gov (United States)

Tan, Liheng; Wan, Gang; Li, Feng; Chen, Xiaohui; Du, Wenlong

2017-08-01

This paper presents a novel method to generate contour lines from grid DEM data based on the programmable GPU pipeline. The previous contouring approaches often use CPU to construct a finite element mesh from the raw DEM data, and then extract contour segments from the elements. They also need a tracing or sorting strategy to generate the final continuous contours. These approaches can be heavily CPU-costing and time-consuming. Meanwhile the generated contours would be unsmooth if the raw data is sparsely distributed. Unlike the CPU approaches, we employ the GPU's vertex shader to generate a triangular mesh with arbitrary user-defined density, in which the height of each vertex is calculated through a third-order Cardinal spline function. Then in the same frame, segments are extracted from the triangles by the geometry shader, and translated to the CPU-side with an internal order in the GPU's transform feedback stage. Finally we propose a "Grid Sorting" algorithm to achieve the continuous contour lines by travelling the segments only once. Our method makes use of multiple stages of GPU pipeline for computation, which can generate smooth contour lines, and is significantly faster than the previous CPU approaches. The algorithm can be easily implemented with OpenGL 3.3 API or higher on consumer-level PCs.

Sick building syndrome - results of the 'Proklima' research project; Befindlichkeitsstoerungen in Buerogebaeuden - Ergebnisse aus dem Proklima Forschungsprojekt

Energy Technology Data Exchange (ETDEWEB)

Kruppa, B. [Bundesindustrieverband Heizungs-, Klima-, Sanitaertechnik und Technische Gebaeudesysteme e.V., Bonn (Germany); Bischof, W.; Brasche, S. [Arbeitsgruppe Raumklimatologie der FSU Jena (ARK), Erfurt (Germany); Bullinger-Naber, M. [Hamburg Univ. (Germany). Abt. fuer Medizinische Psychologie; Mayer, E. [Fraunhofer-Institut fuer Bauphysik, Holzkirchen (Germany); Gebhardt, H. [Wuppertal Univ. (Gesamthochschule) (Germany). Inst. fuer Arbeitsmedizin, Sicherheitstechnik und Ergonomie

2000-07-01

In the world's biggest research project, the sick building syndrome was investigated in Germany between 1995 and 1999. In all, 8 air-conditioned buildings and 6 non-air-conditioned buildings, 40 space HVAC systems and 1497 places of work were analyzed, and 4,500 persons were asked to provide data. For the first time ever, measured physical, biological and chemical data were compared with the subjective data provided by the inquiry forms. It was found that the concentrations and hygienic status of air conditioning systems do have an effect on subjective comfort. Buildings with well-designed and well-serviced space HVAC systems had better results than buildings without air conditioning systems. However, it is the psychosocial environment and the job description of building inhabitants that decide their response in terms of sick building syndrome. Factors like gender, job satisfaction, job specifications and educational level are more important than space HVAC systems. [German] Im Rahmen eines der weltweit groessten Forschungsprojekte zum Thema 'Sick Building Syndrome' wurden in Deutschland zwischen 1995 und 1999 umfangreiche Untersuchungen durchgefuehrt mit dem Ziel, die Ursachen und Folgen von Befindlichkeitsstoerungen in Buerogebaeuden zu ermitteln. Insgesamt wurden 8 klimatisierte und 6 nicht klimatisierte Gebaeude, 40 raumlufttechnische Anlagen und 1497 Arbeitsplaetze untersucht sowie ueber 4.500 Personen befragt. Die Ergebnisse erlauben zum ersten Mal einen direkten Vergleich der gemessenen physikalischen, biologischen und chemischen Werte mit den subjektiven Angaben (Fragebogendaten) an klimatisierten und nicht klimatisierten Arbeitsplaetzen. Die Auswertung zeigt, dass die Konzentration der Anlagen und deren hygienischer Wartungszustand einen Einfluss auf die Befindlichkeit der Mitarbeiter haben. Gebaeude mit gut geplanten und gewarteten RLT-Anlagen schneiden in der Bewertung sogar besser ab als nicht klimatisierte Gebaeude. Die groessten

FEM × DEM: a new efficient multi-scale approach for geotechnical problems with strain localization

Directory of Open Access Journals (Sweden)

Nguyen Trung Kien

2017-01-01

Full Text Available The paper presents a multi-scale modeling of Boundary Value Problem (BVP approach involving cohesive-frictional granular materials in the FEM × DEM multi-scale framework. On the DEM side, a 3D model is defined based on the interactions of spherical particles. This DEM model is built through a numerical homogenization process applied to a Volume Element (VE. It is then paired with a Finite Element code. Using this numerical tool that combines two scales within the same framework, we conducted simulations of biaxial and pressuremeter tests on a cohesive-frictional granular medium. In these cases, it is known that strain localization does occur at the macroscopic level, but since FEMs suffer from severe mesh dependency as soon as shear band starts to develop, the second gradient regularization technique has been used. As a consequence, the objectivity of the computation with respect to mesh dependency is restored.

Parallelizing flow-accumulation calculations on graphics processing units—From iterative DEM preprocessing algorithm to recursive multiple-flow-direction algorithm

Science.gov (United States)

Qin, Cheng-Zhi; Zhan, Lijun

2012-06-01

As one of the important tasks in digital terrain analysis, the calculation of flow accumulations from gridded digital elevation models (DEMs) usually involves two steps in a real application: (1) using an iterative DEM preprocessing algorithm to remove the depressions and flat areas commonly contained in real DEMs, and (2) using a recursive flow-direction algorithm to calculate the flow accumulation for every cell in the DEM. Because both algorithms are computationally intensive, quick calculation of the flow accumulations from a DEM (especially for a large area) presents a practical challenge to personal computer (PC) users. In recent years, rapid increases in hardware capacity of the graphics processing units (GPUs) provided in modern PCs have made it possible to meet this challenge in a PC environment. Parallel computing on GPUs using a compute-unified-device-architecture (CUDA) programming model has been explored to speed up the execution of the single-flow-direction algorithm (SFD). However, the parallel implementation on a GPU of the multiple-flow-direction (MFD) algorithm, which generally performs better than the SFD algorithm, has not been reported. Moreover, GPU-based parallelization of the DEM preprocessing step in the flow-accumulation calculations has not been addressed. This paper proposes a parallel approach to calculate flow accumulations (including both iterative DEM preprocessing and a recursive MFD algorithm) on a CUDA-compatible GPU. For the parallelization of an MFD algorithm (MFD-md), two different parallelization strategies using a GPU are explored. The first parallelization strategy, which has been used in the existing parallel SFD algorithm on GPU, has the problem of computing redundancy. Therefore, we designed a parallelization strategy based on graph theory. The application results show that the proposed parallel approach to calculate flow accumulations on a GPU performs much faster than either sequential algorithms or other parallel GPU

Travestie im alten Ägypten

Directory of Open Access Journals (Sweden)

prof.Magda Abdalla

2011-01-01

Full Text Available Der Artikel möchte versuchen zu beweisen, dass den alten Ägyptern Travestie bekannt war. In verschiedenen Texten wie Märchen, Fabeln und Liebesgedichten auf Papyri und Ostraka, finden sich Belege von Travestie. Zuerst muss jedoch betont werden, dass es einen Unterschied zwischen dem Begriff der Travestie, mit anderen Worten der Verkleidung,[1] und dem der Metamorphose, dem Verwandeln der Gestalt,[2] gibt. [1] Tra.ve´stie: f. satirisch, Verspottung eines Literaturwerkes, bei der (im Unterschied zur Parodie der Inhalt beibehalten und die Form verändert wird (frz. travestie „Verkleidung“; zu lat. trans „hinüber“+vestire, „kleiden“. G. Wahrig,. Deutsches Wörterbuch, mit einem „Lexikon der deutschen Sprachlehre“( München, 1987, 1292. Es gibt auch eine moderne Definition des Begriffes Travestie aus dem 17. Jahrhundert. Hier beinhaltet diese ein Verfahren oder eine kritische Zielsetzung.w.Karrer.,Parodie Travestie, Pastiche (München, 1977, 19, 46. [2] Me.ta.mor´pho.se Umwandlung eines Gesteins in ein anderes; Wandlung des jungen Tieres durch verschiedene äußere Stadien; Verwandlung von Menschen in Tiere, Pflanzen, Quellen usw. (Deutsches Wörterbuch, 883. الإحصائيات

Evaluating the Quality and Accuracy of TanDEM-X Digital Elevation Models at Archaeological Sites in the Cilician Plain, Turkey

Directory of Open Access Journals (Sweden)

Stefan Erasmi

2014-10-01

Full Text Available Satellite remote sensing provides a powerful instrument for mapping and monitoring traces of historical settlements and infrastructure, not only in distant areas and crisis regions. It helps archaeologists to embed their findings from field surveys into the broader context of the landscape. With the start of the TanDEM-X mission, spatially explicit 3D-information is available to researchers at an unprecedented resolution worldwide. We examined different experimental TanDEM-X digital elevation models (DEM that were processed from two different imaging modes (Stripmap/High Resolution Spotlight using the operational alternating bistatic acquisition mode. The quality and accuracy of the experimental DEM products was compared to other available DEM products and a high precision archaeological field survey. The results indicate the potential of TanDEM-X Stripmap (SM data for mapping surface elements at regional scale. For the alluvial plain of Cilicia, a suspected palaeochannel could be reconstructed. At the local scale, DEM products from TanDEM-X High Resolution Spotlight (HS mode were processed at 2 m spatial resolution using a merge of two monostatic/bistatic interferograms. The absolute and relative vertical accuracy of the outcome meet the specification of high resolution elevation data (HRE standards from the National System for Geospatial Intelligence (NSG at the HRE20 level.

Über diese Ausgabe

Directory of Open Access Journals (Sweden)

Editors / Herausgeber

2015-06-01

Full Text Available Erzählungen können absichtlich die Unwahrheit verbreiten. Ob der Autor bzw. die Autorin selbst der Lüge bezichtigt werden kann oder sollte, hängt allerdings nicht nur davon ab, wie man Lüge definiert, sondern auch davon, welchen Status man der Erzählung zuschreibt: Worin unterscheidet sich der Wahrheitsanspruch fiktionaler Äußerungen in literarischen Texten von dem faktualen Erzählens? Kann Fiktion lügen? Eva-Maria Konrad plädiert nach einer Auseinandersetzung mit Genettes Studie zu Paratexten dafür, vom Autor verantwortete Vorworte in literarischen Texten nicht generell als fiktionale Äußerungen zu betrachten – unter bestimmten Voraussetzungen, so Konrad, könnten daher auch Herausgeberfiktionen als Lügen bezeichnet werden. Jochen Mecke hingegen argumentiert, dass fiktionale Literatur nie lügen kann, da jede Zuschreibung von Aufrichtigkeit an literarische Texte auf jenem Pakt zwischen Leser(in und Autor(in basiert, den Samuel Taylor Coleridge als „willing suspension of disbelief“ bezeichnet hat. Entscheidend ist dabei, so Mecke, nicht die Fiktivität der erzählten Ereignisse, sondern die Fiktionalität der Aussageinstanz. Sabine Schlickers untersucht in ihrem Beitrag zum unzuverlässigen und verstörenden Erzählen im argentinischen Kino, wie Ambiguität entsteht – der zeitgenössische Film macht es dem Publikum häufig schwer, dem impliziten Autor eine eindeutige Intention, sei es Ironie, Spiel oder Lüge, zuzuschreiben. Im vierten Beitrag des Themenhefts widmet sich Tanja Serisier der Problematik der Glaubwürdigkeit in Vergewaltigungsnarrativen und diskutiert die Differenzen zwischen juristischen Wahrheitsbegriffen auf der einen und dem subjektiven Wahrheitsempfinden auf der anderen Seite. Mit Ansgar Nünning konnte diesmal für die Rubrik „My Narratology“ ein Interviewpartner gewonnen werden, dessen Arbeiten zur historischen, kontextorientierten und kulturwissenschaftlichen Narratologie einen ma

Large-baseline InSAR for precise topographic mapping: a framework for TanDEM-X large-baseline data

Directory of Open Access Journals (Sweden)

M. Pinheiro

2017-09-01

Full Text Available The global Digital Elevation Model (DEM resulting from the TanDEM-X mission provides information about the world topography with outstanding precision. In fact, performance analysis carried out with the already available data have shown that the global product is well within the requirements of 10 m absolute vertical accuracy and 2 m relative vertical accuracy for flat to moderate terrain. The mission's science phase took place from October 2014 to December 2015. During this phase, bistatic acquisitions with across-track separation between the two satellites up to 3.6 km at the equator were commanded. Since the relative vertical accuracy of InSAR derived elevation models is, in principle, inversely proportional to the system baseline, the TanDEM-X science phase opened the doors for the generation of elevation models with improved quality with respect to the standard product. However, the interferometric processing of the large-baseline data is troublesome due to the increased volume decorrelation and very high frequency of the phase variations. Hence, in order to fully profit from the increased baseline, sophisticated algorithms for the interferometric processing, and, in particular, for the phase unwrapping have to be considered. This paper proposes a novel dual-baseline region-growing framework for the phase unwrapping of the large-baseline interferograms. Results from two experiments with data from the TanDEM-X science phase are discussed, corroborating the expected increased level of detail of the large-baseline DEMs.

Turkey's climate policy between ambition and reality; Die Klimapolitik der Tuerkei zwischen Anspruch und Wirklichkeit

Energy Technology Data Exchange (ETDEWEB)

Gieler, Wolfgang [Istanbul Univ. (Turkey). Interkulturelle und Internationale Studien; Cetinyilmaz, Hakan

2015-07-01

This volume examines the Turkish climate policy and its main influencing factors. In what policy area, the priorities of Turkey between environmental, climate, and growth policies are to be located? What are the shaping factors of Turkish climate policy? What driving torques? In Turkish and international political science analyzes the subject has been previously treated only in basic approaches, so that the volume can be understood as a basic introduction to the Turkish climate policy. [German] Dieser Band untersucht die tuerkische Klimapolitik und ihre wichtigsten Einflussfaktoren. In welchem Politikbereich sind die Prioritaeten der Tuerkei zwischen Umwelt-, Klima-, und Wachstumspolitik zu verorten? Welches sind die praegenden Faktoren tuerkischer Klimapolitik? Welche Antriebsmomente? In tuerkischen wie auch internationalen politikwissenschaftlichen Analysen ist das Thema bisher nur in Ansaetzen behandelt worden, so dass der Band als grundlegende Einfuehrung in die tuerkische Klimapolitik verstanden werden kann.

Development of a LiDAR derived digital elevation model (DEM) as Input to a METRANS geographic information system (GIS).

Science.gov (United States)

2011-05-01

This report describes an assessment of digital elevation models (DEMs) derived from : LiDAR data for a subset of the Ports of Los Angeles and Long Beach. A methodology : based on Monte Carlo simulation was applied to investigate the accuracy of DEMs ...

Drainage network extraction from a high-resolution DEM using parallel programming in the .NET Framework

Science.gov (United States)

Du, Chao; Ye, Aizhong; Gan, Yanjun; You, Jinjun; Duan, Qinyun; Ma, Feng; Hou, Jingwen

2017-12-01

High-resolution Digital Elevation Models (DEMs) can be used to extract high-accuracy prerequisite drainage networks. A higher resolution represents a larger number of grids. With an increase in the number of grids, the flow direction determination will require substantial computer resources and computing time. Parallel computing is a feasible method with which to resolve this problem. In this paper, we proposed a parallel programming method within the .NET Framework with a C# Compiler in a Windows environment. The basin is divided into sub-basins, and subsequently the different sub-basins operate on multiple threads concurrently to calculate flow directions. The method was applied to calculate the flow direction of the Yellow River basin from 3 arc-second resolution SRTM DEM. Drainage networks were extracted and compared with HydroSHEDS river network to assess their accuracy. The results demonstrate that this method can calculate the flow direction from high-resolution DEMs efficiently and extract high-precision continuous drainage networks.

Flow Dynamics of green sand in the DISAMATIC moulding process using Discrete element method (DEM)

International Nuclear Information System (INIS)

Hovad, E; Walther, J H; Thorborg, J; Hattel, J H; Larsen, P

2015-01-01

The DISAMATIC casting process production of sand moulds is simulated with DEM (discrete element method). The main purpose is to simulate the dynamics of the flow of green sand, during the production of the sand mould with DEM. The sand shot is simulated, which is the first stage of the DISAMATIC casting process. Depending on the actual casting geometry the mould can be geometrically quite complex involving e.g. shadowing effects and this is directly reflected in the sand flow during the moulding process. In the present work a mould chamber with “ribs” at the walls is chosen as a baseline geometry to emulate some of these important conditions found in the real moulding process. The sand flow is simulated with the DEM and compared with corresponding video footages from the interior of the chamber during the moulding process. The effect of the rolling resistance and the static friction coefficient is analysed and discussed in relation to the experimental findings. (paper)

Landsat 5 TM images and DEM in lithologic mapping of Payen Volcanic Field (Mendoza Province, Argentina)

International Nuclear Information System (INIS)

Fornaciai, A.; Bisson, M.; Mazzarini, F.; Del Carlo, P.; Pasquare, G.

2009-01-01

Satellite image such as Landsat 5 TM scene provides excellent representation of Earth and synoptic view of large geographic areas in different band combination. Landsat TM images allow automatic and semi-automatic classification of land cover, nevertheless the software frequently may some difficulties in distinguishing between similar radiometric surfaces. In this case, the use of Digital Elevation Model (DEM) can be an important tool to identify different surface covers. In this study, several False Color Composite (FCC) of Landsat 5 TM Image, DEM and the respective draped image of them, were used to delineate lithological boundaries and tectonic features of regional significance of the Paven Volcanic Field (PVF). PFV is a Quaternary fissural structure belonging to the black-arc extensional areas of the Andes in the Mendoza Province (Argentina) characterized by many composite basaltic lava flow fields. The necessity to identify different lava flows with the same composition, and then with same spectral features, allows to highlight the improvement of synergic use of TM images and shaded DEM in the visual interpretation. Information obtained from Satellite data and DEM have been compared with previous geological maps and transferred into a topographical base map. Based on these data a new lithological map at 1:100.000 scale has been presented [it

Electricity conflicts. Self-conception and strategic action of the electricity industry between politics, industry, the environment and the public (1970-1989); Stromkonflikte. Selbstverstaendnis und strategisches Handeln der Stromwirtschaft zwischen Politik, Industrie, Umwelt und Oeffentlichkeit (1970-1989)

Energy Technology Data Exchange (ETDEWEB)

Erhardt, Hendrik

2017-07-01

The energy industry has undergone a fundamental transformation process over the past 50 years. The author examines in this study the beginnings and challenges of this process since the 1970s on the basis of previously unevaluated corporate and association sources. For the areas of energy demand, industry and the environment and the public, the author analyzes the behavior of the electricity industry, which since the 1970s has been moving between persistence and change pressure. What leeway did the companies have in these three areas? How did the energy suppliers' actions shape the German energy system? And how did their actions change their image in public? These questions the changes in the energy industry have so far neither been scientifically adequately investigated nor adequately reflected by the actors themselves. The results of the work thus make an important contribution to the analysis of the beginnings the energy transition. [German] Die Energiewirtschaft hat in den vergangenen knapp 50 Jahren einen fundamentalen Transformationsprozess durchlaufen. Hendrik Ehrhardt untersucht in dieser Studie die Anfaenge und Herausforderungen dieses Prozesses seit den 1970er Jahren anhand bisher nicht ausgewerteter Unternehmens- und Verbandsquellen. Fuer die Bereiche Energiebedarf, Industrie sowie Umwelt und Oeffentlichkeit analysiert er das Handeln der Stromwirtschaft, das sich seit den 1970er Jahren zwischen Beharrungsvermoegen und Veraenderungsdruck bewegte. Welche Entscheidungsspielraeume hatten die Unternehmen in diesen drei Bereichen? Wie formte das Handeln der Energieversorger das deutsche Energiesystem? Und wie veraenderte deren Handeln ihr Bild in der Oeffentlichkeit? Diese Fragen nach dem Wandel in der Energiewirtschaft wurden bisher weder wissenschaftlich hinreichend untersucht, noch von den Akteuren selbst ausreichend reflektiert. Die Ergebnisse der Arbeit leisten damit einen wichtigen Beitrag zur Analyse der Anfaenge der Energiewende.

Experimental dem Extraction from Aster Stereo Pairs and 3d Registration Based on Icesat Laser Altimetry Data in Upstream Area of Lambert Glacier, Antarctica

Science.gov (United States)

Hai, G.; Xie, H.; Chen, J.; Chen, L.; Li, R.; Tong, X.

2017-09-01

DEM Extraction from ASTER stereo pairs and three-dimensional registration by reference to ICESat laser altimetry data are carried out in upstream area of Lambert Glacier, East Antarctica. Since the study area is located in inland of East Antarctica where few textures exist, registration between DEM and ICESat data is performed. Firstly, the ASTER DEM generation is based on rational function model (RFM) and the procedure includes: a) rational polynomial coefficient (RPC) computation from ASTER metadata, b) L1A image product de-noise and destriping, c) local histogram equalization and matching, d) artificial collection of tie points and bundle adjustment, and e) coarse-to-fine hierarchical matching of five levels and grid matching. The matching results are filtered semi-automatically. Hereafter, DEM is interpolated using spline method with ground points converted from matching points. Secondly, the generated ASTER DEM is registered to ICESat data in three-dimensional space after Least-squares rigid transformation using singular value decomposition (SVD). The process is stated as: a) correspondence selection of terrain feature points from ICESat and DEM profiles, b) rigid transformation of generated ASTER DEM using selected feature correspondences based on least squares technique. The registration shows a good result that the elevation difference between DEM and ICESat data is low with a mean value less than 2 meters and the standard deviation around 7 meters. This DEM is generated and specially registered in Antarctic typical region without obvious ground rock control points and serves as true terrain input for further radar altimetry simulation.

Dissipation consistent fabric tensor definition from DEM to continuum for granular media

Science.gov (United States)

Li, X. S.; Dafalias, Y. F.

2015-05-01

In elastoplastic soil models aimed at capturing the impact of fabric anisotropy, a necessary ingredient is a measure of anisotropic fabric in the form of an evolving tensor. While it is possible to formulate such a fabric tensor based on indirect phenomenological observations at the continuum level, it is more effective and insightful to have the tensor defined first based on direct particle level microstructural observations and subsequently deduce a corresponding continuum definition. A practical means able to provide such observations, at least in the context of fabric evolution mechanisms, is the discrete element method (DEM). Some DEM defined fabric tensors such as the one based on the statistics of interparticle contact normals have already gained widespread acceptance as a quantitative measure of fabric anisotropy among researchers of granular material behavior. On the other hand, a fabric tensor in continuum elastoplastic modeling has been treated as a tensor-valued internal variable whose evolution must be properly linked to physical dissipation. Accordingly, the adaptation of a DEM fabric tensor definition to a continuum constitutive modeling theory must be thermodynamically consistent in regards to dissipation mechanisms. The present paper addresses this issue in detail, brings up possible pitfalls if such consistency is violated and proposes remedies and guidelines for such adaptation within a recently developed Anisotropic Critical State Theory (ACST) for granular materials.

High-resolution DEMs for High-mountain Asia: A systematic, region-wide assessment of geodetic glacier mass balance and dynamics

Science.gov (United States)

Shean, D. E.; Arendt, A. A.; Osmanoglu, B.; Montesano, P.

2017-12-01

High Mountain Asia (HMA) constitutes the largest glacierized region outside of the Earth's polar regions. Although available observations are limited, long-term records indicate sustained regional glacier mass loss since 1850, with increased loss in recent decades. Recent satellite data (e.g., GRACE, ICESat-1) show spatially variable glacier mass balance, with significant mass loss in the Himalaya and Hindu Kush and slight mass gain in the Karakoram. We generated 4000 high-resolution digital elevation models (DEMs) from sub-meter commercial stereo imagery (DigitalGlobe WorldView/GeoEye) acquired over glaciers in High-mountain Asia from 2002-present (mostly 2013-present). We produced a regional 8-m DEM mosaic for 2015 and estimated 15-year geodetic mass balance for 40000 glaciers larger than 0.1 km2. We are combining with other regional DEM sources to systematically document the spatiotemporal evolution of glacier mass balance for the entire HMA region. We also generated monthly to interannual DEM and velocity time series for high-priority sites distributed across the region, with >15-20 DEMs available for some locations from 2010-present. These records document glacier dynamics, seasonal snow accumulation/redistribution, and processes that affect glacier mass balance (e.g., ice-cliff retreat, debris cover evolution). These efforts will provide basin-scale assessments of snow/ice melt runoff contributions for model cal/val and downstream water resources applications. We will continue processing all archived and newly available commercial stereo imagery for HMA, and will release all DEMs through the HiMAT DAAC.

CFD-DEM Onset of Motion Analysis for Application to Bed Scour Risk Assessment

Energy Technology Data Exchange (ETDEWEB)

Sitek, M. A. [Argonne National Lab. (ANL), Argonne, IL (United States); Lottes, S. A. [Argonne National Lab. (ANL), Argonne, IL (United States)

2017-03-01

This CFD study with DEM was done as a part of the Federal Highway Administration’s (FHWA’s) effort to improve scour design procedures. The Computational Fluid Dynamics-Discrete Element Method (CFD-DEM) model, available in CD-Adapco’s StarCCM+ software, was used to simulate multiphase systems, mainly those which combine fluids and solids. In this method the motion of discrete solids is accounted for by DEM, which applies Newton's laws of motion to every particle. The flow of the fluid is determined by the local averaged Navier–Stokes equations that can be solved using the traditional CFD approach. The interactions between the fluid phase and solids phase are modeled by use of Newton's third law. The inter-particle contact forces are included in the equations of motion. Soft-particle formulation is used, which allows particles to overlap. In this study DEM was used to model separate sediment grains and spherical particles laying on the bed with the aim to analyze their movement due to flow conditions. Critical shear stress causing the incipient movement of the sediment was established and compared to the available experimental data. An example of scour around a cylindrical pier is considered. Various depths of the scoured bed and flow conditions were taken into account to gain a better understanding of the erosion forces existing around bridge foundations. The decay of these forces with increasing scour depth was quantified with a ‘decay function’, which shows that particles become increasingly less likely to be set in motion by flow forces as a scour hole increases in depth. Computational and experimental examples of the scoured bed around a cylindrical pier are presented.

Comparison of elevation derived from insar data with dem from topography map in Son Dong, Bac Giang, Viet Nam

Science.gov (United States)

Nguyen, Duy

2012-07-01

Digital Elevation Models (DEMs) are used in many applications in the context of earth sciences such as in topographic mapping, environmental modeling, rainfall-runoff studies, landslide hazard zonation, seismic source modeling, etc. During the last years multitude of scientific applications of Synthetic Aperture Radar Interferometry (InSAR) techniques have evolved. It has been shown that InSAR is an established technique of generating high quality DEMs from space borne and airborne data, and that it has advantages over other methods for the generation of large area DEM. However, the processing of InSAR data is still a challenging task. This paper describes InSAR operational steps and processing chain for DEM generation from Single Look Complex (SLC) SAR data and compare a satellite SAR estimate of surface elevation with a digital elevation model (DEM) from Topography map. The operational steps are performed in three major stages: Data Search, Data Processing, and product Validation. The Data processing stage is further divided into five steps of Data Pre-Processing, Co-registration, Interferogram generation, Phase unwrapping, and Geocoding. The Data processing steps have been tested with ERS 1/2 data using Delft Object-oriented Interferometric (DORIS) InSAR processing software. Results of the outcome of the application of the described processing steps to real data set are presented.

Connecting bars between the loadhook and the elevator of a drilling linkage. Verbindungsstangen zwischen dem Lasthaken und dem Elevator eines Bohrgestaenges

Energy Technology Data Exchange (ETDEWEB)

Ulbrich, J.

1981-07-30

The invention concerns connecting bars between the loadhook and the elevator of a drilling linkage, with eyes provided at the ends of each bar. Such connecting bars are used in pairs on the loadhooks of drilling towers to suspend the ''elevator'' as socalled ''elevator brackets''.

Study of the electrooxidation of ethanol on hydrophobic electrodes by DEMS and HPLC

International Nuclear Information System (INIS)

Gonzalez Pereira, M.; Davila Jimenez, M.; Elizalde, M.P.; Manzo-Robledo, A.; Alonso-Vante, N.

2004-01-01

The electrochemical oxidation of ethanol in alkaline solution has been studied on Cu-PVC electrode and Ni/Cu-PVC composite electrodes modified by ruthenium nanoparticles. The techniques used were cyclic voltammetry (CV), steady-state potentiostatic method, on line differential electrochemical mass spectrometry (DEMS), and high-performance liquid chromatography (HPLC). The chemical products: acetaldehyde and acetic acid were detected measuring the proper mass charge (m/z) ratios. These products were also confirmed by HPLC. The surface modification of composite electrodes by ruthenium nanoparticles promotes the formation of acetaldehyde. As shown by DEMS, the surface modification shifts the onset potential for oxygen evolution reaction on the Cu-PVC composite electrode towards more anodic values

Study of the electrooxidation of ethanol on hydrophobic electrodes by DEMS and HPLC

Energy Technology Data Exchange (ETDEWEB)

Gonzalez Pereira, M.; Davila Jimenez, M.; Elizalde, M.P.; Manzo-Robledo, A.; Alonso-Vante, N

2004-09-15

The electrochemical oxidation of ethanol in alkaline solution has been studied on Cu-PVC electrode and Ni/Cu-PVC composite electrodes modified by ruthenium nanoparticles. The techniques used were cyclic voltammetry (CV), steady-state potentiostatic method, on line differential electrochemical mass spectrometry (DEMS), and high-performance liquid chromatography (HPLC). The chemical products: acetaldehyde and acetic acid were detected measuring the proper mass charge (m/z) ratios. These products were also confirmed by HPLC. The surface modification of composite electrodes by ruthenium nanoparticles promotes the formation of acetaldehyde. As shown by DEMS, the surface modification shifts the onset potential for oxygen evolution reaction on the Cu-PVC composite electrode towards more anodic values.

Hinkelbeinchen und "little chicken's leg": deutsche und amerikanische Idiome als kommunikative Textsorten-Problematik

Directory of Open Access Journals (Sweden)

Martin Wierschin

1998-12-01

Full Text Available Als Marin Luther 1522 seine Übersetzung des Neuen Testaments nach der griechischen Edition des Erasmus von Rotterdam abschloß, hatte er dabei zwar mit größtem Sprachgefühl nicht nur dem deutschen, sondem auch dem idiomatischen 'logos' des Griechischen "auf das Maul" gesehen. Aber er mußte in seinem "Sendbrief vom Dolmetschen" 1530 dennoch zugeben, daß selbst er - zusammen mit seinen beiden Assistenten Melanchthon und Aurogallus - sehr oft zwei bis vier Wochen lang nach einem einzigen idiomatisch treffenden Wort zu suchen hatte. Damit wird von einem eminenten Kronzeugen, nämlich vom Schöpfer des protestantischen 'Hausbuches' Lutherbibel und vom eigentlichen Begründer einer einheitlichen deutschen Schrift­ sprache, samt ihrer sprach- und literargeschichtlich wirkungsmächtigen Idiomatik, die Schwierigkeit und Problematik idiomatischer Äquivalenzen und Transferenzen zwischen den Einzelsprachen verbürgt.

BRS Deméter: nova cultivar de cevada cervejeira irrigada para o Cerrado do Brasil Central BRS Deméter: new malting barley cultivar for irrigated Brazilian savanna

Directory of Open Access Journals (Sweden)

Renato Fernando Amabile

2008-09-01

Full Text Available BRS Deméter é uma cultivar de cevada dística (duas fileiras de grãos de ampla adaptação, sob irrigação, ao Cerrado do Brasil Central. Apresenta potencial produtivo de grãos acima de 5.000 kg ha-1, estabilidade de produção e alta qualidade industrial malte-cervejeira. A cultivar atende às demandas do produtor por rendimento competitivo e às da indústria malteira por alta qualidade cervejeira.BRS Deméter is a spring, two-rowed barley, widely adapted to irrigated areas of the savanna, in Central Brazil. It presents production stability and high malting quality, with yield potential above 5,000 kg ha-1. It fulfills both the farmer and malting industry expectations regarding competitive yield and brewing quality.

BOREAS HYD-8 DEM Data Over the NSA-MSA and SSA-MSA in the UTM Projection

Science.gov (United States)

Wang, Xue-Wen; Hall, Forrest G. (Editor); Knapp, David E. (Editor); Band, L. E.; Smith, David E. (Technical Monitor)

2000-01-01

The BOREAS HYD-8 team focused on describing the scaling behavior of water and carbon flux processes at local and regional scales. These DEMs were produced from digitized contours at a cell resolution of 100 meters. Vector contours of the area were used as input to a software package that interpolates between contours to create a DEM representing the terrain surface. The vector contours had a contour interval of 25 feet. The data cover the BOREAS MSAs of the SSA and NSA and are given in a UTM map projection. Most of the elevation data from which the DEM was produced were collected in the 1970s or 1980s. The data are stored in binary, image format files. The data files are available on a CD-ROM (see document number 20010000884) or from the Oak Ridge National Laboratory (ORNL) Distributed Active Archive Center (DAAC).

DEM GENERATION FROM HIGH RESOLUTION SATELLITE IMAGES THROUGH A NEW 3D LEAST SQUARES MATCHING ALGORITHM

Directory of Open Access Journals (Sweden)

T. Kim

2012-09-01

Full Text Available Automated generation of digital elevation models (DEMs from high resolution satellite images (HRSIs has been an active research topic for many years. However, stereo matching of HRSIs, in particular based on image-space search, is still difficult due to occlusions and building facades within them. Object-space matching schemes, proposed to overcome these problem, often are very time consuming and critical to the dimensions of voxels. In this paper, we tried a new least square matching (LSM algorithm that works in a 3D object space. The algorithm starts with an initial height value on one location of the object space. From this 3D point, the left and right image points are projected. The true height is calculated by iterative least squares estimation based on the grey level differences between the left and right patches centred on the projected left and right points. We tested the 3D LSM to the Worldview images over 'Terrassa Sud' provided by the ISPRS WG I/4. We also compared the performance of the 3D LSM with the correlation matching based on 2D image space and the correlation matching based on 3D object space. The accuracy of the DEM from each method was analysed against the ground truth. Test results showed that 3D LSM offers more accurate DEMs over the conventional matching algorithms. Results also showed that 3D LSM is sensitive to the accuracy of initial height value to start the estimation. We combined the 3D COM and 3D LSM for accurate and robust DEM generation from HRSIs. The major contribution of this paper is that we proposed and validated that LSM can be applied to object space and that the combination of 3D correlation and 3D LSM can be a good solution for automated DEM generation from HRSIs.

El ambiente y la disciplina escolar desde el conductismo y el constructivismo

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Mario Segura Castillo

2005-01-01

Full Text Available El propósito del presente artículo es realizar un análisis comparativo entre algunos elementos del conductismo y el constructivismo. Es necesario demostrar la inconmensurabilidad paradigmática y desmentir las posiciones eclécticas como los supuestos filosóficos de la actual Política Educativa en Costa Rica (1995, las cuales consideran que los docentes en el ambiente y en el manejo de la disciplina escolar deben utilizar, simultáneamente, tanto el conductismo como el constructivismo. Desde las preguntas básicas de la educación, qué, cómo y para qué, surge una serie de supuestos de reflexión, con la finalidad de realizar una comparación entre ambas concepciones: - El papel del ambiente. - El manejo de la disciplina. En el reglamento de conducta vigente, cuando un estudiante comete una falta, se le aplican automáticamente acciones correctivas y se le hace un rebajo de puntos en tal calificación. Por lo que se pretende demostrar con el presente artículo que esto representa un resabio del conductismo clásico. En el constructivismo, la disciplina escolar se va construyendo por medio de la reflexión, el diálogo y los principios de que son los propios estudiantes quienes deben asumir sus responsabilidades consigo mismos y con los demás miembros de la comunidad estudiantil.

Influence of different DEMs on the quality of the InSAR results: case study over Bankya and Mirovo areas

Science.gov (United States)

Nikolov, Hristo; Atanasova, Mila

2017-10-01

One of the key input parameters in obtaining end products from SAR data is the DEM used during their processing. This holds true especially when persistent scatterers InSAR method should be applied for example to study slow moving landslides or subsidence. Since nowadays most of the raw SAR data are of space borne origin for their correct processing to high precision products for relatively small areas with centimeter accuracy a DEM taking into account the particularities of the local topography is needed. Most of the DEMs used by the SAR processing software such as SRTM or ASTER are obtained by the same type of instrument and present some disagreements with height information acquired by leveling measurements or other geodetic means. This was the motivation for initiating this research - to prove the need of creating and using local DEM in SAR data processing at small scale and to check what the magnitude of the discrepancy between final InSAR products is in both cases where SRTM/ASTER and local DEM has been used. In addition investigated were two scenarios for SAR data processing - one with small baseline between image pairs and one having large baseline image pairs - in order to find out in which case local DEM has bigger impact. In course of this study two reference areas were considered - Bankya village near Sofia (SW region of Bulgaria) and Mirovo salt extraction site (NE region of Bulgaria). The reason those areas were selected lies in the high number of landslides registered and monitored by the competent authorities in the mentioned locations. The significance of the results obtained is witnessed by the fact that both sites we used have been included as reference sites for Bulgaria in the PanGeo EU funded project dealing with delivering information regarding ground instability geohazard as areas prone to subsidence of natural and manmade origin. In the said project largest part of the information has been extracted from Envisat SAR data, but now this

Carry-over of plant protection agents through wet deposition on the Kleine Feldberg/Taunus; Eintrag von Pflanzenschutzmitteln durch nasse Deposition auf dem Kleinen Feldberg/Taunus

Energy Technology Data Exchange (ETDEWEB)

Gath, B. [Zentrum fuer Umweltforschung der Johann Wolfgang Goethe-Universitaet, Frankfurt am Main (Germany); Jaeschke, W. [Zentrum fuer Umweltforschung der Johann Wolfgang Goethe-Universitaet, Frankfurt am Main (Germany); Kubiak, R. [Landes-Lehr- und Forschungsanstalt fuer Landwirtschaft, Weinbau und Gartenbau, Neustadt an der Weinstrasse (Germany); Ricker, I. [Battelle Europe Battelle-Institut e.V., Frankfurt am Main (Germany); Schmider, F. [BASF AG, Landwirtschaftliche Versuchsstation, Limburgerhof (Germany); Zietz, E. [Battelle Europe Battelle-Institut e.V., Frankfurt am Main (Germany)

1993-11-01

On the Feldberg and at two more sites precipitation samples were taken and analysed for selected pesticides (Lindan, Isoproturon, Triadimenol, Pirimicarb, Parathion-ethyl and atrazine). Bulk samplers (acc. to Daemmgen) were used in 14-day intervals. At two stations wet-only samplers were used in addition to the bulk samplers. Parathion-ethyl, Pirimicarb and Triadimenol were only found in single cases only. Distinct annual curves could be established for atrazin and isoproturon, they are shown in desposition charts. Only Lindan was detectable all year round. Concentrations were between 3 and 300 ng l{sup {minus}1}. Annual curves show good correlation with application periods of the individual substances. In general the annual mean value of the concentrations are below 50 ng l{sup {minus}1}. The share of dry deposition depends on substance and weather and account roughly for 10-20% of total deposition. (orig./EW) [Deutsch] Auf dem Feldberg sowie an zwei weiteren Messstandorten wurden parallel Niederschlagsproben genommen und auf ausgewaehlte Pestizide (Lindan, Isoproturon, Triadimenol, Pirimicarb, Parathion-ethyl und Atrazin) untersucht. Die Probenahme erfolgte in bulk-Sammlern nach Daemmgen in 14-Tage Intervallen. An zwei Stationen wurden parallel zu den bulk-Sammlern auch wet-only Sammler betrieben. Parathion-ethyl, Pirimicarb und Triadimenol konnten nur vereinzelt nachgewiesen werden. Von Atrazin und Isoproturon wurden ausgepraegte Jahresgaenge ermittelt und in Depositionsgraphiken dargestellt. Lediglich Lindan war nahezu das ganze Jahr ueber nachweisbar. Die gemessenen Konzentrationen lagen zwischen 3 und 300 ng 1{sup -1}. Die dargestellten Jahresgaenge korrelieren gut mit den jeweiligen Anwendungszeitraeumen der einzelnen Substanzen. Insgesamt liegen die gemessenen Konzentrationen im Jahresmittel unter 50 ngl{sup -1}. Der Beitrag der trockenen Deposition ist substanz- und wetterabhaengig und macht etwa 10-20% der Gesamtdeposition aus. (orig.)

Wilhelmo von Humboldto pažiūra į kalbą ir kalbos kilmės klausimas

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Bernfried Schlerath

2011-10-01

Full Text Available WILHELM VON HUMBOLDTS ANSICHT VON DER SPRACHE UND DIE FRAGE DER SPRACHENTSTEHUNG Zusammenfassung 1. Nach W. von Humboldt verfügen alle Sprachen über die gleichen Möglichkeiten. Es gibt keine Zwischenstufe zwischen Sprache und Nicht-Sprache. 2. Daraus folgt, daß Menschensprache sich nicht allmählich entwickelt haben kann. Sprechenkönnen ist eine plötzliche Entdeckung. 3. Der Unterschied zwischen nichtsprachlicher Kommunikation und Menschenspra­che ergibt sich aus der Reflexionsfähigkeit des Menschen. 4. Die Ursache der Sprachentstehung kann nicht die Notwendigkeit gegenseitiger Hilfeleistung und auch keine andere Notsituation gewesen sein. In der Bedrängnis ver­liert der Mensch im Gegenteil die Sprache. 5. Reflexion setzt das Ausklinken aus der Synchronie einer gegebenen Situation vo­raus. Vergangenes wird festgehalten, Zukünftiges imaginiert. Das ist zunächst eine Ent­deckung, ein Spiel, wie alle kulturellen Errungenschaften. 6. Die akustischen Elemente der tierischen Kommunikation beziehen sich stets auf das Hier und Jetzt. Nach dem Erringen der Möglichkeit der Reflexion können sie aus dieser Bindung gelöst werden. 7. Deshald gibt es nur in der Menschensprache ein Zeigfeld, Wörter, die zur Raum- und Zeitorientierung dienen. In Keiner „Tiersprache“ gibt es Zeichen für „dort“ oder „gestern“. 8. Zugleich mit der Möglichkeit, sich aus der Situation zu lösen, erwirbt der Mensch die Zeigegebärde, die dem Tier verschlossen ist. Die Gedanken 6. –8. finden sich nicht bei Humboldt.

The new drive design (direct drive) for the main drives of the large excavators 3150 and 3750 at the LAUBAG; Das neue Antriebskonzept (Direktantrieb) an den Hauptantrieben der Grossbagger 3150/3750 in der LAUBAG

Energy Technology Data Exchange (ETDEWEB)

Daus, W [LAUBAG, Senftenberg (Germany); Hartmann, K [Siemens AG, Erlangen (Germany). Bereich Tagebauanlagen; Leuschner, F [FAM Buckau GmbH, Magdeburg (Germany)

1996-09-01

In the case of subtransient processes between the batter (stones, foreign bodies, frost) and the digging element, mechanical force effects occur as a result of the mass forces of inertia and cause increased wear on the digging element and supporting structure. These force effects cannot be further reduced by means of the mechanical solutions applied hitherto. The direct drive as a solution in this case will, above all, be further optimized in future in so far as the specification of parameters for the technical control system and practical tests to detect mechanical wear (on chains, running and sliding rails, shafts) are concerned. Problems encountered so far as regards adjustment between the direct drive with its new control characteristics and the rest of the programmed control system of the excavator occurred briefly when parameters were optimized in order to adapt the entire system of the excavator to operating requirements and specific mining conditions. (orig./HS) [Deutsch] Bei subtransienten Vorgaengen zwischen der Boeschung (Steine, Fremdkoerper, Frost) und dem Graborgan entstehen auf Grund der Traegheitsmassen mechanische Kraftwirkungen, die sich verschleissintensivierend auf Graborgan und Tragwerk auswirken. Diese Kraftwirkungen koennen mit den bisherigen mechanischen Loesungen nicht weiter verringert werden. Der Direktantrieb als Ausweg aus dieser Situation wird in Zukunft vorrangig aus der Sicht der Parametrierung technischer Regelungssysteme und der praktischen Versuche zum mechanischen Verschleiss (Ketten, Lauf- und Gleitschienen, Wellen) weiter optimiert werden. Bisher erkannte Probleme der Anpassung zwischen dem Direktantrieb mit seiner neuen Regelcharakteristik und der uebrigen Baggerprogrammsteuerung erfolgten kurzfristig durch Parameteroptimierung zur Anpassung des Gesamtsystems Bagger an die Betriebserfordernisse und spezielle Abbaubedingungen. (orig./HS)

Modeling bubble heat transfer in gas-solid fluidized beds using DEM

NARCIS (Netherlands)

Patil, A.V.; Peters, E.A.J.F.; Kolkman, T.; Kuipers, J.A.M.

2014-01-01

Discrete element method (DEM) simulations of a pseudo 2-D fluidized bed at non-isothermal conditions are presented. First implementation details are discussed. This is followed by a validation study where heating of a packed column by a flow of heated fluid is considered. Next hot gas injected into

Der antiskeptische Boden unter dem Gehirn im Tank

OpenAIRE

Müller, Olaf L.

2001-01-01

Crispin Wright hat die bislang beste Rekonstruktion von Putnams Beweis gegen die skeptische Hypothese vom Gehirn im Tank vorgelegt. Aber selbst in Wrights Fassung hat der Beweis einen Mangel: Er wird mithilfe eines Prädikates wie z.B. "Tiger" geführt und funktioniert nur, wenn man sich darauf verlassen kann, dass es Tiger wirklich gibt. Aber die Skeptikerin bestreitet, über die Existenz von Tigern bescheid zu wissen. Das Problem lässt sich dadurch beheben, dass man den Beweis – statt mit dem ...

Multi-scale sensitivity analysis of pile installation using DEM

Science.gov (United States)

Esposito, Ricardo Gurevitz; Velloso, Raquel Quadros; , Eurípedes do Amaral Vargas, Jr.; Danziger, Bernadete Ragoni

2017-12-01

The disturbances experienced by the soil due to the pile installation and dynamic soil-structure interaction still present major challenges to foundation engineers. These phenomena exhibit complex behaviors, difficult to measure in physical tests and to reproduce in numerical models. Due to the simplified approach used by the discrete element method (DEM) to simulate large deformations and nonlinear stress-dilatancy behavior of granular soils, the DEM consists of an excellent tool to investigate these processes. This study presents a sensitivity analysis of the effects of introducing a single pile using the PFC2D software developed by Itasca Co. The different scales investigated in these simulations include point and shaft resistance, alterations in porosity and stress fields and particles displacement. Several simulations were conducted in order to investigate the effects of different numerical approaches showing indications that the method of installation and particle rotation could influence greatly in the conditions around the numerical pile. Minor effects were also noted due to change in penetration velocity and pile-soil friction. The difference in behavior of a moving and a stationary pile shows good qualitative agreement with previous experimental results indicating the necessity of realizing a force equilibrium process prior to any load-test to be simulated.

Periodismo ambiental

Directory of Open Access Journals (Sweden)

Lucía Lemos

2015-01-01

Full Text Available Los periodistas toman el tema del medio ambiente cada vez más en serio. El uso de temas relacionados con el medio ambiente, debe estar ligado al análisis socio-económico y a las posibilidades de comunicación y educación de diferentes regiones del mundo. A continuación se presenta un resumen de la situación ambiental, las acciones de prensa y comunicación que se llevan a cabo en América Central (Panamá, El Salvador, Costa Rica y en Sudamérica Brasil,Colombia, Chile, México, y Perú. Se concluye en la necesidad de formar hábitos ecológicos. Los comunicadores deben presentar soluciones a los problemas, fomentar campañas comunes, compartir información y velar por el ambiente ambiente para que las generaciones futuras no tengan que perecer.

Fracking in the conflict area between energy and environmental policy. The discussion in Germany and the Netherlands by comparison; Fracking im Spannungsfeld zwischen Energie- und Umweltpolitik. Die Diskussion in Deutschland und den Niederlanden im Vergleich

Energy Technology Data Exchange (ETDEWEB)

Kontny, Kerstin

2016-11-01

The shale gas production using the so-called fracking method represents for opponents the use of a high-risk technology. Proponents see it, however a technological advance, and the answer to current energy issues. For the citizens of a country, the debate involves mainly uncertainties, the technology is still associated with risks that are not only difficult to assess for the layman. Due to these uncertainties, there is a danger that scientific evidence for political purposes are exploited. Particularly exciting is therefore the question of how the subject is discussed in different countries. In Fracking in the conflict area between energy and environmental policies are the debates in natural gas country Netherlands and the country of energy transition, Germany are compared. Kerstin Kontry's research put emphasis on the parties to the debate actors, the course of the debate and the issues are discussed. The main question is to what extent the discussions are shaped by national factors. [German] Die Schiefergasfoerderung mit Hilfe der sogenannten Fracking-Methode stellt fuer Gegner die Anwendung einer Hochrisikotechnologie dar, Befuerworter sehen darin hingegen einen technologischen Fortschritt und die Antwort auf derzeitige Energiefragen. Fuer die Buerger eines Landes birgt die Debatte vor allem Unsicherheiten, ist die Technologie doch mit Risiken verbunden, die nicht nur fuer den Laien schwer einzuschaetzen sind. Aufgrund dieser Unsicherheiten droht die Gefahr, dass wissenschaftliche Erkenntnisse fuer politische Zwecke instrumentalisiert werden. Besonders spannend ist daher die Frage, wie die Thematik in unterschiedlichen Laendern diskutiert wird. In Fracking im Spannungsfeld zwischen Energie- und Umweltpolitik werden die Debatten im Erdgasland Niederlande und dem Land der Energiewende, Deutschland, verglichen. Den Schwerpunkt legt Kerstin Kontny dabei auf die an der Debatte beteiligten Akteure, den Verlauf der Debatte sowie die behandelten Themen. Dabei

Berufskrankheiten, die Schaffung am Subjekt und politische Arbeit im Talkshow-Format

Directory of Open Access Journals (Sweden)

Ruben Marc Hackler

2008-03-01

Full Text Available In ihrer Analyse der Sprecherpositionen, die subalternen Frauen in Indien zugestanden wird, formuliert Gayatri Chakravorty Spivak eine Kritik am fehlenden Verantwortungsbewusstsein westlicher Intellektueller. Zugleich entwickelt sie eine anspruchsvolle Vorgabe für die Untersuchung kolonialer Herrschaftspraktiken. Während die Forderung nach Verantwortung allerdings hinter dem eigenen Anspruch zurückbleibt, die institutionellen und historischen Bedingungen akademischer Arbeit zu berücksichtigen, birgt ihre Theorie des unterworfenen Subjektes ein großes Analysepotential. Das Gespräch zwischen Spivak und Judith Butler enttäuscht hingegen die Erwartungen an eine informierte politische Öffentlichkeit.

Klimaänderung und die Vorverlegung des Brutbeginns beim Kiebitz (Vanellus vanellus) : 33-jährige phänologische Beobachtungen (1976-2008)

OpenAIRE

Kooiker, Gerhard

2011-01-01

Zwischen 1976 und 2008 stieg die Jahresdurchschnittstemperatur in Osnabrück um 1,3 °C dramatisch an. Die Erwärmung beschränkte sich im Wesentlichen auf das Winterhalbjahr. In den für Kiebitze relevanten Monaten der Ankunft, Vorbrut- und Brutphase (Februar, März, April) stiegen die über diesen Zeitraum gemittelten Temperaturen sogar um 2,0 °C an (1976 = 4,4 °C, 2008 = 6,4 °C). Das bedeutet eine jährliche Steigerung um 0,06 °C! In dem zugrundeliegenden 33-jährigen Zeitraum hat sich die Brutperi...

Satisfação sexual na demência Sexual satisfaction in dementia

Directory of Open Access Journals (Sweden)

Marcela Moreira Lima Nogueira

2013-01-01

Full Text Available CONTEXTO: A demência pode resultar em comprometimento da intimidade e sexualidade de casais idosos. OBJETIVOS: Avaliar alterações na atividade sexual, bem como os fatores de satisfação e/ou insatisfação sexual de casais nos quais um dos parceiros possua demência. MÉTODO: Busca nas bases de dados ISI, PubMed/Medline e SciELO de artigos sobre sexualidade na demência, entre janeiro de 1990 e março de 2012, utilizando as palavras-chave: "demência", "satisfação sexual", "intimidade" e "sexualidade". RESULTADOS: Foram encontrados 12 artigos. A sobrecarga de cuidados e a alteração de papéis na relação conjugal foram consideradas as principais causas para o declínio da atividade sexual. A disfunção erétil em pacientes e cônjuges, a capacidade decisória para o consentimento da relação sexual por parte do paciente demenciado e os problemas referentes à idade e à saúde (física e emocional do cônjuge e/ou paciente foram os fatores associados à insatisfação sexual. CONCLUSÃO: A intimidade e a atividade sexual dos casais em que um dos parceiros é portador de demência são influenciadas negativamente pela relação de cuidados decorrente da doença e pela sobrecarga dos cônjuges. Por outro lado, a atividade sexual pode ser positivamente substituída por demonstrações de carinho e empatia entre os cônjuges.BACKGROUND: Dementia may result on impairment in intimacy and sexuality of elderly couples. OBJECTIVES: Evaluate changes in sexual activity, as well as the factors which cause sexual satisfaction and/or dissatisfaction in couples in which one of the partners has dementia. METHOD: A search at ISI, PubMed/Medline and SciELO was made for articles about sexuality in dementia, from January 1990 to March 2012, using the keywords: "dementia", "sexual satisfaction", "intimacy" and "sexuality". RESULTS: Twelve articles were selected. The burden of care and the change of roles in couples' relationship were the main reasons for

Insight From the Statistics of Nothing: Estimating Limits of Change Detection Using Inferred No-Change Areas in DEM Difference Maps and Application to Landslide Hazard Studies

Science.gov (United States)

Haneberg, W. C.

2017-12-01

Remote characterization of new landslides or areas of ongoing movement using differences in high resolution digital elevation models (DEMs) created through time, for example before and after major rains or earthquakes, is an attractive proposition. In the case of large catastrophic landslides, changes may be apparent enough that simple subtraction suffices. In other cases, statistical noise can obscure landslide signatures and place practical limits on detection. In ideal cases on land, GPS surveys of representative areas at the time of DEM creation can quantify the inherent errors. In less-than-ideal terrestrial cases and virtually all submarine cases, it may be impractical or impossible to independently estimate the DEM errors. Examining DEM difference statistics for areas reasonably inferred to have no change, however, can provide insight into the limits of detectability. Data from inferred no-change areas of airborne LiDAR DEM difference maps of the 2014 Oso, Washington landslide and landslide-prone colluvium slopes along the Ohio River valley in northern Kentucky, show that DEM difference maps can have non-zero mean and slope dependent error components consistent with published studies of DEM errors. Statistical thresholds derived from DEM difference error and slope data can help to distinguish between DEM differences that are likely real—and which may indicate landsliding—from those that are likely spurious or irrelevant. This presentation describes and compares two different approaches, one based upon a heuristic assumption about the proportion of the study area likely covered by new landslides and another based upon the amount of change necessary to ensure difference at a specified level of probability.

Las actividades en el área de producción de alimentos y su incidencia en el medio ambiente

Directory of Open Access Journals (Sweden)

Bertha E. Rivas A.

2006-11-01

Full Text Available El turismo como fenómeno social y múltiple abarca diversas actividades, y algunas de ellas con impacto en el medio ambiente. En esas actividades está la hotelera con su infraestructura está la hotelera con su infraestructura investigación tiene como objetivo establecer en qué medida los hoteles venezolanos contribuyen estudio es de naturaleza teórico-práctica. Se analizaron tres hoteles capitalinos a través del instrumento de inspección sanitaria, diseñado por el Ministerio de Salud y Desarrollo Social (1980, que determina el porcentaje de efectividad en deméritos. Los resultados arrojaron un 60.49% de efectividad promedio. La principal conclusión es que no se observaron acciones tácitamente expresas para contrarrestar el impacto que se realizan en el área de producción de alimentos, donde un problema importante es el referido al personal que en él labora y que requiere de talleres de inducción por parte de la gerencia del hotel para sensibilizarlos sobre la problemática ambiental.

Improving low-relief coastal LiDAR DEMs with hydro-conditioning of fine-scale and artificial drainages

Directory of Open Access Journals (Sweden)

Thomas Richard Allen

2015-11-01

Full Text Available Improvements in Light Detection and Ranging (LiDAR technology and spatial analysis of high-resolution digital elevation models (DEMs have advanced the accuracy and diversity of applications for coastal hazards and natural resources management. This article presents a concise synthesis of LiDAR analysis for coastal flooding and management applications in low-relief coastal plains and a case study demonstration of a new, efficient drainage mapping algorithm. The impetus for these LiDAR applications follows historic flooding from Hurricane Floyd in 1999, after which the State of North Carolina and the Federal Emergency Management Agency undertook extensive LiDAR data acquisition and technological developments for high-resolution floodplain mapping. An efficient algorithm is outlined for hydro-conditioning bare earth LiDAR DEMs using available US Geological Survey National Hydrography Dataset canal and ditch vectors. The methodology is illustrated in Moyock, North Carolina, for refinement of hydro-conditioning by combines pre-existing bare earth DEMs with spatial analysis of LiDAR point clouds in segmented and buffered ditch and canal networks. The methodology produces improved maps of fine-scale drainage, reduced omission of areal flood inundation, and subwatershed delineations that typify heavily ditched and canalled drainage areas. These preliminary results illustrate the capability of the technique to improve the representation of ditches in DEMs as well as subsequent flow and inundation modeling that could spur further research on low-relief coastal LiDAR applications.

Altautoverwertung zwischen Staat und Markt: Bedingungen und Potentiale zur Modernisierung von Lagerhaltung und Marketing gebrauchter Autoteile

OpenAIRE

Lucas, Rainer

2000-01-01

Das Arbeitspapier diskutiert vor dem Hintergrund veränderter gesetzlicher Rahmen-und Wettbewerbsbedingungen in der Autoverwertung Ziele und Maßnahmen zurStärkung kleiner und mittelständischer Verwertungsbetriebe. Der Bereich GebrauchteAutoteile wird im Rahmen eines regionalen Fallbeispiels einer tiefergehenden Analyseunterzogen. Hieraus werden Vorschläge zur regionalen Netzwerkbildung innerhalb derBranche und neue Dienstleistungsperspektiven abgeleitet. Ein wesentliches Koope-rationsfeld ist ...

Optimizing landslide susceptibility zonation: Effects of DEM spatial resolution and slope unit delineation on logistic regression models

Science.gov (United States)

Schlögel, R.; Marchesini, I.; Alvioli, M.; Reichenbach, P.; Rossi, M.; Malet, J.-P.

2018-01-01

We perform landslide susceptibility zonation with slope units using three digital elevation models (DEMs) of varying spatial resolution of the Ubaye Valley (South French Alps). In so doing, we applied a recently developed algorithm automating slope unit delineation, given a number of parameters, in order to optimize simultaneously the partitioning of the terrain and the performance of a logistic regression susceptibility model. The method allowed us to obtain optimal slope units for each available DEM spatial resolution. For each resolution, we studied the susceptibility model performance by analyzing in detail the relevance of the conditioning variables. The analysis is based on landslide morphology data, considering either the whole landslide or only the source area outline as inputs. The procedure allowed us to select the most useful information, in terms of DEM spatial resolution, thematic variables and landslide inventory, in order to obtain the most reliable slope unit-based landslide susceptibility assessment.

Effect of particle breakage on cyclic densification of ballast: A DEM approach

International Nuclear Information System (INIS)

Thakur, P K; Vinod, J S; Indraratna, B

2010-01-01

In this paper, an attempt has been made to investigate the effect of particle breakage on densification behaviour of ballast under cyclic loading using Discrete Element Method (DEM). Numerical simulations using PFC 2D have been carried out on an assembly of angular particles with and without incorporation of particle breakage. Two-dimensional projection of angular ballast particles were simulated using clusters of bonded circular particles. Degradation of the bonds within a cluster was considered to represent particle breakage. Clump logic was used to make the cluster of particles unbreakable. DEM simulation results highlight that the particle breakage has a profound influence on the cyclic densification behaviour of ballast. The deformation behaviour exhibited by the assembly with breakage is in good agreement with the laboratory experiments. In addition, the evolution of particle displacement vectors clearly explains the breakage mechanism and associated deformations during cyclic loading.

High Resolution Airborne InSAR DEM of Bagley Ice Valley, South-central Alaska: Geodetic Validation with Airborne Laser Altimeter Data

Science.gov (United States)

Muskett, R. R.; Lingle, C. S.; Echelmeyer, K. A.; Valentine, V. B.; Elsberg, D.

2001-12-01

Bagley Ice Valley, in the St. Elias and Chugach Mountains of south-central Alaska, is an integral part of the largest connected glacierized terrain on the North American continent. From the flow divide between Mt. Logan and Mt. St. Elias, Bagley Ice Valley flows west-northwest for some 90 km down a slope of less than 1o, at widths up to 15 km, to a saddle-gap where it turns south-west to become Bering Glacier. During 4-13 September 2000, an airborne survey of Bagley Ice Valley was performed by Intermap Technologies, Inc., using their Star-3i X-band SAR interferometer. The resulting digital elevation model (DEM) covers an area of 3243 km2. The DEM elevations are orthometric heights, in meters above the EGM96 geoid. The horizontal locations of the 10-m postings are with respect to the WGS84 ellipsoid. On 26 August 2000, 9 to 18 days prior to the Intermap Star-3i survey, a small-aircraft laser altimeter profile was acquired along the central flow line for validation. The laser altimeter data consists of elevations above the WGS84 ellipsoid and orthometric heights above GEOID99-Alaska. Assessment of the accuracy of the Intermap Star-3i DEM was made by comparison of both the DEM orthometric heights and elevations above the WGS84 ellipsoid with the laser altimeter data. Comparison of the orthometric heights showed an average difference of 5.4 +/- 1.0 m (DEM surface higher). Comparison of elevations above the WGS84 ellipsoid showed an average difference of -0.77 +/- 0.93 m (DEM surface lower). This indicates that the X-band Star-3i interferometer was penetrating the glacier surface by an expected small amount. The WGS84 comparison is well within the 3 m RMS accuracy quoted for GT-3 DEM products. Snow accumulation may have occurred, however, on Bagley Ice Valley between 26 August and 4-13 September 2000. This will be estimated using a mass balance model and used to correct the altimeter-derived surface heights. The new DEM of Bagley Ice Valley will provide a reference

Die semantische Ordnung der Dinge im Web. Bildung mit den HTTP-Dämonen zwischen Widerstreit und adaptiver Regelung

Directory of Open Access Journals (Sweden)

Christian Swertz

2015-06-01

Full Text Available Die zentrale These dieses Beitrags ist, dass das WWW im Interesse der Bildung des Menschen genutzt werden kann, eine solche Nutzung aber aus historischen Gründen eher selten ist. Der Beitrag entwickelt Gestaltungs- und Reflexionsoptionen im Interesse einer produktiven Rekombination von Services und des progressiven Designs der medialen Infrastruktur des WWW und empfiehlt eine solidarische Kooperation zwischen Informatik und Pädagogik, um eine reflektierte Gestaltung zu implementieren. The world wide web can be used for educating people, but this is hardly the case. The paper argues that this lack of education is connected to historical contexts and develops options to design and reflect the internet for education. The aim is to combine services of the world wide web and a progressive design of the infrastructure. Solidarity in the cooperation between computer sciences and education for a reflective design is suggested to put this aim into practice.

Risk and mitigation in the privately financed hydropower project Birecik, Turkey; Privat finanzierte Wasserkraft, Birecik, Tuerkei - Risiken und Risikoverteilung

Energy Technology Data Exchange (ETDEWEB)

Koselleck, F.; Ishay, D. [PH Ventures GmbH, Neu-Isenburg (Germany)

2003-07-01

The 627 MW Hydroelectric Power Plant Birecik, Turkey, is the largest privately financed hydropower project realized wordwide under a BOT (Build Operate Transfer) scheme. The total investment volume adds up to almost 1 Bll Euro. Ther financial structure of the project mostly relies on export credits, which have been arranged under an international consortium of 50 banks. A complex contractual structure between the government, the investors and the contractors succeeded in establishing a fair risk mitigation mechanism, which was a central factor for the overall success of the project. [German] Das 672 MW Wasserkraftwerk Birecik, Tuerkei, ist mit einem Investitionsvolumen von rund Euro 1 Mrd. das bisher weltweit groesste Wasserkraftprojekt, das nach dem BOT-Modell realisiert wurde. Die auf Exportkredite basierende Finanzierung wurde ueber ein internationales Konsortium von 50 Banken dargestellt. Eine komplexe Vertragsstruktur zwischen dem Staat, den Investoren und den Auftragsnehmern fuehrte zu einem ausgeglichenen Risikoverteilungsmechanismus, der ausschlaggebend fuer den Erfolg des Projektes war. (orig.)

DEM study of granular flow around blocks attached to inclined walls

Science.gov (United States)

Samsu, Joel; Zhou, Zongyan; Pinson, David; Chew, Sheng

2017-06-01

Damage due to intense particle-wall contact in industrial applications can cause severe problems in industries such as mineral processing, mining and metallurgy. Studying the flow dynamics and forces on containing walls can provide valuable feedback for equipment design and optimising operations to prolong the equipment lifetime. Therefore, solids flow-wall interaction phenomena, i.e. induced wall stress and particle flow patterns should be well understood. In this work, discrete element method (DEM) is used to study steady state granular flow in a gravity-fed hopper like geometry with blocks attached to an inclined wall. The effects of different geometries, e.g. different wall angles and spacing between blocks are studied by means of a 3D DEM slot model with periodic boundary conditions. The findings of this work include (i) flow analysis in terms of flow patterns and particle velocities, (ii) force distributions within the model geometry, and (iii) wall stress vs. model height diagrams. The model enables easy transfer of the key findings to other industrial applications handling granular materials.

DEM study of granular flow around blocks attached to inclined walls

Directory of Open Access Journals (Sweden)

Samsu Joel

2017-01-01

Full Text Available Damage due to intense particle-wall contact in industrial applications can cause severe problems in industries such as mineral processing, mining and metallurgy. Studying the flow dynamics and forces on containing walls can provide valuable feedback for equipment design and optimising operations to prolong the equipment lifetime. Therefore, solids flow-wall interaction phenomena, i.e. induced wall stress and particle flow patterns should be well understood. In this work, discrete element method (DEM is used to study steady state granular flow in a gravity-fed hopper like geometry with blocks attached to an inclined wall. The effects of different geometries, e.g. different wall angles and spacing between blocks are studied by means of a 3D DEM slot model with periodic boundary conditions. The findings of this work include (i flow analysis in terms of flow patterns and particle velocities, (ii force distributions within the model geometry, and (iii wall stress vs. model height diagrams. The model enables easy transfer of the key findings to other industrial applications handling granular materials.

Accuracy assessment of TanDEM-X IDEM using airborne LiDAR on the area of Poland

Directory of Open Access Journals (Sweden)

Woroszkiewicz Małgorzata

2017-06-01

Full Text Available The TerraSAR-X add-on for Digital Elevation Measurement (TanDEM-X mission launched in 2010 is another programme – after the Shuttle Radar Topography Mission (SRTM in 2000 – that uses space-borne radar interferometry to build a global digital surface model. This article presents the accuracy assessment of the TanDEM-X intermediate Digital Elevation Model (IDEM provided by the German Aerospace Center (DLR under the project “Accuracy assessment of a Digital Elevation Model based on TanDEM-X data” for the southwestern territory of Poland. The study area included: open terrain, urban terrain and forested terrain. Based on a set of 17,498 reference points acquired by airborne laser scanning, the mean errors of average heights and standard deviations were calculated for areas with a terrain slope below 2 degrees, between 2 and 6 degrees and above 6 degrees. The absolute accuracy of the IDEM data for the analysed area, expressed as a root mean square error (Total RMSE, was 0.77 m.

Das Passepartout und der Zwischenraum zwischen den Sternen: Thomas Ruff – Ein Ausstellungsrundgang um ein Projekt der Annäherung!

Directory of Open Access Journals (Sweden)

Jürgen Stöhr

2013-07-01

Full Text Available Bildbetrachtung und insbesondere die Anschauung von Kunstwerken bedürfen einer näher zu bestimmenden «visuellen Kompetenz». Je nach methodologischer Ausrichtung wird diese Kompetenz eher als bildexternes historisch-kontextuelles Fachwissen oder eher bildimmanent als Fähigkeit zum «Lesen» oder zur «ästhetischen Erfahrung» von Einzelwerken angesetzt. Der vorliegende Beitrag untersucht spielerisch die Dynamiken einer visuellen Kompetenz, die zwischen diesen beiden Polen ausgehandelt wird. Als Beispiel wurde eine Bildserie des Düsseldorfer Fotokünstlers Thomas Ruff ausgewählt. Hierbei handelt es sich um im weitesten Sinne «postmoderne» Kunst-Fotografie, die insofern die Fragen nach der Kompetenz im Umgang mit fotografischer Bildlichkeit explizit aufwirft, als Ruffs Arbeiten ihre Rezeption vermutlich selbst thematisieren und innerbildlich zu reflektieren scheinen.

Relationship between oculomotor scanning determined by the DEM test and a contextual reading test in schoolchildren with reading difficulties.

Science.gov (United States)

Palomo-Alvarez, Catalina; Puell, María C

2009-09-01

The relationship between oculomotor scanning and reading in poor readers of primary school age is not well known. This study was designed to assess this relationship by determining mean Developmental Eye Movement (DEM) test times and reading speeds in a Spanish non-clinical population of children with poor reading skills but without dyslexia. We conducted a cross-sectional study on 81 poor readers (8-11 years of age) in the third to fifth grades recruited from 11 elementary schools in Madrid, Spain. In each subject with best spectacle correction, oculomotor scanning was measured using the DEM test, and reading speed (words per minute) was assessed by a standardized Spanish contextual reading test. Mean horizontal DEM times were higher than normative values for children in the third, fourth and fifth grades, by 20 seconds, 12 seconds, and 3 seconds respectively. Mean reading speeds were 18 words per minute lower than the norm for the third and fourth grades respectively, and 30 words per minute lower than the norm for the fifth grade. Reading speeds were significantly related to horizontal DEM times (r = -0.53, p school children at an early stage.

2012 Oregon Department of Geology and Mineral Industries (DOGAMI) Lidar DEM: Rogue River Oregon

Data.gov (United States)

National Oceanic and Atmospheric Administration, Department of Commerce — The dataset encompasses portions of Coos, Curry, Douglas, Jackson, and Josephine Counties.The bare earth digital elevation model (DEM) represents the earth's surface...

Recent developments in the electricity generation market in 2014; Aktuelle Entwicklungen auf dem Stromerzeugungsmarkt im Jahr 2014

Energy Technology Data Exchange (ETDEWEB)

Hofmann, Holger [Oppenhoff und Partner Rechtsanwaelte Steuerberater mbB, Koeln (Germany)

2015-02-16

Following up the report on the developments in the Electricity market from last year to this case this article shall give an overview of the current developments in 2014. The year 2014 was marked by the energy sector Program of the coalition agreement, which, under the three objectives of security of supply Affordability and environmental impact which has made clear Specifications for the production side in particular with regard to the final Nuclear Phase-out phase, the announced amendment of the EEG, system stability and also Fracking. The predominant theme in 2014 this was certainly the reform of the EEG and around it rambling topics on European level. Too much uncertainty with plant operators, investors and companies in German power generation market, has led in addition to the mentioned legislative package the revision of the EU environmental and energy aid guidelines, State aid procedure of the European Commission regarding the German promotion of electricity from renewable Energy and the process in the case of Aaland Vindkraft before the ECJ. The dynamics on the generation side, inter alia through the increased connection of decentralized generation plants, result in an increasing regulation in power generation. Finally a first bill for Fracking is published at the end of 2014. [German] Anknuepfend an den Bericht ueber die Entwicklungen auf dem Stromerzeugungsmarkt aus dem letzten Jahr soll dieser Beitrag einen Ueberblick ueber die aktuellen Entwicklungen in 2014 geben. Das Jahr 2014 war gepraegt von dem energiewirtschaftlichen Programm des Koalitionsvertrags, das unter dem Zieldreieck aus Versorgungssicherheit, Preisguenstigkeit und Umweltvertraeglichkeit klare Vorgaben fuer die Erzeugerseite vor allem mit Blick auf den endgueltigen Atomausstieg, die angekuendigte Novellierung des EEG, Systemstabilitaet und auch Fracking gemacht hat. Das vorherrschende Thema im Jahr 2014 war hierbei sicherlich die Reform des EEG sowie die sich darum rankenden Themen auf

Precise Determination of the Baseline Between the TerraSAR-X and TanDEM-X Satellites

Science.gov (United States)

Koenig, Rolf; Rothacher, Markus; Michalak, Grzegorz; Moon, Yongjin

TerraSAR-X, launched on June 15, 2007, and TanDEM-X, to be launched in September 2009, both carry the Tracking, Occultation and Ranging (TOR) category A payload instrument package. The TOR consists of a high-precision dual-frequency GPS receiver, called Integrated GPS Occultation Receiver (IGOR), for precise orbit determination and atmospheric sounding and a Laser retro-reflector (LRR) serving as target for the global Satellite Laser Ranging (SLR) ground station network. The TOR is supplied by the GeoForschungsZentrum Potsdam (GFZ) Germany, and the Center for Space Research (CSR), Austin, Texas. The objective of the German/US collaboration is twofold: provision of atmospheric profiles for use in numerical weather predictions and climate studies from the occultation data and precision SAR data processing based on precise orbits and atmospheric products. For the scientific objectives of the TanDEM- X mission, i.e., bi-static SAR together with TerraSAR-X, the dual-frequency GPS receiver is of vital importance for the millimeter level determination of the baseline or distance between the two spacecrafts. The paper discusses the feasibility of generating millimeter baselines by the example of GRACE, where for validation the distance between the two GRACE satellites is directly available from the micrometer-level intersatellite link measurements. The distance of the GRACE satellites is some 200 km, the distance of the TerraSAR-X/TanDEM-X formation will be some 200 meters. Therefore the proposed approach is then subject to a simulation of the foreseen TerraSAR-X/TanDEM-X formation. The effect of varying space environmental conditions, of possible phase center variations, multi path, and of varying center of mass of the spacecrafts are evaluated and discussed.

Investigation of the fluidized bed-chemical vapor deposition (FBCVD) process using CFD-DEM method

International Nuclear Information System (INIS)

Liu Malin; Liu Rongzheng; Wen Yuanyun; Liu Bing; Shao Youlin

2014-01-01

The CFD-DEM-CVD multiscale coupling simulation concept was proposed based on the mass/momentum/energy transfer involved in the FB-CVD process. The pyrolysis process of the reaction gas in the spouted bed can be simulated by CFD method, then the concentration field and velocity field can be extracted and coupled with the particle movement behavior which can be simulated by DEM. Particle deposition process can be described by the CVD model based on particle position, velocity and neighboring gas concentration. This multiscale coupling method can be implemented in the Fluent@-EDEM@ software with their UDF (User Definition Function) and API (Application Programming Interface). Base on the multiscale coupling concept, the criterion for evaluating FB-CVD process is given. At first, the volume in the coating furnace is divided into two parts (active coating area and non-active coating area) based on simulation results of chemical pyrolysis process. Then the residence time of all particles in the active coating area can be obtained using the CFD-DEM simulation method. The residence time distribution can be used as a criterion for evaluating the gas-solid contact efficiency and operation performance of the coating furnace. At last different coating parameters of the coating furnace are compared based on the proposed criterion. And also, the future research emphasis is discussed. (author)

VT Lidar Hydro-flattened DEM (0.7 meter) - 2014 - Chittenden, Lamoille, Orleans, & Washington Counties

Data.gov (United States)

Vermont Center for Geographic Information — (Link to Metadata) This metadata applies to the following collection area(s): Eastern VT 2014 0.7m and Digital Elevation Model (DEM) dataset of the following...

Production of 17-O-demethyl-geldanamycin, a cytotoxic ansamycin polyketide, by Streptomyces hygroscopicus DEM20745.

Science.gov (United States)

Baksh, Aron; Kepplinger, Bernhard; Isah, Hadiza A; Probert, Michael R; Clegg, William; Wills, Corinne; Goodfellow, Michael; Errington, Jeff; Allenby, Nick; Hall, Michael J

2017-08-01

The actinomycete DEM20745, collected from non-rhizosphere soil adjacent to Paraserianthes falactaria trees (Cangkringan, Indonesia), is an efficient producer of the anticancer ansamycin polyketide 17-O-demethyl-geldanamycin (17-O-DMG), a biosynthetic precursor of the Hsp90 inhibitor geldanamycin (GDM). In DEM20745, 17-O-DMG is the major ansamycin product observed reaching a maximum titre of 17 mg/L in the fermentation broth. 17-O-DMG has the potential to be a key starting material for the semi-synthesis of GDM analogues for use in anticancer therapy. Thus, this preferential biosynthesis of 17-O-DMG facilitates easy access to this important molecule and provides further insight in the biosynthesis of the geldanamycins.

Atmosphere and Ambient Space

DEFF Research Database (Denmark)

Schmidt, Ulrik

Atmosphere and Ambient Space This paper explores the relation between atmosphere and ambient space. Atmosphere and ambient space share many salient properties. They are both ontologically indeterminate, constantly varying and formally diffuse and they are both experienced as a subtle, non......-signifying property of a given space. But from a certain point of view, the two concepts also designate quite dissimilar experiences of space. To be ’ambient’ means to surround. Accordingly, ambient space is that space, which surrounds something or somebody. (Gibson 1987: 65) Since space is essentially...... of a surrounding character, all space can thus be described as having a fundamentally ambient character. So what precisely is an ambient space, then? As I will argue in my presentation, ambient space is a sensory effect of spatiality when a space is experienced as being particularly surrounding: a ‘space effect...

KAJIAN PEMANFAATAN DEM SRTM & GOOGLE EARTH UNTUK PARAMETER PENILAIAN POTENSI KERUGIAN EKONOMI AKIBAT BANJIR ROB

Directory of Open Access Journals (Sweden)

Arief L Nugraha

2013-12-01

Full Text Available Tidal flood is a significant threat for the economic growth rate in the city of Semarang. The threat mitigation requires planning, thereby reducing the impact of the losses. The availability of global data with free access can provide solutions in disaster management, the data are SRTM DEM and Google Earth. With both of these data can be mapped potential economic losses caused by tidal flooding. With the techniques of remote sensing and GIS to handle the SRTM DEM data and Google Earth, the techniques can be generated maps and models of tidal inundation area maps woke up in the city of Semarang. Analysis of potential economic losses can be calculated by doing an overlay of the two maps generated. The results achieved from this study is SRTM DEM and Google Earth can able to produce thematic maps of situational tidal flood disaster so that it can be used as a parameter value calculation of the potential economic losses. This study also obtain the result that the area of ​​land affected by the tidal flood an area of ​​8339.31 hectares and the number of buildings reaching 78 299 pieces, which the district that has the highest impact on the tidal flood that North Semarang.

Licenciamento ambiental e sustentabilidade

Directory of Open Access Journals (Sweden)

Marcelo Macedo Valinhas

2011-12-01

Full Text Available A sustentabilidade está apoiada principalmente nas dimensões econômica, ambiental e social. No entanto, sem a dimensão política ela não se constrói. Um dos principais instrumentos de comando e controle da política nacional de meio ambiente, o licenciamento ambiental é um processo contínuo de gestão ambiental pública e privada. Analisou-se o processo de licenciamento ambiental como acoplamento estrutural entre os sistemas social, econômico e ambiental. Apesar da constatação de críticas aos mecanismos de comando e controle dos últimos anos, foi verificado que o Estado do Rio de Janeiro tem buscado integrar a política ambiental do Estado à gestão ambiental privada e que esta integração busca atender às demandas dos sistemas sociais e econômicos para as questões ambientais. Em linhas gerais, este caminho segue as estratégias e ações propostas na Agenda 21 brasileira.

Saúde Ambiental: uma Análise dos Resultados das Conferências Nacionais de Meio Ambiente, Saúde e Saúde Ambiental

Directory of Open Access Journals (Sweden)

Maria Beatriz Maury de Carvalho

2010-08-01

Full Text Available A representação nas políticas públicas do conceito de saúde ambiental, como expressão do equilíbrio da rede de conexões entre a sociedade humana e a natureza é discutida neste trabalho, no intuito de demonstrar o status quo da saúde ambiental nas políticas públicas no país. Primeiro foi traçado o histórico da “ambientalização na saúde”, do conceito de saúde ambiental e da institucionalização das políticas ambientais e de saúde ambiental no âmbito dos Ministérios do Meio Ambiente e da Saúde. As interações entre as políticas de Saúde e de Meio Ambiente para a efetivação de uma Política Nacional de Saúde Ambiental e as intersecções dos resultados das Conferências Nacionais de Saúde, Meio Ambiente e Saúde Ambiental foram analisadas; concluindo- se com os avanços conseguidos pelos dois setores, os desafios para a articulação intersetorial e a participação social para a construção de políticas públicas de saúde ambiental.

DEVELOPMENT AND EVALUATION OF SIMPLE MEASUREMENT SYSTEM USING THE OBLIQUE PHOTO AND DEM

Directory of Open Access Journals (Sweden)

H. Nonaka

2016-06-01

Full Text Available When a disaster occurs, we must grasp and evaluate its damage as soon as possible. Then we try to estimate them from some kind of photographs, such as surveillance camera imagery, satellite imagery, photographs taken from a helicopter and so on. Especially in initial stage, estimation of decent damage situation for a short time is more important than investigation of damage situation for a long time. One of the source of damage situation is the image taken by surveillance camera, satellite sensor and helicopter. If we can measure any targets in these imagery, we can estimate a length of a lava flow, a reach of a cinder and a sediment volume in volcanic eruption or landslide. Therefore in order to measure various information for a short time, we developed a simplified measurement system which uses these photographs. This system requires DEM in addition to photographs, but it is possible to use previously acquired DEM. To measure an object, we require only two steps. One is the determination of the position and the posture in which the photograph is shot. We determine these parameters using DEM. The other step is the measurement of an object in photograph. In this paper, we describe this system and show the experimental results to evaluate this system. In this experiment we measured the top of Mt. Usu by using two measurement method of this system. Then we can measure it about one hour and the difference between the measurement results and the airborne LiDAR data are less than 10 meter.

LABORATORIO VIRTUAL PARA EL DISEÑO DE RADIO ENLACES EN UN AMBIENTE GRID

Directory of Open Access Journals (Sweden)

Luz Hermencia Santamaría Granados

2008-01-01

Full Text Available Es un prototipo de Laboratorio Virtual (Virtual Laboratory, LV que presenta un modelo tridimensional de un sector de la ciudad de Bogotá (la zona entre las sedes de la Universidad Distrital. El usuario interactúa en este laboratorio ubicando antenas de Radio Enlaces (Radio Links, RL dentro de esta zona virtual para analizar su correcta interconexión. Tecnológicamente, el proyecto dispone de un Objeto Virtual de aprendizaje (OVA para el diseño del RL sobre un Modelo Digital de Elevación (Digital Elevation Model, DEM Tridimensional (3D. El LV se accede a través de un portal grid (un portal de interfaz gráfica que puede acceder a la malla computacional, sistema distribuido de computación, que utiliza una interfaz de acceso al mundo virtual 3D. El artículo involucra la definición de una arquitectura para ambientes grid con sus respectivos protocolos y servicios disponibles para el funcionamiento del LV en la Web.

Evaluation of fracturing process of soft rocks at great depth by AE measurement and DEM simulation

International Nuclear Information System (INIS)

Aoki, Kenji; Mito, Yoshitada; Kurokawa, Susumu; Matsui, Hiroya; Niunoya, Sumio; Minami, Masayuki

2007-01-01

The authors developed the stress-based evaluation system of EDZ by AE monitoring and Distinct Element Method (DEM) simulation. In order to apply this system to the soft rock site, the authors try to grasp the relationship between AE parameters, stress change and rock fracturing process by performing the high stiffness tri-axial compression tests including AE measurements on the soft rock samples, and its simulations by DEM using bonded particle model. As the result, it is found that change in predominant AE frequency is effective to evaluate fracturing process in sedimentary soft rocks, and the relationship between stress change and fracturing process is also clarified. (author)

External Validation of the ASTER GDEM2, GMTED2010 and CGIAR-CSI- SRTM v4.1 Free Access Digital Elevation Models (DEMs in Tunisia and Algeria

Directory of Open Access Journals (Sweden)

Djamel Athmania

2014-05-01

Full Text Available Digital Elevation Models (DEMs including Advanced Spaceborne Thermal Emission and Reflection Radiometer-Global Digital Elevation Model (ASTER GDEM, Shuttle Radar Topography Mission (SRTM, and Global Multi-resolution Terrain Elevation Data 2010 (GMTED2010 are freely available for nearly the entire earth’s surface. DEMs that are usually subject to errors need to be evaluated using reference elevation data of higher accuracy. This work was performed to assess the vertical accuracy of the ASTER GDEM version 2, (ASTER GDEM2, the Consultative Group on International Agriculture Research-Consortium for Spatial Information (CGIAR-CSI SRTM version 4.1 (SRTM v4.1 and the systematic subsample GMTED2010, at their original spatial resolution, using Global Navigation Satellite Systems (GNSS validation points. Two test sites, the Anaguid Saharan platform in southern Tunisia and the Tebessa basin in north eastern Algeria, were chosen for accuracy assessment of the above mentioned DEMs, based on geostatistical and statistical measurements. Within the geostatistical approach, empirical variograms of each DEM were compared with those of the GPS validation points. Statistical measures were computed from the elevation differences between the DEM pixel value and the corresponding GPS point. For each DEM, a Root Mean Square Error (RMSE was determined for model validation. In addition, statistical tools such as frequency histograms and Q-Q plots were used to evaluate error distributions in each DEM. The results indicate that the vertical accuracy of SRTM model is much higher than ASTER GDEM2 and GMTED2010 for both sites. In Anaguid test site, the vertical accuracy of SRTM is estimated 3.6 m (in terms of RMSE 5.3 m and 4.5 m for the ASTERGDEM2 and GMTED2010 DEMs, respectively. In Tebessa test site, the overall vertical accuracy shows a RMSE of 9.8 m, 8.3 m and 9.6 m for ASTER GDEM 2, SRTM and GMTED2010 DEM, respectively. This work is the first study to report the

Der Einfluss der Digitalisierung auf die Organisation eines Unternehmens

Science.gov (United States)

Walter, Wolfram M.

Die Digitalisierung schreitet mit großen Schritten voran. Dies wirkt sich nicht nur auf die Gesellschaft im Grundsatz, sondern auch auf das Verhalten der Kunden aus. Neue Kommunikationswege beschleunigen die Interaktion zwischen Unternehmen und Verbraucher. Im Vergleich mit großen Internetfirmen werden etablierte Dienstleistungsunternehmen - vom Energieversorger bis zu Versicherungen - stark unter Druck gesetzt, sich noch intensiver mit dem Kundenservice auseinanderzusetzen. Dies wird nur möglich sein, wenn sich die Organisationen entsprechend positionieren und sich frühzeitig auf die Veränderungen einstellen. Hieraus ergeben sich mehr Chancen als Risiken, zumal es nicht nur neue Prozesse, sondern auch neue Berufsbilder geben wird.

Der Terminator und die Femme fatale. Gender im Genre-Kino The Terminator and the Femme Fatale: Gender in Genre Cinema

Directory of Open Access Journals (Sweden)

Rochus Wolff

2005-03-01

Full Text Available Mit Hollywood hybrid legen Claudia Liebrand und Ines Steiner einen äußerst lesenswerten Sammelband vor, in dem aus unterschiedlichen Blickwinkeln Hollywoodfilme der vergangenen Jahre untersucht wurden. Im Zentrum stehen dabei stets die komplexen Wechselwirkungen zwischen Genre und Gender. Von wenigen Schwächen abgesehen, gelingen den Autor/-innen dabei durchweg überzeugende Analysen.Claudia Liesbrand and Ines Steiner’s very worth reading Hollywood hybrid is a collected volume in which Hollywood films of recent years are examined from various angles. Central to the text is the continually complex interaction between genre and gender. With this, the authors enjoy, a few weaknesses aside, ongoing success.

Pharmakobotanische Untersuchungen von Lavendelsorten auf dem Plattensee- Plateau

Directory of Open Access Journals (Sweden)

Tóth, Frida

2014-09-01

Full Text Available Auf dem Hof Dörgicsei Levendula Major GmbH wurden 9 Lavendelsorten (6 Sorten von Lavandula angustifolia und 3 Sorten von Lavandula x intermedia untersucht. Neben den morphologischen und Wachstumseigenschaften wurden auch Frisch- und Trockengewichte bewertet. Quantitative und qualitative Untersuchungen von den Blüten- und Ätherischöldrogen wurden auch durchgeführt. Die statistische Analyse zeigte signifikant höhere Erträge bei den Sorten L. angustifolia ’Essence Purple’ und L. x intermedia ’Edelweiss’. Gehalt und Zusammensetzung von ätherischem Öl war eindeutig bei der Sorte L. angustifolia ’Ellagance Purple’ am günstigsten.

Det ambiente

DEFF Research Database (Denmark)

Schmidt, Ulrik

Om begrebet "det ambiente", der beskriver, hvad der sker, når vi fornemmer baggrundsmusikkens diskrete beats, betragter udsigten gennem panoramavinduet eller tager 3D-brillerne på og læner os tilbage i biografsædet. Bogen analyserer, hvorfan ambiente oplevelser skabes, og hvilke konsekvenser det...

Ambient Sensors

NARCIS (Netherlands)

Börner, Dirk; Specht, Marcus

2014-01-01

This software sketches comprise two custom-built ambient sensors, i.e. a noise and a movement sensor. Both sensors measure an ambient value and process the values to a color gradient (green > yellow > red). The sensors were built using the Processing 1.5.1 development environment. Available under

Pedagogía ambiental y didáctica ambiental como fundamentos del currículo para la formación ambiental

OpenAIRE

Julio César Tovar-Gálvez

2013-01-01

Se trata el problema de la fundamentación del currículo para la formación ambiental en la educación superior, frente a lo cual es necesario construir los conceptos de pedagogía ambiental y de didáctica ambiental. El marco teórico permite definir las categorías "lo pedagógico" y "lo didáctico", a partir de lo cual se analiza la literatura y con ello definir pedagogía ambiental y didáctica ambiental. El estado del arte permite establecer que existen dos sustentos teóricos: a) uno que se cimenta...

Constructing Palaeo-DEMs in landscape evolution: example of the Geren catchment, Turkey

Science.gov (United States)

van Gorp, Wouter; Schoorl, Jeroen M.; Veldkamp, Tom; Maddy, Darrel; Demir, Tuncer; Aytac, Serdar

2017-04-01

How to reconstruct the past landscape and how does this influence your modelling results? This is an important paradigma in the soilscape and landscape evolution modelling community. Here an example of Turkey will be presented where a 300 ka LEM simulation requested to the thoroughly think about the initial landscape as an important input. What information can be used to know the morphology of a landscape 300 ka ago? The Geren catchment, a tributary of the upstream Gediz river near Kula, Turkey, has been influenced by base level changes during the Late Pleistocene and Holocene. Different lavaflows have blocked the Gediz and Geren river several times over in the timespan of the last 300 ka -200 Ka and in the recent Holocene. The heavily dissected Geren catchment shows a landscape evolution which is more complex than just a reaction on these base level changes. The steps and inputs of the palaeo DEM reconstruction will be presented and the modelling results will be presented. Keywords: Digital Elevation Model, Palaeo DEMs, Numerical modelling

Creating high-resolution bare-earth digital elevation models (DEMs) from stereo imagery in an area of densely vegetated deciduous forest using combinations of procedures designed for lidar point cloud filtering

Science.gov (United States)

DeWitt, Jessica D.; Warner, Timothy A.; Chirico, Peter G.; Bergstresser, Sarah E.

2017-01-01

For areas of the world that do not have access to lidar, fine-scale digital elevation models (DEMs) can be photogrammetrically created using globally available high-spatial resolution stereo satellite imagery. The resultant DEM is best termed a digital surface model (DSM) because it includes heights of surface features. In densely vegetated conditions, this inclusion can limit its usefulness in applications requiring a bare-earth DEM. This study explores the use of techniques designed for filtering lidar point clouds to mitigate the elevation artifacts caused by above ground features, within the context of a case study of Prince William Forest Park, Virginia, USA. The influences of land cover and leaf-on vs. leaf-off conditions are investigated, and the accuracy of the raw photogrammetric DSM extracted from leaf-on imagery was between that of a lidar bare-earth DEM and the Shuttle Radar Topography Mission DEM. Although the filtered leaf-on photogrammetric DEM retains some artifacts of the vegetation canopy and may not be useful for some applications, filtering procedures significantly improved the accuracy of the modeled terrain. The accuracy of the DSM extracted in leaf-off conditions was comparable in most areas to the lidar bare-earth DEM and filtering procedures resulted in accuracy comparable of that to the lidar DEM.

Inferring sediment connectivity from high-resolution DEMs of Difference

Science.gov (United States)

Heckmann, Tobias; Vericat, Damià

2017-04-01

Topographic changes due to the erosion and deposition of bedrock, sediments and soil can be measured by differencing Digital Elevation Models (DEM) acquired at different points in time. So-called morphological sediment budgets can be computed from such DEMs of Difference (DoD) on an areal rather than a point basis. The advent of high-resolution and highly accurate surveying techniques (e.g. LiDAR, SfM), together with recent advances of survey platforms (e.g. UaVs) provides opportunities to improve the spatial and temporal scale (in terms of extent and resolution), the availability and quality of such measurements. Many studies have used DoD to investigate and interpret the spatial pattern of positive and negative vertical differences in terms of erosion and deposition, or of horizontal movement. Vertical differences can be converted to volumes, and negative (erosion) and positive (deposition) volumetric changes aggregated for spatial units (e.g., landforms, hillslopes, river channels) have been used to compute net balances. We argue that flow routing algorithms common in digital terrain analysis provide a means to enrich DoD-based investigations with some information about (potential) sediment pathways - something that has been widely neglected in previous studies. Where the DoD indicates a positive surface change, flow routing delineates the upslope area where the deposited sediment has potentially been derived from. In the downslope direction, flow routing indicates probable downslope pathways of material eroded/detached/entrained where the DoD shows negative surface change. This material has either been deposited along these pathways or been flushed out of the area of investigation. This is a question of sediment connectivity, a property of a system (i.e. a hillslope, a sub-/catchment) that describes its potential to move sediment through itself. The sediment pathways derived from the DEM are related to structural connectivity, while the spatial pattern of (net

Pre-2014 mudslides at Oso revealed by InSAR and multi-source DEM analysis

Science.gov (United States)

Kim, J. W.; Lu, Z.; QU, F.

2014-12-01

The landslide is a process that results in the downward and outward movement of slope-reshaping materials including rocks and soils and annually causes the loss of approximately $3.5 billion and tens of casualties in the United States. The 2014 Oso mudslide was an extreme event costing nearly 40 deaths and damaging civilian properties. Landslides are often unpredictable, but in many cases, catastrophic events are repetitive. Historic record in the Oso mudslide site indicates that there have been serial events in decades, though the extent of sliding events varied from time to time. In our study, the combination of multi-source DEMs, InSAR, and time-series InSAR analysis has enabled to characterize the Oso mudslide. InSAR results from ALOS PALSAR show that there was no significant deformation between mid-2006 and 2011. The combination of time-series InSAR analysis and old-dated DEM indicated revealed topographic changes associated the 2006 sliding event, which is confirmed by the difference of multiple LiDAR DEMs. Precipitation and discharge measurements before the 2006 and 2014 landslide events did not exhibit extremely anomalous records, suggesting the precipitation is not the controlling factor in determining the sliding events at Oso. The lack of surface deformation during 2006-2011 and weak correlation between the precipitation and the sliding event, suggest other factors (such as porosity) might play a critical role on the run-away events at this Oso and other similar landslides.

Types for BioAmbients

Directory of Open Access Journals (Sweden)

Sara Capecchi

2010-02-01

Full Text Available The BioAmbients calculus is a process algebra suitable for representing compartmentalization, molecular localization and movements between compartments. In this paper we enrich this calculus with a static type system classifying each ambient with group types specifying the kind of compartments in which the ambient can stay. The type system ensures that, in a well-typed process, ambients cannot be nested in a way that violates the type hierarchy. Exploiting the information given by the group types, we also extend the operational semantics of BioAmbients with rules signalling errors that may derive from undesired ambients' moves (i.e. merging incompatible tissues. Thus, the signal of errors can help the modeller to detect and locate unwanted situations that may arise in a biological system, and give practical hints on how to avoid the undesired behaviour.

Solidarität und Heterogenität in Gruppen: Theoretische und empirische Skizzen

Directory of Open Access Journals (Sweden)

Irma Rybnikova

2015-03-01

Full Text Available Für gewöhnlich wird Heterogenität der Gruppen als Hindernis für Solidarität ihrer Mitglieder angesehen: Je verschiedener die Mitglieder, umso schwieriger kommt Solidarität zustande. In der vorliegenden Studie hinterfrage ich diese Generalisierung, indem ich eine Reihe von theoretischen Ansätzen aus der Soziologie und der Gruppenpsychologie konsultiere. Während einige dieser Ansätze nahelegen, dass Heterogenität der Mitglieder die Solidarität der Gruppen untergräbt, bestreiten dies andere Ansätze und gehen davon aus, dass auch heterogene Gruppen solidarisch sein können, vor allem dann, wenn unter den Mitgliedern eine Interdependenz vorliegt. Diese widersprüchlichen theoretischen Annahmen animierten mich zu einer empirischen Untersuchung von Studierendengruppen in einer Lehrveranstaltung. Die Ergebnisse zeigen zwar, dass zwischen Heterogenität und Solidarität in den interdependenten Gruppen ein Zusammenhang anzunehmen ist, dass jedoch auch eine Ambivalenz besteht zwischen individueller und Kollegensolidarität. Vor dem Hintergrund der theoretischen und empirischen Erkenntnisse diskutiere ich Schlussfolgerungen für die Forschung und für die praktischen Bemühungen der Solidarisierung im Bereich der gewerkschaftlichen Organisierung.

A Review of Discrete Element Method (DEM) Particle Shapes and Size Distributions for Lunar Soil

Science.gov (United States)

Lane, John E.; Metzger, Philip T.; Wilkinson, R. Allen

2010-01-01

As part of ongoing efforts to develop models of lunar soil mechanics, this report reviews two topics that are important to discrete element method (DEM) modeling the behavior of soils (such as lunar soils): (1) methods of modeling particle shapes and (2) analytical representations of particle size distribution. The choice of particle shape complexity is driven primarily by opposing tradeoffs with total number of particles, computer memory, and total simulation computer processing time. The choice is also dependent on available DEM software capabilities. For example, PFC2D/PFC3D and EDEM support clustering of spheres; MIMES incorporates superquadric particle shapes; and BLOKS3D provides polyhedra shapes. Most commercial and custom DEM software supports some type of complex particle shape beyond the standard sphere. Convex polyhedra, clusters of spheres and single parametric particle shapes such as the ellipsoid, polyellipsoid, and superquadric, are all motivated by the desire to introduce asymmetry into the particle shape, as well as edges and corners, in order to better simulate actual granular particle shapes and behavior. An empirical particle size distribution (PSD) formula is shown to fit desert sand data from Bagnold. Particle size data of JSC-1a obtained from a fine particle analyzer at the NASA Kennedy Space Center is also fitted to a similar empirical PSD function.

ANALYSIS AND VALIDATION OF GRID DEM GENERATION BASED ON GAUSSIAN MARKOV RANDOM FIELD

Directory of Open Access Journals (Sweden)

F. J. Aguilar

2016-06-01

Full Text Available Digital Elevation Models (DEMs are considered as one of the most relevant geospatial data to carry out land-cover and land-use classification. This work deals with the application of a mathematical framework based on a Gaussian Markov Random Field (GMRF to interpolate grid DEMs from scattered elevation data. The performance of the GMRF interpolation model was tested on a set of LiDAR data (0.87 points/m2 provided by the Spanish Government (PNOA Programme over a complex working area mainly covered by greenhouses in Almería, Spain. The original LiDAR data was decimated by randomly removing different fractions of the original points (from 10% to up to 99% of points removed. In every case, the remaining points (scattered observed points were used to obtain a 1 m grid spacing GMRF-interpolated Digital Surface Model (DSM whose accuracy was assessed by means of the set of previously extracted checkpoints. The GMRF accuracy results were compared with those provided by the widely known Triangulation with Linear Interpolation (TLI. Finally, the GMRF method was applied to a real-world case consisting of filling the LiDAR-derived DSM gaps after manually filtering out non-ground points to obtain a Digital Terrain Model (DTM. Regarding accuracy, both GMRF and TLI produced visually pleasing and similar results in terms of vertical accuracy. As an added bonus, the GMRF mathematical framework makes possible to both retrieve the estimated uncertainty for every interpolated elevation point (the DEM uncertainty and include break lines or terrain discontinuities between adjacent cells to produce higher quality DTMs.

Bank gully extraction from DEMs utilizing the geomorphologic features of a loess hilly area in China

Science.gov (United States)

Yang, Xin; Na, Jiaming; Tang, Guoan; Wang, Tingting; Zhu, Axing

2018-04-01

As one of most active gully types in the Chinese Loess Plateau, bank gullies generally indicate soil loss and land degradation. This study addressed the lack of detailed, large scale monitoring of bank gullies and proposed a semi-automatic method for extracting bank gullies, given typical topographic features based on 5 m resolution DEMs. First, channel networks, including bank gullies, are extracted through an iterative channel burn-in algorithm. Second, gully heads are correctly positioned based on the spatial relationship between gully heads and their corresponding gully shoulder lines. Third, bank gullies are distinguished from other gullies using the newly proposed topographic measurement of "relative gully depth (RGD)." The experimental results from the loess hilly area of the Linjiajian watershed in the Chinese Loess Plateau show that the producer accuracy reaches 87.5%. The accuracy is affected by the DEM resolution and RGD parameters, as well as the accuracy of the gully shoulder line. The application in the Madigou watershed with a high DEM resolution validated the duplicability of this method in other areas. The overall performance shows that bank gullies can be extracted with acceptable accuracy over a large area, which provides essential information for research on soil erosion, geomorphology, and environmental ecology.

To the question on accuracy of forest heights’ measurements by the TanDEM-X radar interferometry data

Directory of Open Access Journals (Sweden)

T. N. Chimitdorzhiev

2016-08-01

Full Text Available The paper presents the validation results of the InSAR method for determining the forest canopy height, based on TanDEM-X and ALOS PALSAR data. The research conducted on the territory of the Baikal-Kudara forest area of the Republic of Buryatia (52°10'N, 106°48'E. Forest vegetation is represented mainly by conifers – pine, and spruce, with a small admixture of deciduous trees – aspen, birch, etc. The forest vegetation height was determined by subtracting the digital elevation model (DEM of the digital terrain model (DTM. DEM is built according to the L-band (wavelength of 23.5 cm ALOS PALSAR satellite with horizontal co-polarization mode. In the investigation it was assumed that a radar signal of ALOS PALSAR passes all forest thickness and reflected from the underlying surface, made it possible to recover terrain under forest canopy. DTM has been built using the TanDEM-X data (wavelength 3 cm. In this case, it was assumed that the radar echoes scattered from a some virtual phase centers of scattering surface, which characterizes the upper limit of the continuous forest canopy. To check the accuracy of satellite definitions of forest height in study area were made high-precision geodetic measurement of trees heights using electronic total station and the coordinates of geographic control points using differential GPS receivers. The discrepancy between the satellite and ground-based measurements at 11 test sites did not exceed 2 m, which is mainly due to the difference in measurement techniques: height of individual trees by ground methods and continuous forest canopy height using radar interferometry.

La revista Demófilo y la antropología cultural en Andalucía

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Rodríguez Becerra, Salvador

2002-06-01

Full Text Available Published since 1987 by the Machado Foundation, of Seville, Demófilo represents the resumption of scientific folklore studies in the late 19^th century championed by Antonio Machado y Álvarez and published in the journal El Folk-lore Andaluz. The basic objectives of Demófilo are «to rescue, analyze and divulge Andalousia's traditional culture.» The journal is oriented toward high schools, colleges and universities in Andalousia as well as any institution interested in the traditional culture of the area, such as museums and organizations supporting Andalousia's cultural heritage. The authors also include in this article a summary of the journal's monographic issues published to date.

Publicación de la Fundación Machado, de Sevilla, y nacida en 1987, Demófilo enlaza con su predecesora en el siglo XIX, El Folk-lore Andaluz, del movimiento sevillano de estudio científico del folklore que animara sobre todo Antonio Machado y Álvarez. Demófilo tiene como objetivos básicos «rescatar, analizar y difundir la cultura tradicional andaluza» y va dirigida especialmente a centros de enseñanza media y universidades de Andalucía, así como a instituciones interesadas en la cultura tradicional de la región, como museos y asociaciones de defensa del patrimonio cultural. Los autores incluyen también en este artículo un resumen de los números monográficos de la revista publicados hasta la fecha.

Data based ambient lighting control

NARCIS (Netherlands)

2012-01-01

In controlling an ambient lighting element, a category of data being rendered by a host is identified, ambient lighting data associated with the identified category is retrieved, and the retrieved ambient lighting data is rendered in correspondence with the rendered data. The retrieved ambient

Impact of mesh and DEM resolutions in SEM simulation of 3D seismic response

NARCIS (Netherlands)

Khan, Saad; van der Meijde, M.; van der Werff, H.M.A.; Shafique, Muhammad

2017-01-01

This study shows that the resolution of a digital elevation model (DEM) and model mesh strongly influences 3D simulations of seismic response. Topographic heterogeneity scatters seismic waves and causes variation in seismic response (am-plification and deamplification of seismic amplitudes) at the

Biotecnologia Ambiental. Aplicacions biotecnològiques a la millora del medi ambient

OpenAIRE

Blanch i Gisbert, Anicet

2010-01-01

La biotecnología ambiental comprende el conjunto de actividades tecnológicas que facilitan la comprensión y la gestión de los sistemas biológicos en el medio ambiente, con el fin de proveer productos y servicios. Actualmente, la gestión del medio ambiente y de sus recursos naturales no se comprende si no se realiza de manera sostenible. Los avances científicos y tecnológicos le están permitiendo a la biotecnología ambiental, el desarrollo de nuevas herramientas y aplicaciones con los que resp...

The future is 'ambient'

Science.gov (United States)

Lugmayr, Artur

2006-02-01

The research field of ambient media starts to spread rapidly and first applications for consumer homes are on the way. Ambient media is the logical continuation of research around media. Media has been evolving from old media (e.g. print media), to integrated presentation in one form (multimedia - or new media), to generating a synthetic world (virtual reality), to the natural environment is the user-interface (ambient media), and will be evolving towards real/synthetic undistinguishable media (bio-media or bio-multimedia). After the IT bubble was bursting, multimedia was lacking a vision of potential future scenarios and applications. Within this research paper the potentials, applications, and market available solutions of mobile ambient multimedia are studied. The different features of ambient mobile multimedia are manifold and include wearable computers, adaptive software, context awareness, ubiquitous computers, middleware, and wireless networks. The paper especially focuses on algorithms and methods that can be utilized to realize modern mobile ambient systems.

5 Meter Alaska Digital Elevation Models (DEMs) - USGS National Map 3DEP Downloadable Data Collection

Data.gov (United States)

U.S. Geological Survey, Department of the Interior — This dataset is comprised of 5-meter ifsar-derived Digital Elevation Models (DEMs) over Alaska only. It is distributed as one-degree blocks with overedge. Horizontal...

Aerial photography flight quality assessment with GPS/INS and DEM data

Science.gov (United States)

Zhao, Haitao; Zhang, Bing; Shang, Jiali; Liu, Jiangui; Li, Dong; Chen, Yanyan; Zuo, Zhengli; Chen, Zhengchao

2018-01-01

The flight altitude, ground coverage, photo overlap, and other acquisition specifications of an aerial photography flight mission directly affect the quality and accuracy of the subsequent mapping tasks. To ensure smooth post-flight data processing and fulfill the pre-defined mapping accuracy, flight quality assessments should be carried out in time. This paper presents a novel and rigorous approach for flight quality evaluation of frame cameras with GPS/INS data and DEM, using geometric calculation rather than image analysis as in the conventional methods. This new approach is based mainly on the collinearity equations, in which the accuracy of a set of flight quality indicators is derived through a rigorous error propagation model and validated with scenario data. Theoretical analysis and practical flight test of an aerial photography mission using an UltraCamXp camera showed that the calculated photo overlap is accurate enough for flight quality assessment of 5 cm ground sample distance image, using the SRTMGL3 DEM and the POSAV510 GPS/INS data. An even better overlap accuracy could be achieved for coarser-resolution aerial photography. With this new approach, the flight quality evaluation can be conducted on site right after landing, providing accurate and timely information for decision making.

DEM modeling of failure mechanisms induced by excavations on the Moon

Science.gov (United States)

jiang, mingjing; shen, zhifu; Utili, Stefano

2013-04-01

2D Discrete Element Method (DEM) analyses were performed for excavations supported by retaining walls in lunar environment. The lunar terrain is made of a layer of sand (regolith) which differs from terrestrial sands for two main features: the presence of adhesive attractive forces due to van der Waals interactions and grains being very irregular in shape leading to high interlocking. A simplified contact model based on linear elasticity and perfect plasticity was employed. The contact model includes a moment - relative rotation law to account for high interlocking among grains and a normal adhesion law to account for the van der Waals interactions. Analyses of the excavations were run under both lunar and terrestrial environments. Under lunar environment, gravity is approximately one sixth than the value on Earth and adhesion forces between grains of lunar regolith due to van der Waals interactions are not negligible. From the DEM simulations it emerged that van der Waals interactions may significantly increase the bending moment and deflection of the retaining wall, and the ground displacements. Hence this study indicates that an unsafe estimate of the wall response to an excavation on the Moon would be obtained from physical experiments performed in a terrestrial environment, i.e., considering the effect of gravity but neglecting the van der Waals interactions.

Towards New Ambient Light Systems: a Close Look at Existing Encodings of Ambient Light Systems

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Andrii Matviienko

2015-10-01

Full Text Available Ambient systems provide information in the periphery of a user’s attention. Their aim is to present information as unobtrusively as possible to avoid interrupting primary tasks (e.g. writing or reading. In recent years, light has been used to create ambient systems to display information. Examples of ambient light systems range from simple notification systems such as displaying messages or calendar event reminders, to more complex systems such as focusing on conveying information regarding health activity tracking. However, for ambient light systems, there is a broad design space that lacks guidelines on when to make use of light displays and how to design them. In this paper we provide a systematic overview of existing ambient light systems over four identified information classes derived from 72 existing ambient light systems. The most prominent encoding parameters among the surveyed ambient light systems are color, brightness, and their combination. By analyzing existing ambient light systems, we provide a first step towards developing guidelines for designing future ambient light systems.

SveDem, the Swedish Dementia Registry - a tool for improving the quality of diagnostics, treatment and care of dementia patients in clinical practice.

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Dorota Religa

Full Text Available The Swedish Dementia Registry (SveDem was developed with the aim to improve the quality of diagnostic work-up, treatment and care of patients with dementia disorders in Sweden.SveDem is an internet based quality registry where several indicators can be followed over time. It includes information about the diagnostic work-up, medical treatment and community support (www.svedem.se. The patients are diagnosed and followed-up yearly in specialist units, primary care centres or in nursing homes.The database was initiated in May 2007 and covers almost all of Sweden. There were 28 722 patients registered with a mean age of 79.3 years during 2007-2012. Each participating unit obtains continuous online statistics from its own registrations and they can be compared with regional and national data. A report from SveDem is published yearly to inform medical and care professionals as well as political and administrative decision-makers about the current quality of diagnostics, treatment and care of patients with dementia disorders in Sweden.SveDem provides knowledge about current dementia care in Sweden and serves as a framework for ensuring the quality of diagnostics, treatment and care across the country. It also reflects changes in quality dementia care over time. Data from SveDem can be used to further develop the national guidelines for dementia and to generate new research hypotheses.

Steueroptimierte Alters- und Berufsunfähigkeitsvorsorge nach dem Alterseinkünftegesetz

OpenAIRE

Eberhardt, Michael G.

2007-01-01

Eine höhere Lebenserwartung bei gleichzeitiger Überalterung der deutschen Gesellschaft sind maßgebliche Gründe eines heute bereits festzustellenden Defizits der gesetzlichen Rentenversicherung. Die jüngste Rentenreform mit dem Altersvermögens- und Alterseinkünftegesetz setzte deshalb maßgebliche Anreize, die Alterssicherung eigenverantwortlich um eine private, staatlich geförderte Vorsorge zu ergänzen. Jedoch mangelt es derzeit vorwiegend an einer fachkundigen Informations- und Beratungsleist...

Toward the modeling of combustion reactions through discrete element method (DEM) simulations

Science.gov (United States)

Reis, Martina Costa; Alobaid, Falah; Wang, Yongqi

2018-03-01

In this work, the process of combustion of coal particles under turbulent regime in a high-temperature reaction chamber is modeled through 3D discrete element method (DEM) simulations. By assuming the occurrence of interfacial transport phenomena between the gas and solid phases, one investigates the influence of the physicochemical properties of particles on the rates of heterogeneous chemical reactions, as well as the influence of eddies present in the gas phase on the mass transport of reactants toward the coal particles surface. Moreover, by considering a simplistic chemical mechanism for the combustion process, thermochemical and kinetic parameters obtained from the simulations are employed to discuss some phenomenological aspects of the combustion process. In particular, the observed changes in the mass and volume of coal particles during the gasification and combustion steps are discussed by emphasizing the changes in the chemical structure of the coal. In addition to illustrate how DEM simulations can be used in the modeling of consecutive and parallel chemical reactions, this work also shows how heterogeneous and homogeneous chemical reactions become a source of mass and energy for the gas phase.

Ambient Dried Aerogels

Science.gov (United States)

Jones, Steven M.; Paik, Jong-Ah

2013-01-01

A method has been developed for creating aerogel using normal pressure and ambient temperatures. All spacecraft, satellites, and landers require the use of thermal insulation due to the extreme environments encountered in space and on extraterrestrial bodies. Ambient dried aerogels introduce the possibility of using aerogel as thermal insulation in a wide variety of instances where supercritically dried aerogels cannot be used. More specifically, thermoelectric devices can use ambient dried aerogel, where the advantages are in situ production using the cast-in ability of an aerogel. Previously, aerogels required supercritical conditions (high temperature and high pressure) to be dried. Ambient dried aerogels can be dried at room temperature and pressure. This allows many materials, such as plastics and certain metal alloys that cannot survive supercritical conditions, to be directly immersed in liquid aerogel precursor and then encapsulated in the final, dried aerogel. Additionally, the metalized Mylar films that could not survive the previous methods of making aerogels can survive the ambient drying technique, thus making multilayer insulation (MLI) materials possible. This results in lighter insulation material as well. Because this innovation does not require high-temperature or high-pressure drying, ambient dried aerogels are much less expensive to produce. The equipment needed to conduct supercritical drying costs many tens of thousands of dollars, and has associated running expenses for power, pressurized gasses, and maintenance. The ambient drying process also expands the size of the pieces of aerogel that can be made because a high-temperature, high-pressure system typically has internal dimensions of up to 30 cm in diameter and 60 cm in height. In the case of this innovation, the only limitation on the size of the aerogels produced would be in the ability of the solvent in the wet gel to escape from the gel network.

Historic Low Wall Detection via Topographic Parameter Images Derived from Fine-Resolution DEM

Directory of Open Access Journals (Sweden)

Hone-Jay Chu

2017-11-01

Full Text Available Coral walls protect vegetation gardens from strong winds that sweep across Xiji Island, Taiwan Strait for half the year. Topographic parameters based on light detection and ranging (LiDAR-based high-resolution digital elevation model (DEM provide obvious correspondence with the expected form of landscape features. The information on slope, curvature, and openness can help identify the location of landscape features. This study applied the automatic landscape line detection to extract historic vegetable garden wall lines from a LiDAR-derived DEM. The three rapid processes used in this study included the derivation of topographic parameters, line extraction, and aggregation. The rules were extracted from a decision tree to check the line detection from multiple topographic parameters. Results show that wall line detection with multiple topographic parameter images is an alternative means of obtaining essential historic wall feature information. Multiple topographic parameters are highly related to low wall feature identification. Furthermore, the accuracy of wall feature detection is 74% compared with manual interpretation. Thus, this study provides rapid wall detection systems with multiple topographic parameters for further historic landscape management.

CUIDADO AMBIENTAL E RESPONSABILIDADE: POSSÍVEL DIÁLOGO ENTRE PSICOLOGIA AMBIENTAL E LOGOTERAPIA

Directory of Open Access Journals (Sweden)

Diogo Arnaldo Corrêa

2016-05-01

Full Text Available O cuidado ambiental vem sendo marcado pela tônica da conservação e da promoção da sustentabilidade. A premente necessidade de um dado compromisso e educação ambiental e de condutas pró-ambientais vem sendo defendida em vários contextos: na mídia, nas políticas públicas, por meio de campanhas sazonais. Todavia, pouco se descreve acerca do sentido presente nos modos de cuidado configurados a partir da inter-relação pessoa-ambiente. Nesta perspectiva, este estudo objetivou promover um possível diálogo a partir das contribuições da Psicologia Ambiental e da Logoterapia visando aproximar a noção de cuidado ambiental, delineada pela Psicologia Ambiental, à ideia de responsabilidade, como defendida pela Logoterapia, por meio de uma revisão bibliográfica. As articulações propositadas corroboraram, portanto, para acenar que a relação pessoa-ambiente pode ser arraigada em qualidade se a responsabilidade é reconhecida em sua propriedade de potencial humano, o que pode favorecer na emergência do sentido das atitudes e condutas pró-ambientais e explicitar o caráter de tarefa única e irrepetível inerente à vida.

Extraction of multi-scale landslide morphological features based on local Gi* using airborne LiDAR-derived DEM

Science.gov (United States)

Shi, Wenzhong; Deng, Susu; Xu, Wenbing

2018-02-01

For automatic landslide detection, landslide morphological features should be quantitatively expressed and extracted. High-resolution Digital Elevation Models (DEMs) derived from airborne Light Detection and Ranging (LiDAR) data allow fine-scale morphological features to be extracted, but noise in DEMs influences morphological feature extraction, and the multi-scale nature of landslide features should be considered. This paper proposes a method to extract landslide morphological features characterized by homogeneous spatial patterns. Both profile and tangential curvature are utilized to quantify land surface morphology, and a local Gi* statistic is calculated for each cell to identify significant patterns of clustering of similar morphometric values. The method was tested on both synthetic surfaces simulating natural terrain and airborne LiDAR data acquired over an area dominated by shallow debris slides and flows. The test results of the synthetic data indicate that the concave and convex morphologies of the simulated terrain features at different scales and distinctness could be recognized using the proposed method, even when random noise was added to the synthetic data. In the test area, cells with large local Gi* values were extracted at a specified significance level from the profile and the tangential curvature image generated from the LiDAR-derived 1-m DEM. The morphologies of landslide main scarps, source areas and trails were clearly indicated, and the morphological features were represented by clusters of extracted cells. A comparison with the morphological feature extraction method based on curvature thresholds proved the proposed method's robustness to DEM noise. When verified against a landslide inventory, the morphological features of almost all recent (historical (> 10 years) landslides were extracted. This finding indicates that the proposed method can facilitate landslide detection, although the cell clusters extracted from curvature images should

Magnetisches Tracking für die Navigation mit dem da Vinci® Surgical System

Science.gov (United States)

Nickel, Felix; Wegner, Ingmar; Kenngott, Hannes; Neuhaus, Jochen; Müller-Stich, Beat P.; Meinzer, Hans-Peter; Gutt, Carsten N.

In dieser Studie wurde untersucht ob in einem typischen OP-Aufbau mit dem da Vinci® Telemanipulator elektromagnetisches Tracking für die Realisation eines Navigationssystems eingesetzt werden kann. Hierfür wurde in einem realen OP-Aufbau untersucht, wie stark metallische und ferromagnetisch wirksame Objekte wie Operationstisch und Telemanipulator das elektromagnetische Feld des Trackingsystems beeinflussen. Die Ergebnisse zeigen, dass der Telemanipulator nur unwesentlich die Störung des Magnetfeldes durch den OP-Tisch verstärkt. Insbesondere die Bewegung der Instrumente im Trackingvolumen verursachte keine zusätzliche relevante Störung des Magnetfeldes. Bei Begrenzung des Trackingvolumens auf eine Länge von 190 mm, Höhe von 200mm und Breite von 400 mm war der maximale Fehler in diesem Bereich an allen Messpunkten kleiner 10 mm. Der Einsatz von elektromagnetischem Tracking für die Navigation mit dem da Vinci® Surgical System ist somit in einem begrenzten Arbeitsvolumen mit hinreichender Genauigkeit möglich.

Die Struktur der Handgesten im indischen Tanz nach dem „Nāṭya-Śāstra“ des Bharata (NŚBh)

OpenAIRE

Müller, Biliana

2008-01-01

In der vorliegenden Untersuchung wird eine Strukturanalyse der Gestensprache im indischen Tanz nach einem schriftlich vorliegenden Text vorgeschlagen – dem neunten Kapitel des ‚Nāṭya-Śāstra‘ eines legendären Autors namens Bharata. Der untersuchte Text ist Zeugnis für ein Zeichensystem, das über mehr als zwei Jahrtausende als Basis für die symbolische Interaktion auf dem indischen Subkontinent gedient hat und heute in zahlreichen Variationen präsent ist. Dieses Zeichensystem ist im semiotische...

Driver's glance behaviour and secondary tasks; Einfluss von Nebenaufgaben auf das Fahrerblickverhalten

Energy Technology Data Exchange (ETDEWEB)

Schweigert, M. [BMW Group Forschung und Technik, Muenchen (Germany); Bubb, H. [TU Muenchen, Garching (Germany). Lehrstuhl fuer Ergonomie

2003-07-01

This paper contains a proposal for the evaluation of drivers' glance behavior, focussing on the influence of secondary tasks during driving. In general, an evaluation can only be achieved by regarding the quality of a task completion, which can be calculated by a comparison of a measured, actual value or behavior and a defined target value or behavior. Due to this definition, a target glance behavior is defined by so called continous and situational visual tasks. As opposed to continuous visual tasks, situational visual tasks contain a concrete description for a target glance behavior. A field trial (N=30) showed, that the subjects' glance behavior fulfilled most of the defined visual tasks when driving without a secondary task. Driving with secondary tasks leads to an increasing subjects' reliance on the correct driving of the other road users, shown by decreasing visual monitoring. (orig.) [German] Die vorliegende Untersuchung behandelt die Bewertung des Blickverhaltens von Fahrzeugfuehrern, wobei das Hauptaugenmerk auf dem Einfluss von Zusatzaufgaben liegt, die waehrend der Fahrt zu bearbeiten sind. Eine Bewertung ist immer eng mit dem Begriff der Qualitaet verknuepft, wobei ein Ist-Wert mit einem vorgegebenen Soll-Wert zu vergleichen ist. Nur wenn die Abweichung zwischen Soll und Ist gering ist, ist die Qualitaet hoch und die Bewertung somit positiv. Bei der Definition eines Soll-Blickverhaltens wird hier zwischen kontinuierlichen und situativen visuellen Aufgaben unterschieden. Letztere beinhalten konkrete Forderungen an das Fahrerblickverhalten in bestimmten Situationen, waehrend sich die Vorgabe eines Soll-Werts fuer kontinuierliche Aufgaben einer genauen Quantifizierung weitestgehend entzieht. Im Feldversuch (N=30) konnte gezeigt werden, dass bei den Fahrten ohne Zusatzaufgabenbearbeitung (Referenzbedingung) die definierten visuellen Aufgaben zum Grossteil erfuellt werden. Ist der Fahrer jedoch durch Zusatzaufgaben beansprucht, verlaesst er

"Aparat" čy "dyspozytyv"? Notatky pro vyrobnyctvo obrazu i vyrobnyctvo sub''jekta v kino

Directory of Open Access Journals (Sweden)

Ol'ha Briukhovets'ka

2015-09-01

Während der Begriff "Apparatus" in der Filmtheorie gut etabliert ist, ging sein Pendant und zugleich korrelatives Double "Dispositiv" (ebenfalls in die Filmtheorie von Jean-Louis Baudry in den 1970er Jahren eingeführt, bei der Übersetzung aus dem Französischen ins Englische verloren. So verschwand auch der nuancierte Bedeutungsunterschied zwischen den beiden Begriffen, und damit die Unterscheidung von zwei Prozessen – einem, der sich auf die Bildproduktion bzw. die Figuration bezieht, und einem anderen, bei dem es um die Subjektproduktion bzw. die Subjektwerdung geht. Der Begriff "Dispositiv" tauchte in der Filmtheorie gelegentlich als Ersatz für den Begriff oder die Theorie des "Apparatus" auf. Der Beitrag beabsichtigt, die ursprüngliche Unterscheidung zwischen den beiden Begriffen wieder herzustellen und ein mögliches Vorgehen nicht nur für die Filmtheorie, sondern auch für die Analyse bestimmter Filme aufzuzeigen. Am Beispiel von zwei Filmen, Tini zabutich predkiv / Schatten der vergessenen Vorfahren (Sergij Paradžanov, 1965, Sowjetunion und Bol’šaja žizn’. Vtoraja čast’ / Das große Leben. Zweiter Teil  (Leonid Lukov, 1946, Sowjetunion wird gezeigt, wie die beiden Begriffe "Apparatus" und "Dispositiv" in konkreten filmischen Texten angewandt werden könnten. Schatten der vergessenen Vorfahren wurde mit proto-faschistischen Bergfilmen verglichen, wenn auch nur auf der Ebene des "Produktionsdramas",  um zu zeigen, wie durch das optische Unbewusste des Apparatus, der Bildproduktion und der Figuration das ethnisch Andere zurückgewiesen wird. Die Dezentrierung des Bildes, welche die grundlegenden, ungeschriebenen Regel des Anthropozentrismus verletzt, entblößt am Ende von Das große Leben. Zweiter Teil ein stalinistisches Dispositiv, seine spezifische Generierung des Subjekts und dessen Interpellation.

Idiopathic interstitial pneumonias. From classification to diagnostic work-up; Idiopathische interstitielle Pneumonien. Von der Klassifikation zur Diagnostik

Energy Technology Data Exchange (ETDEWEB)

Mueller-Mang, C.; Bankier, A. [Medizinische Universitaet, Universitaetsklinik fuer Radiodiagnostik, Wien (Austria); Stiebellehner, L. [Medizinische Universitaet, Klinische Abteilung fuer Pulmologie, Universitaetsklinik fuer Innere Medizin, Wien (Austria); Schmid, K. [Medizinische Universitaet, Klinisches Institut fuer Pathologie, Wien (Austria)

2007-05-15

Idiopathic interstitial pneumonias (IIP) comprise seven entities with distinct histologic patterns. In their idiopathic form IIP are rare diseases. They are, nevertheless, considered prototypes of the much more common secondary interstitial pneumonias. The advent of high-resolution computed tomography (HRCT) has had a profound impact on the imaging of IIP, because the detailed delineation of the lung anatomy allows a close correlation between the histologic patterns of IIP and the CT features. On the basis of CT morphology and in the correct clinical context, the radiologist can achieve an accurate diagnosis in many cases. However, due to overlap between the various entities, complementary lung biopsy is recommended in virtually all cases. This article reviews the CT pattern of IIP and offers relevant clinical and histological information for the purpose of enabling the radiologist to understand and participate in the multidisciplinary concept of IIP. (orig.) [German] Die Bezeichnung idiopathische interstitielle Pneumonien (IIP) umfasst 7 Entitaeten mit definierten histologischen Mustern. In ihrer idiopathischen Form sind die interstitiellen Pneumonien selten, allerdings werden die einzelnen Muster als Prototypen fuer die haeufigeren sekundaeren interstitiellen Pneumonien betrachtet. Mit der Einfuehrung der hochaufloesenden Computertomographie (HRCT) hat die Bildgebung der IIP einen deutlichen Aufschwung erfahren, da durch die detaillierte Darstellung der Lungenanatomie eine sehr gute Korrelation zwischen den histologischen Mustern der IIP und den CT-Veraenderungen gegeben ist. Der Radiologe kann anhand der CT-Morphologie und unter Beruecksichtigung der Klinik des Patienten in vielen Faellen eine korrekte Diagnose erstellen. Dennoch wird aufgrund von Ueberlappungen zwischen den verschiedenen Entitaeten bei nahezu allen Formen der IIP eine ergaenzende Lungenbiopsie empfohlen. Dieser Uebersichtsartikel veranschaulicht die verschiedenen CT-Merkmale der IIP und

Ressourceneffiziente Produktion - Innovationsallianz Green Carbody Technologies: Vortrag gehalten auf dem 11. Cottbuser Leichtbauworkshop, Energie als Ressource, 28. und 29. Mai 2013, Cottbus

OpenAIRE

Putz, Matthias

2013-01-01

Produktionstechnik im Wandel, "Treiber" für Energie- und Ressourceneffizienz. Die Produktionstechnik muss sich den Herausforderungen Endlichkeit von fossilen Ressourcen, demografischer Wandel, Klimawandel, steigender Verbrauch an Elektrizität, Globalisierung und Wohlstand, unter dem Ansatz der Machbarkeit der Effizienz, stellen. Mit dem E3-Konzept -effiziente Produktionstechnik, emissionsneutrale, energieautarke Fabrik, Einbindung des Menschen- forscht die FHG an Lösungen für eine ressourcene...

Evaluation of the influence of source and spatial resolution of DEMs on derivative products used in landslide mapping

Directory of Open Access Journals (Sweden)

Rubini Mahalingam

2016-11-01

Full Text Available Landslides are a major geohazard, which result in significant human, infrastructure, and economic losses. Landslide susceptibility mapping can help communities plan and prepare for these damaging events. Digital elevation models (DEMs are one of the most important data-sets used in landslide hazard assessment. Despite their frequent use, limited research has been completed to date on how the DEM source and spatial resolution can influence the accuracy of the produced landslide susceptibility maps. The aim of this paper is to analyse the influence of spatial resolutions and source of DEMs on landslide susceptibility mapping. For this purpose, Advanced Spaceborne Thermal Emission and Reflection (ASTER, National Elevation Dataset (NED, and Light Detection and Ranging (LiDAR DEMs were obtained for two study sections of approximately 140 km2 in north-west Oregon. Each DEM was resampled to 10, 30, and 50 m and slope and aspect grids were derived for each resolution. A set of nine spatial databases was constructed using geoinformation science (GIS for each of the spatial resolution and source. Additional factors such as distance to river and fault maps were included. An analytical hierarchical process (AHP, fuzzy logic model, and likelihood ratio-AHP representing qualitative, quantitative, and hybrid landslide mapping techniques were used for generating landslide susceptibility maps. The results from each of the techniques were verified with the Cohen's kappa index, confusion matrix, and a validation index based on agreement with detailed landslide inventory maps. The spatial resolution of 10 m, derived from the LiDAR data-set showed higher predictive accuracy in all the three techniques used for producing landslide susceptibility maps. At a resolution of 10 m, the output maps based on NED and ASTER had higher misclassification compared to the LiDAR-based outputs. Further, the 30-m LiDAR output showed improved results over the 10-m NED and 10-m

VT Data - Lidar Hydro-flattened DEM (0.7m) 2016, Essex, Caledonia, Orange, and Windsor Counties

Data.gov (United States)

Vermont Center for Geographic Information — (Link to Metadata) This metadata applies to the following collection area(s): Middle CT River subbasin 2016 0.7m and Digital Elevation Model (DEM) dataset of the...

Energy conservation by optimisation of the mode of operation of a flue gas desulfurisation plant; Energieeinsparung durch Optimierung der Spruehebenenfahrweise einer Rauchgasentschwefelungsanlage

Energy Technology Data Exchange (ETDEWEB)

Wilken, F.; Staus, J.

2001-07-01

The contribution describes how the energy consumption of absorbers in flue gas desulphurisation systems can be reduced. A 15% reduction is considered realistic. [German] Im vorliegenden Vortrag wird vorgestellt, wie mit Mitteln der Online-Betriebsoptimierung der Eigenenergiebedarf von Absorbern in Rauchgasentschwefelungsanlagen deutlich reduziert werden kann. Einleitend wird zunaechst der Energieaufwand bei der Entschwefelung mit Nasswaeschem nach dem Kalkstein/Gips-Verfahren beschrieben. Daraus wird die Aufgabenstellung fuer ein Optimierungsprogramm und der Loesungsansatz zur Modellierung des Betriebsverhaltens abgeleitet. Ein Vergleich zwischen gemessenem und modelliertem Betriebsverhalten belegt die ausgezeichnete Eignung der gewaehlten Berechnungsansaetze. Die abschliessend vorgestellten Betriebsergebnisse bei Einsatz des Programms zeigen, dass an der betrachteten Anlage eine Reduzierung des Eigenenergiebedarfs um ca. 15% erreicht werden konnte. (orig.)

Frauen der Heine-Zeit Women of the Heine Era

Directory of Open Access Journals (Sweden)

Mechthilde Vahsen

2003-07-01

Full Text Available Der Sammelband stellt 26 Frauen aus der Zeit zwischen dem Ende des 18. und der ersten Hälfte des 19. Jahrhunderts vor. Es handelt sich um Schriftstellerinnen, Publizistinnen, Künstlerinnen, Sängerinnen, eine Hausangestellte und eine Ärztin. Die einzelnen Beiträge bieten neue Perspektiven und wichtige Ergebnisse nicht nur für die Frauenforschung zum 19. Jahrhundert.This anthology introduces 26 women who lived between the late 18th century and the first half of the 19th century. These women were writers, publishers, artists, singers, one maid, and a medical doctor. The individual contributions offer new perspectives and findings that are relevant to research on 19th century women and beyond.

Discrete element simulation of mill charge in 3D using the BLAZE-DEM GPU framework

CSIR Research Space (South Africa)

Govender, Nicolin

2015-08-01

Full Text Available The Discrete Element Method (DEM) simulation of charge motion in ball, semi autogenous (SAG) and autogenous mills has advanced to a stage where the effects of lifter design, power draft and product size can be evaluated with sufficient accuracy...

Prevalência de demência em diversas regiões do mundo: Análise dos estudos epidemiológicos de 1994 a 2000

Directory of Open Access Journals (Sweden)

Lopes Marcos A.

2002-01-01

Full Text Available OBJETIVO: Analisar os estudos de prevalência de demência, no período de 1994 a 2000. MÉTODOS: Foram utilizadas as bases de dados Medline e Lilacs e os seguintes critérios de inclusão: constituir artigo original, estimar prevalência de demência e utilizar amostra comunitária. RESULTADOS: Foram avaliados 38 artigos, originários de todos os continentes. A idade exerceu importante influência sobre os resultados, com taxas médias de prevalência de demência que variaram de 1,17% na faixa de 65-69 anos, a 54,83% na faixa acima de 95 anos. Houve predomínio do sexo feminino em 75% dos estudos avaliados. A relação doença de Alzheimer/demência vascular foi maior na América do Sul e menor na Ásia. DISCUSSÃO: Ocorreram avanços metodológicos, sobretudo com relação à maior homogeneidade dos critérios diagnósticos. O efeito da idade sobre o aumento das taxas de prevalência foi pronunciado, principalmente até os 90 anos de idade.

Comeniana aus dem Nachlass von Dietrich Mahnke. Die Korrespondenz zwischen Dietrich Mahnke und Dmitrij Tschižewskij aus dem Jahre 1935. Beilage: die Korrespondenz

Czech Academy of Sciences Publication Activity Database

Schifferová, Věra

18/42/, - (2004), s. 219-223 ISSN 0231-5955 Institutional research plan: CEZ:AV0Z9009908 Keywords : The interpretation of Comenius * the pupils of Edmund Husserl * rationalism and mysticism Subject RIV: AA - Philosophy ; Religion

Pedagogía ambiental y didáctica ambiental: tendencias en la educación superior

Directory of Open Access Journals (Sweden)

Julio César Tovar-Gálvez

2017-01-01

Full Text Available El artículo aborda el problema del currículo de educación ambiental en la educación superior, para lo que se centra en los conceptos pedagogía ambiental y didáctica ambiental. La metodología consiste en realizar un estado del arte para identificar las tendencias existentes sobre pedagogía ambiental y didáctica ambiental, para desde allí diseñar una encuesta que es dirigida a profesores y estudiantes de programas con formación en lo ambiental, de algunas universidades en Bogotá, con el objetivo de identificar sus opiniones como expertos en lo ambiental. Los resultados muestran un especial énfasis en las tendencias sobre la complejidad, pero así mismo plantean la posibilidad de múltiples modelos según los contextos y necesidades.

La{sub 0,7}Sr{sub 0,3}MnO{sub 3} thin layers on SrTiO{sub 3}(001) substrate. Structure and Mn valence; La{sub 0,7}Sr{sub 0,3}MnO{sub 3}-Duennschichten auf SrTiO{sub 3}(001)-Substrat. Struktur und Mn-Wertigkeit

Energy Technology Data Exchange (ETDEWEB)

Riedl, Thomas

2007-07-01

This thesis presents a highly spatially resolved characterization of crystal structure and Mn valence by pictures drawn in the TEM and electron-energy-loss ionization edges. The Mn valence determined for the internal od the studied LSMO layers agrees with the nomial value of 3.3, while on some LSMO/STO interfaces between substrate and layers as well as between multilayers a reduction by 0.1..0.2 is to be observed. Furthermore the influence of the interface manifests in the occurence of a shoulder on the side of lower energy loss of the Mn L3 edge. The geometrical phase analysis of HRTEM pictures and TEM bright-field pictures prove a tetragonal strain of th LSMO layer crystals, which consist of needle-shaped twin domains. From highly resolved scanning TEM pictures by electrons scattered under large angle results that the LSMO/STO interface exhibit a coherent lattice structure accidentally provided with elementary-cell stages. Especially the stages (single- or multi-stages) mediate the wavy structure of the LSMO/STO interlayers. Finally it is shown that at low thicknes of the TEM lamella the expected crystal-plane inclination exceeds the expected crystal-plane inclination of the twins. [German] Diese Arbeit stellt eine hoch ortsaufgeloeste Charakterisierung von Kristallstruktur und Mn-Wertigkeit mit im TEM aufgezeichneten Abbildungen und Elektronen-Energieverlust-Ionisationskanten vor. Die fuer das Innere der untersuchten LSMO-Schichten ermittelte Mn-Wertigkeit stimmt mit dem nominalen Wert von 3,3 ueberein, wohingegen an manchen LSMO/STO-Grenzflaechen zwischen Substrat und Schicht sowie zwischen den Schichten von Multilagen eine Reduktion um 0,1...0,2 zu beobachten ist. Weiterhin aeussert sich der Einfluss der Grenzflaeche in dem Auftreten einer Schulter an der Flanke geringeren Energieverlusts der Mn-L3-Kante. Die geometrische Phasenanalyse von HRTEM-Aufnahmen und TEM-Hellfeldaufnahmen belegen eine tetragonale Verzerrung des LSMO-Schichtkristalls, der aus

Teatras popieriaus lape: Egono Schiele’s ekspresionistiniai autoportretai | Das Theater auf dem Papierblatt: zu den expressionistischen Selbstbildnissen von Egon Schiele

Directory of Open Access Journals (Sweden)

Dalia Kolytaitė

2004-01-01

Full Text Available Im Werk von Egon Schiele ist der Körper (besonders sein eigener mit seinen mannigfaltigen Ausdrucksformen ein zentrales Thema. Die stark ausgeprägte und sehr spezifische Körpersprache entwickelte der Künstler vor dem Spiegel, wovon nicht nur biographische Daten, sondern auch Photos zeugen. Mit dem ausdrucksvollen Variieren seines Körpers präsentiert Schiele seine Neigung zum Wechseln der Identität, der Rollen, des Selbst, wobei er sich gleichzeitig in drei Positionen befindet: des Darstellers, des Regisseurs und des Zuschauers.Als Objekt der Analyse wurden die sechs Selbstbildnisse ausgewählt: „Selbstbildnis mit kariertem Hemd“ (1917, „Der Prediger (Selbstbildnis“ (1913, „Der Kämpfer (Selbstbildnis“ (1913, „Sitzender männlicher Akt (Selbstbildnis“ (1917, „Der Tänzer (Selbstbildnis“ (1911, „Männlicher Halbakt mit rotem Lendentuch (Selbstbildnis“ (1914. Sie stellen verschiedene plastischen Konfigurationen des Körpers im Raum dar. Obwohl diese Bilder in unterschiedlichen Jahren entstanden sind, lassen sich alle sechs Selbstbildnisse aufgrund der ähnlichen Darstellungsweise, Manier und derselben Technik als ein Pantomimestück betrachten. Für eine solche Betrachtungsweise spricht nicht nur die visuelle Assoziation – der Körper in allen Bildern stellt gleichsam stillgestellte Fragmente einer Bewegung dar, wie man dies bei den Photoherausgaben von Pantomimen oder beim Drehen eines Stummfilmes (sie haben ja die gleichen Elemente Bild und Bewegung beobachten kann. Den Anstoß für eine solche Behauptung gibt die Kunstgattung der Pantomime selbst. Sie ist ja „die große schweigende Kunst“, „das Spiel des bewusst bewegten Körpers“, „die Kunst der Form“, und das „Material, aus dem diese Form geschaffen wird, ist der menschliche Körper“. Schieles Selbstbildnisse entsprechen ihren Grundforderungen: dem begrenzten Raum, der Beleuchtung, dem eng am Körper anliegenden Kostüm, der sehr pers

POLÍTICA PÚBLICA AMBIENTAL Y AMBIENTE EN EL VALLE DEL CAUCA, 1991-2010

Directory of Open Access Journals (Sweden)

Álvaro Quiceno Martínez

2010-01-01

Full Text Available La política pública ambiental en el Valle del Cauca, a partir de 1991, va en contravía de la conservación ambiental al enfatizar en el crecimiento económico, la generación de plusvalía y la ampliación de la tasa de ganancia. Para la realización de esta investigación se adoptó como herramienta metodológica la revisión bibliográfica. Se halló que la política pública ambiental en el Valle se ha orientado a subsidiar monetaria, ecológica, ambiental y socialmente al sector cañicultor. Se concluye que dicha política ha contribuido al desequilibrio ecológico y al deterioro ambiental.

Ambiente e justiça: sobre a utilidade do conceito de racismo ambiental no contexto brasileiro

OpenAIRE

Silva, Lays Helena Paes e

2013-01-01

A ideia de crise ambiental suscita discussões a respeito de distintas concepções de natureza e de ambiente e das disputas simbólicas e materiais neste meio. Uma concepção que toma sociedade e ambiente como pares inseparáveis levou à emergência, nos Estados Unidos, de movimentos que introduziram conceitos como justiça ambiental e racismo ambiental. No Brasil, surgiram movimentos e estudos focados nas mesmas bandeiras de luta e nos mesmos conceitos. Considerando as especificidades do racismo no...

To measure ammonia and the ammonium-ion in high concentrations with sensitrodes; Messreihen mit Ammoniak- und Ammonium-Sensitroden in ungewoehnlich hohen Konzentrationsbereichen

Energy Technology Data Exchange (ETDEWEB)

Brosche, P. [DBI-EWI GmbH, Freiberg (Germany)

1996-08-01

Ammonia up to 8 Mol/kg and the ammonium-ion up to 5 Mol/kg were investigated by sensitrodes. Sensitrodes of different manufacturers, the influence of different salts, the temperature (25 and 50 C) and ammonia in mixture with the ammonium-ion were assessed in respect of the result for measuring. The functional correlation between the pH-value and the logarithmus for the ratio of ammonium-ion to ammonia in respect of the equation from Henderson and Hasselbalch was examined. The given concentration for ammonia respectively the ammonium-ion was compared with the calculated concentration of the calibration curve. The investigated sensitrodes may be installed in the manufacturing of ammonium salts in mixture with ammonia as measuring and controlling unit. (orig.) [Deutsch] Ammoniak bis 8 mol/kg und das Ammoniumion bis 5 mol/kg wurden mittels Sensitroden untersucht. Bewertet wurden Sensitroden verschiedener Hersteller, der Einfluss von Salzen, der Temperatur (25 und 50 C) und Ammoniak im Gemisch mit dem Ammoniumion auf das Messergebnis. Der funktionale Zusammenhang zwischen dem pH-Wert und dem Logarithmus des Verhaeltnisses von Ammoniumion und Ammoniak entsprechend der Gleichung von Henderson und Hasselbalch wurde untersucht. Die eingegebenen Konzentrationen an Ammoniak bzw. des Ammoniumions wurden mit den aus den Kalibrierungskurven errechneten Konzentrationen verglichen. Die untersuchten Sensitroden koennen in der Produktion von Ammoniumsalzen im Gemisch mit Ammoniak als Mess- und Steuergeraet eingesetzt werden. (orig.)

Research of the fluid flow in a radially orientated coolant channel of a turbine blade; Untersuchung der Stroemung in einem radial gerichteten Kuehlkanal eines Turbinenlaufrades

Energy Technology Data Exchange (ETDEWEB)

Hein, O.

1999-07-01

Due to rotation (Coriolis forces) in a coolant channel a secondary flow is superimposed to the basic flow. This leads to a change in the local heat transfer over the surface of the coolant channel as well as a change in the overall value of the heat transfer. Also the pressure loss over the channel length will change by rotation. By means of computational fluid dynamics (Finite Element Method) it was achieved to figure out the interaction between changing fluid flow and heat transfer. To validate the results obtained by a numerical flow simulation, a new measurement technique was developed. A laser-two-focus velocimeter has been combined with a rotation prism which allows continued measurements in a rotating scaled up channel. (orig.) [German] Bedingt durch die Rotationsbewegung eines Kuehlkanals wird die Grundstroemung von einem Sekundaerwirbel ueberlagert (Corioliskraefte). Durch diese Einfluesse aendert sich sowohl der lokale Waermeuebergang ueber der Kanaloberflaeche als auch die globalen Waermeuebertragungsraten ueber dem gesamten Kanal. Ebenfalls aendert sich durch die Rotation der Druckverlust ueber der Kanallaenge. Durch eine numerische Stroemungssimulation (Finite-Element-Methode) war es moeglich, einen detaillierten Zusammenhang zwischen dem veraenderten Stroemungsverhalten und dem Waermeuebertragungsverhalten darzustellen. Um die numerisch gewonnenen Ergebnisse experimentell abzusichern, wurde eine neuartige Messtechnik entwickelt. Ein Laser-2-Fokus-Velozimeter wurde mit einem Bilddrehprisma kombiniert, und dies erlaubte eine kontinuierliche Messung in einem rotierenden vergroesserten Modellkanal. (orig.)

Wie viel muss ich wissen, um global handeln zu können? Verantwortung für Weltarmut und das Problem der epistemischen Überforderung

Directory of Open Access Journals (Sweden)

Weber-Guskar Eva

2015-12-01

Full Text Available Was heißt es, sich in unserer globalisierten Welt als eine vollverantwortliche Person zu verstehen und zu verhalten? Einerseits scheint es richtig, dass wir global verantwortlich sind, d.h. dass wir auch gegen entferntes Leid etwas tun sollten; andererseits aber ist wegen vielfacher Überforderungsproblemen unklar ist, wie man diese Verantwortung tatsächlich übernehmen können soll – was wiederum dagegen spricht, dass wir diese Verantwortung berechtigtermaßen zuschreiben können. Um einen Aspekt dieses großen Themas zu behandeln, konzentriere ich mich in diesem Aufsatz auf den Anwendungsbereich von extremer Armut und argumentiere in folgenden Schritten. Zuerst spitze ich das Thema zu auf ein Problem, das Samuel Scheffler in diesem Zusammenhang konstatiert hat, nämlich einen Widerstreit zwischen dem, was Verantwortung unter den Bedingungen der Globalisierung bedeutet und dem, wie wir uns grundsätzlich als Handelnde zu verstehen gewohnt sind. Dann zeige ich erstens, dass dem Thema einer epistemischen Überforderung dabei entscheidendes Gewicht zugesprochen wird, zweitens jedoch, dass sich, genauer besehen, dieses Problem gar nicht in dieser Art stellt. Dafür schlage ich eine Analyse des Verantwortungsbegriffs vor, die es ermöglicht, Kriterien zu identifizieren, anhand derer gewisse Grenzen gezogen werden können, so dass die Zuschreibung der Verantwortung gerechtfertigt werden kann.

„Sprache, du heilige“: Sprachreflexionen in der deutschen Dichtung der Bukowina

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Petro Rychlo

2017-12-01

Full Text Available Der Aufsatz befasst sich mit der historischen und kulturellen Rolle der deutschen Sprache in der Bukowina, wo sie zwischen 1875 und 1918 den Status einer offiziellen Staats- und Umgangssprache hatte und sogar nach dem Zerfall der Habsburgermonarchie noch eine Zeitlang auf verschiedenen Ebenen funktionierte. Das verursachte in der Bukowina und besonders in ihrer Hauptstadt Czernowitz die Herausbildung einer deutschsprachigen Literatur, deren Anfänge in die Mitte des 19. Jahrhundert fallen. Zuerst nur als „Heimatliteratur“ begriffen, entwickelte sie sich bald, vor allem auf dem Gebiet der lyrischen Dichtung, zu einem beachtlichen literarischen Phänomen, das in der Zwischenkriegszeit im Werk solcher Dichter wie Alfred Margul-Sperber, Rose Ausländer, David Goldfeld, Alfred Kittner, Moses Rosenkranz, Immanuel Weißglas, Paul Celan, Alfred Gong, Selma Meerbaum-Eisinger ihre höchste Blüte erlebte. Infolge der fortschreitenden Romanisierung des Landes und der Bedrohung des Sprachverlusts greifen um diese Zeit viele Czernowitzer deutschjüdische Dichter öfters zur Sprachproblematik, indem sie sie in ihren Gedichten im tragischen Sinne thematisieren. Nach dem Holocaust und der Emigration aus der Bukowina verwandelt sich die Muttersprache für verbannte Dichter in ein Synonym der Heimat („Mutterland Wort“. Der Artikel analysiert Sprachreflexionen der Czernowitzer Autoren als Strategie des kulturellen und existenziellen Überlebens.

Rechargable Lithium-Air Batteries: Investigation of Redox Mediators Using DEMS

DEFF Research Database (Denmark)

Christensen, Mathias Kjærgård; Storm, Mie Møller; Norby, Poul

2016-01-01

material or electrolyte is being decomposed. This is also seen with Thermally reduced Graphene Oxide (TrGO). The graphene based cathode is interesting as it exhibits a high surface area which in turn increases capacity. Using the additive LiI, functioning as a redox mediator, the discharge curve remains...... is observed without the redox mediator [2]. This results in higher energy densities and ideally higher cyclability due to the lower over-potentials. Using DEMS we have investigated the gas evolved in the process to determine the electron to oxygen ratio using both cathode materials mentioned. As has been...

An automated, open-source pipeline for mass production of digital elevation models (DEMs) from very-high-resolution commercial stereo satellite imagery

Science.gov (United States)

Shean, David E.; Alexandrov, Oleg; Moratto, Zachary M.; Smith, Benjamin E.; Joughin, Ian R.; Porter, Claire; Morin, Paul

2016-06-01

We adapted the automated, open source NASA Ames Stereo Pipeline (ASP) to generate digital elevation models (DEMs) and orthoimages from very-high-resolution (VHR) commercial imagery of the Earth. These modifications include support for rigorous and rational polynomial coefficient (RPC) sensor models, sensor geometry correction, bundle adjustment, point cloud co-registration, and significant improvements to the ASP code base. We outline a processing workflow for ˜0.5 m ground sample distance (GSD) DigitalGlobe WorldView-1 and WorldView-2 along-track stereo image data, with an overview of ASP capabilities, an evaluation of ASP correlator options, benchmark test results, and two case studies of DEM accuracy. Output DEM products are posted at ˜2 m with direct geolocation accuracy of process individual stereo pairs on a local workstation, the methods presented here were developed for large-scale batch processing in a high-performance computing environment. We are leveraging these resources to produce dense time series and regional mosaics for the Earth's polar regions.

Lehre - Lab - Research. Eine Mediathek im Spannungsfeld zwischen Lehre und Forschung

Directory of Open Access Journals (Sweden)

Tabea Lurk

2017-12-01

Full Text Available Der Beitrag stellt den Laborcharakter der Mediathek der Hochschule für Gestaltung und Kunst FHNW Basel (HGK vor und verdeutlicht anhand vom „integrierten Katalog“, wie der Einfluss der fortschreitenden Digitalisierung, die spezifischen lokalen und institutionellen Rahmenbedingungen sowie die wissenschaftspolitischen Anforderungen der künstlerischen und der Designforschung zur Profilbildung der Mediathek beitragen. Eine effiziente Kleinststruktur intern und eine grosse Offenheit für externe Anregungen und Kooperationen ermöglichen jene flexiblen und experimentellen Strukturen, die neben dem Normalbetrieb als Verbunds- und Fernleihbibliothek den spezifischen Charakter der Mediathek auszeichnen. The text presents the laboratory character of the Mediathek of the Academy of Design and Art FHNW Basel (HGK and shows on the basis of the “integrated catalogue” how the ongoing digitization, the specific local and institutional framework and the academic policies, including artistic and design research, influence the profile of the Mediathek. An efficient internal microstructure and a great openness for external stimuli and collaborations enable flexible and experimental structures, which, in addition to the daily business as NEBIS Network library, characterize the typical nature of the Mediathek.

Dewatering of sludge using the hydrosoft high-pressure process; Entwaessern von Schlaemmen mit dem Hydrosoft-Hochdruckverfahren

Energy Technology Data Exchange (ETDEWEB)

Eder, C.; Eder, G. [Christian Eder Technology GbR, Neunkirchen (Germany)

1999-07-01

The hydrosoft process permits to dewater sludge, especially also sludge from municipal sewage treatment plant, until it contains a high proportion of dry substance. For existing dewatering systems equipped with the long-lived chamber filter presses, too, the dry matter content of the filter cake can be substantially increased using the hydrosoft process; only the pump system must be retrofitted. As a preliminary measure, tests with mobile pilot plants should be carried out. (orig.) [German] Mit dem Hydrosoft-Verfahren besteht die Moeglichkeit Schlaemme, insbesondere auch Schlaemme aus kommunalen Klaeranlagen, auf hohe Trockensubstanz-Gehalte zu entwaessern. Auch bei bestehenden Entwaesserungsanlagen, die mit den langlebigen Kammerfilterpressen ausgeruestet sind, koennen die Trockensubstanzgehalte der Filterkuchen mit dem Hydrosoft-Verfahren, fuer das dann nur noch das Pumpsystem nachgeruestet werden muss, wesentlich angehoben werden. Vorausgehen sollten jeweils Vorversuche mit mobilen Versuchsanlagen. (orig.)

Optimization of Particle Search Algorithm for CFD-DEM Simulations

Directory of Open Access Journals (Sweden)

G. Baryshev

2013-09-01

Full Text Available Discrete element method has numerous applications in particle physics. However, simulating particles as discrete entities can become costly for large systems. In time-driven DEM simulation most computation time is taken by contact search stage. We propose an efficient collision detection method which is based on sorting particles by their coordinates. Using multiple sorting criteria allows minimizing number of potential neighbours and defines fitness of this approach for simulation of massive systems in 3D. This method is compared to a common approach that consists of placing particles onto a grid of cells. Advantage of the new approach is independence of simulation parameters upon particle radius and domain size.

An algorithm for generation of DEMs from contour lines considering geomorphic features

Directory of Open Access Journals (Sweden)

Xiao-Ping Rui

2016-04-01

Full Text Available Geomorphic information is omitted from many existing methods of generating gridded digital elevation models (DEMs from contour lines, resulting in significant errors during interpolation. Here, we present an advanced schema for improvement of the comprehensive regionalized method of linear interpolation. This approach uses a moving fitting method for an interpolated point and selects elevation points that are representative of geomorphic features as a whole to improve interpolation quality. A total of 16 points are selected, according to certain criteria, in eight directions surrounding the interpolated point; thus, there are two points in each direction, which is sufficient to provide an accurate representation of the geomorphic features of the DEM. Our method introduces virtual control points to prevent sudden changes in the interpolation results, which helps to overcome problems related to the distortion of the local geospatial distribution in areas where feature geomorphic information is inadequate. We construct the spline interpolation function using intersection points and virtual control points, all of which are applied to compute the point elevation. Moreover, we index all elevation values and spatial points of linear features using the R-tree method to ensure that points related to an interpolated position can be retrieved as quickly as possible. Finally, we test our method using a coal mine elevation dataset. The results confirm that our proposed method can generate DEMs smoothly and, in particular, avoid problems related to local distortion.    Resumen La información geomórfica se omite en muchos de los métodos de generación de Modelos Digitales de Elevación (DEM, en inglés que se elaboran a partir de líneas de contorno, lo que resulta en errores significativos durante la interpolación. En este trabajo se presenta un esquema avanzado para el mejoramiento del método comprensivo regionalizado de interpolación lineal. Esta

Numerical probabilistic analysis for slope stability in fractured rock masses using DFN-DEM approach

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Alireza Baghbanan

2017-06-01

Full Text Available Due to existence of uncertainties in input geometrical properties of fractures, there is not any unique solution for assessing the stability of slopes in jointed rock masses. Therefore, the necessity of applying probabilistic analysis in these cases is inevitable. In this study a probabilistic analysis procedure together with relevant algorithms are developed using Discrete Fracture Network-Distinct Element Method (DFN-DEM approach. In the right abutment of Karun 4 dam and downstream of the dam body, five joint sets and one major joint have been identified. According to the geometrical properties of fractures in Karun river valley, instability situations are probable in this abutment. In order to evaluate the stability of the rock slope, different combinations of joint set geometrical parameters are selected, and a series of numerical DEM simulations are performed on generated and validated DFN models in DFN-DEM approach to measure minimum required support patterns in dry and saturated conditions. Results indicate that the distribution of required bolt length is well fitted with a lognormal distribution in both circumstances. In dry conditions, the calculated mean value is 1125.3 m, and more than 80 percent of models need only 1614.99 m of bolts which is a bolt pattern with 2 m spacing and 12 m length. However, as for the slopes with saturated condition, the calculated mean value is 1821.8 m, and more than 80 percent of models need only 2653.49 m of bolts which is equivalent to a bolt pattern with 15 m length and 1.5 m spacing. Comparison between obtained results with numerical and empirical method show that investigation of a slope stability with different DFN realizations which conducted in different block patterns is more efficient than the empirical methods.

The Influence of DEM Quality on Mapping Accuracy of Coniferous- and Deciduous-Dominated Forest Using TerraSAR‑X Images

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Gerald Kändler

2012-03-01

Full Text Available Climate change is a factor that largely contributes to the increase of forest areas affected by natural damages. Therefore, the development of methodologies for forest monitoring and rapid assessment of affected areas is required. Space-borne synthetic aperture radar (SAR imagery with high resolution is now available for large-scale forest mapping and forest monitoring applications. However, a correct interpretation of SAR images requires an adequate preprocessing of the data consisting of orthorectification and radiometric calibration. The resolution and quality of the digital elevation model (DEM used as reference is crucial for this purpose. Therefore, the primary aim of this study was to analyze the influence of the DEM quality used in the preprocessing of the SAR data on the mapping accuracy of forest types. In order to examine TerraSAR-X images to map forest dominated by deciduous and coniferous trees, High Resolution SpotLight images were acquired for two study sites in southern Germany. The SAR images were preprocessed with a Shuttle Radar Topography Mission (SRTM DEM (resolution approximately 90 m, an airborne laser scanning (ALS digital terrain model (DTM (5 m resolution, and an ALS digital surface model (DSM (5 m resolution. The orthorectification of the SAR images using high resolution ALS DEMs was found to be important for the reduction of errors in pixel location and to increase the classification accuracy of forest types. SAR images preprocessed with ALS DTMs resulted in the highest classification accuracies, with kappa coefficients of 0.49 and 0.41, respectively. SAR images preprocessed with ALS DTMs resulted in greater accuracy than those preprocessed with ALS DSMs in most cases. The classification accuracy of forest types using SAR images preprocessed with the SRTM DEM was fair, with kappa coefficients of 0.23 and 0.32, respectively.Analysis of the radar backscatter indicated that sample plots dominated by coniferous trees

3D-Druck von Metallen als Substitution und Wettbewerb von Gussteilen?: Vortrag gehalten auf dem 26. Ledebur-Kolloquium, 27. und 28. Oktober 2016, Freiberg

OpenAIRE

Müller, Bernhard

2016-01-01

Das Fraunhofer-Institut für Werkzeugmaschinen und Umformtechnik IWU ist kompetenter Partner für anwendungsorientierte Forschung im Automobil- und Maschinenbau an den Standorten Chemnitz, Dresden, Zittau unter dem Leitthema „Ressourceneffiziente Produktion“. Die Kernkompetenzen des Instituts in der Werkzeugmaschinenentwicklung, der Umform- und Zerspanungstechnik, der Mechatronik, dem Funktionsleichtbau sowie der Systemtechnologie werden durch den Einsatz generativer Fertigungs-verfahren ergänz...

Experimental study and DEM simulation of granular flow through a new sphere discharge valve

International Nuclear Information System (INIS)

Zhang He; Li Tianjin; Huang Zhiyong; Gao Zhi; Qi Weiwei; Bo Hanliang

2015-01-01

Experiments and DEM simulation have been conducted to investigate the granular flow through a new type of sphere discharge valve. The new sphere discharge valve was based on the principle of angle of repose. The glass sphere was used in the granular discharge experiments. Experimental results showed that the relation between the averaging sphere discharge mass flow rate and the stroke of the sphere discharge valve were consisted of three zones, i.e. the idle stroke zone, linearly zone and orifice restriction zone. The Beverloo's law was suitable for the granular flow through multi-orifices in the orifice restriction zone. The variation of averaging sphere discharge mass flow rate with the stroke of the sphere discharge valve was described by Beverloo's law with the modification based on the stroke of the sphere discharge valve. DEM simulation results showed that the drained angle of repose during granular flow in the sphere storage vessel remained 23 degrees with different stroke of the sphere discharge valve. (authors)

Mapping boreal forest biomass from a SRTM and TanDEM-X based on canopy height model and Landsat spectral indices

Science.gov (United States)

Sadeghi, Yaser; St-Onge, Benoît; Leblon, Brigitte; Prieur, Jean-François; Simard, Marc

2018-06-01

We propose a method for mapping above-ground biomass (AGB) (Mg ha-1) in boreal forests based predominantly on Landsat 8 images and on canopy height models (CHM) generated using interferometric synthetic aperture radar (InSAR) from the Shuttle Radar Topographic Mission (SRTM) and the TanDEM-X mission. The original SRTM digital elevation model (DEM) was corrected by modelling the respective effects of landform and land cover on its errors and then subtracted from a TanDEM-X DSM to produce a SAR CHM. Among all the landform factors, the terrain curvature had the largest effect on SRTM elevation errors, with a r2 of 0.29. The NDSI was the best predictor of the residual SRTM land cover error, with a r2 of 0.30. The final SAR CHM had a RMSE of 2.45 m, with a bias of 0.07 m, compared to a lidar-based CHM. An AGB prediction model was developed based on a combination of the SAR CHM, TanDEM-X coherence, Landsat 8 NDVI, and other vegetation indices of RVI, DVI, GRVI, EVI, LAI, GNDVI, SAVI, GVI, Brightness, Greenness, and Wetness. The best results were obtained using a Random forest regression algorithm, at the stand level, yielding a RMSE of 26 Mg ha-1 (34% of average biomass), with a r2 of 0.62. This method has the potential of creating spatially continuous biomass maps over entire biomes using only spaceborne sensors and requiring only low-intensity calibration.

CFD-DEM Simulation of Minimum Fluidisation Velocity in Two Phase Medium

Directory of Open Access Journals (Sweden)

H Khawaja

2016-09-01

Full Text Available In this work, CFD-DEM (computational fluid dynamics - discrete element method has been used to model the 2 phase flow composed of solid particle and gas in the fluidised bed. This technique uses the Eulerian and the Langrangian methods to solve fluid and particles respectively. Each particle is treated as a discrete entity whose motion is governed by Newton's laws of motion. The particle-particle and particle-wall interaction is modelled using the classical contact mechanics. The particles motion is coupled with the volume averaged equations of the fluid dynamics using drag law. In fluidised bed, particles start experiencing drag once the fluid is passing through. The solid particles response to it once drag experienced is just equal to the weight of the particles. At this moment pressure drop across the bed is just equal to the weight of particles divide by the cross-section area. This is the first regime of fluidization, also referred as ‘the regime of minimum fluidization’. In this study, phenomenon of minimum fluidization is studied using CFD-DEM simulation with 4 different sizes of particles 0.15 mm, 0.3 mm, 0.6 mm, and 1.2 mm diameters. The results are presented in the form of pressure drop across the bed with the fluid superficial velocity. The achieved results are found in good agreement with the experimental and theoretical data available in literature.

Theory and numeric modelling of non-isothermal multiphase processes in NAPL-contaminated porous media; Theorie und numerische Modellierung nichtisothermer Mehrphasenprozesse in NAPL-kontaminierten poroesen Medien

Energy Technology Data Exchange (ETDEWEB)

Class, H.

2000-07-01

The author investigates the numeric simulation of physical processes in porous media. The development of the model and its components is described, and the model is validated by laboratory experiments. Differences from the discretization methods BOX and CVFE are discussed as well as the applicability of the multigrid method described for multicomponent approaches. [German] Bei der thermischen Sanierung NAPL-kontaminierter Standorte, z.B. durch Injektion von Wasserdampf und/oder Heissluft, treten nichtisotherme Mehrphasenprozesse auf, die in einem Modell durch eine Betrachtung der Stroemungs- und Transportprozesse als Mehrkomponentensystem beschrieben werden koennen. Dabei ist der Austausch thermischer Energie zwischen den Phasen untereinander und auch dem poroesen Medium selbst, wie auch der Uebergang von Massekomponenten zwischen den Phasen zu beruecksichtigen. Die vorliegende Arbeit behandelt die numerische Simulation derartiger physikalischer Vorgaenge in poroesen Medien. Ausgehend von der Problemstellung wird die Entwicklung eines konzeptionellen Modells (Kap. 2) sowie die Umsetzung der daraus resultierenden mathematischen Gleichungen und dazu erforderlichen Diskretisierungs- und Loesungsmethoden in numerische Algorithmen dargestellt (Kap. 3). Anschliessend wird in Kap. 4 die Faehigkeit des erstelten numerischen Modells ueberprueft, Problemstellungen in natuerlichen Systemen zu simulieren (Vergleich mit Laborexperimenten); ausserdem werden Unterschiede der Diskretisierungsverfahren BOX und CVFE sowie die Anwendbarkeit des in dieser Arbeit fuer Mehrkomponentenformulierungen erweiterten Mehrgitterverfahrens diskutiert. (orig.)

Darmstadt colloquium on hydrological engineering 1999: flow and dispersion processes in aquatic interstitials; Darmstaedter Wasserbauliches Kolloquium 1999: Fliess- und Ausbreitungsvorgaenge in aquatischen Grenzraeumen

Energy Technology Data Exchange (ETDEWEB)

NONE

2000-07-01

Anthropogenic effects have changed the patterns and intensities of pollutant transport into soil, groundwater and surface water, and water management has become a metter of great importance in the field of tension between water use and sustainability. Especially aquatic interstitials have great influence on environmental transport. The Darmstaedter Wasserbauliches Kolloquium (DAWAKO) 1999, which was held by the Institute of Hydrological Engineering and Water Management of TU Darmstadt University, discussed recent developments in the interstitials between unsaturated soil and groundwater, groundwater and flowing water, flowing water and floor. [German] Als Folge anthropogener Eingriffe in den Wasserkreislauf, z.B. infolge Landnutzungsaenderungen, Gewaesserausbau, Sieldungstaetigkeit usw. haben sich die Art und die Intensitaet des Stoffeintrages in Boden, Grundwasser sowie in die Oberflaechengewaesser erheblich gewandelt. Entsprechend sind zahlreiche wasserwirtschaftliche Fragestellungen im Spannungsfeld zwischen steigenden Anspruechen bei der Wassernutzung und dem Gebot einer nachhaltigen Bewirtschaftung dieser begrenzten Ressource zu behandeln. Es ist bekannt, dass aufgrund der periodisch wechselnden Milieubedingungen gerade den aquatischen Grenzraeumen eine besondere Bedeutung fuer den Stoffhaushalt zukommt. Neuere Entwicklungen bei den Prozessuntersuchungen in den Grenzraeumen zwischen: - ungesaettigter Bodenzone und Grundwasser - Grundwasser und Fliessgewaesser - Fliessgewaesser und Sohle (Interstitial) standen im Mittelpunkt des diesjaehrigen Darmstaedter Wasserbaulichen Kolloquiums (DAWAKO), das am 14. und 15. Oktober 1999 vom Institut fuer Wasserbau und Wasserwirtschaft der TU Darmstadt veranstaltet wurde. (orig.)

Suitability of tracers; Eignung von Tracern

Energy Technology Data Exchange (ETDEWEB)

Klotz, D. [GSF - Forschungszentrum fuer Umwelt und Gesundheit GmbH, Neuherberg (Germany). Inst. fuer Hydrologie

1999-02-01

Hydrological tracer techniques are a means of making statements on the direction and speed of underground water. One of the simpler tasks is to find out whether there is hydrological communication between two given points. This requires a determination of the direction of flow, which places less exacting demands on the properties of the tracer than does the task of determining the flow velocity of underground water. Tracer methods can serve to infer from flow velocity the distance (flow) velocity, which is defined as the ratio between the distance between two points located in flow direction and the actual time it takes water to flow from one to the other. [Deutsch] Mit Hilfe der hydrologischen Markierungstechniken koennen Aussagen ueber die Richtung und die Geschwindigkeit von Bewegungen des unterirdischen Wassers gemacht werden. Der einfachere Fall liegt vor, wenn festgestellt werden soll, ob zwischen zwei Punkten eine hydrologische Verbindung besteht. Bei dieser Fliessrichtungsbestimmung sind die Forderungen an die Eigenschaften der einzusetzenden Tracer geringer als bei der Bestimmung der Geschwindigkeit des unterirdischen Wassers. Von den Geschwindigkeiten des unterirdischen Wassers ist die Abstands-(Fliess)geschwindigkeit, die definiert ist durch das Verhaeltnis aus dem Abstand und der wahren Fliesszeit zwischen zwei in Bewegungsrichtung gelegenen Punkten, durch Tracermethoden zu bestimmen. (orig.)

Die Geburt des Kosmos aus dem Nichts die Theorie des inflationären Universums

CERN Document Server

Guth, Alan

2002-01-01

Selten wird die Wissenschaft über Nacht so stark revolutioniert wie die Kosmologie durch Alan Guths Entdeckung der inflationären Theorie des Universums. Noch seltener gelingt es dem Urheber einer solchen Revolution, eine derart verständliche und einprägsame Darstellung von einer der aufregendsten Epochen in der modernen Kosmologie zu geben. Sogar Kenner werden Neues lernen.

Is it possible to prevent dementia? É possível prevenir o desenvolvimento da demência?

Directory of Open Access Journals (Sweden)

Nicola T Lautenschlager

2002-04-01

Full Text Available It is a robust trend that the World's population is growing older. The proportion of elderly compared to other age groups and especially the number of oldest old, above age 85 years, is steadily increasing. One of the most common disorders in later life is dementia, the major cause of functional disability and the need for long-term care. This has prompted intensive research towards identifying risk factors associated with dementia. For current therapeutic intervention of incipient dementia and future prevention trials it is important to identify subjects at high risk of developing dementia. This article reviews clinical and biological findings of the quest to identify pre-dementia in subjects with mild cognitive impairment. It gives an overview of the present knowledge in this area and discusses strategies that may be useful in delaying the onset of dementia.A população mundial está envelhecendo. A proporção de idosos cresce de forma constante quando comparada a outras faixas etárias, particularmente para o grupo com 85 ou mais anos de idade. Um dos problemas de saúde mais freqüentes em fases tardias da vida é a demência, uma das principais causas de perda da capacidade funcional em idosos que, com freqüência, requer assistência com cuidados básicos em longo prazo. Como conseqüência, várias pesquisas têm procurado estabelecer os fatores que aumentam o risco de demência. Do ponto de vista terapêutico, é importante ser capaz de identificar de forma confiável indivíduos com alto risco de desenvolver demência, já que esses pacientes seriam o principal alvo de intervenções clínicas desenhadas com o objetivo de preveni-la. Este artigo tem o objetivo de rever os principais achados clínicos e biológicos das pesquisas que tiveram como objetivo identificar "pré-demência" em pessoas com "comprometimento cognitivo leve". O artigo oferece uma visão panorâmica do conhecimento atual nessa área e discute estratégias que

O efeito de um programa psicomotor para idosos com demência

OpenAIRE

Henriques, Bebiana Maria Pais

2013-01-01

Trabalho de Projeto apresentado à Universidade Fernando Pessoa como parte dos requisitos para obtenção do grau de Mestre em Fisioterapia, ramo de Fisioterapia da Senescência Resultados de vários estudos fornecem informações relevantes à literatura do envelhecimento, sugerindo que há uma relação positiva entre a intervenção motora e cognitiva em idosos com demência (p. ex. Ferrer et al., 2003). Segundo a Alzheimer Europe (2012) existem 7,3 milhões de europeus dementes (153.000 port...

Salud ambiental: conceptos y actividades

Directory of Open Access Journals (Sweden)

Gonzalo A. Ordóñez

2000-03-01

Full Text Available La finalidad del trabajo es aportar información y propuestas conceptuales que faciliten la tarea de quienes tienen a su cargo la sistematización institucional de la salud ambiental. Se hace un análisis de la noción de "ambiente" para la cual se sugiere una definición, y se examina el lugar de la salud ambiental en el contexto de los problemas ambientales y sus vertientes "verde" y "azul". Se examinan denominaciones equivalentes de salud ambiental y se introducen los servicios de salud ambiental. Se proporcionan varias definiciones y se da la oficial de salud ambiental adoptada por la OMS en Sofía, Bulgaria (1993. A continuación se transcriben las áreas básicas que a la salud ambiental le han asignado diversas organizaciones o reuniones, como la OPS, la OMS, el Programa 21 y otros. A partir de aquí se construye un repertorio bastante completo de áreas y subáreas y se encuentra que todos los listados son, en realidad, una reunión asistemática de tres tipos de constituyentes: determinantes (factores o hechos de la realidad física, procesos (conjuntos de intervenciones y funciones (conjuntos de acciones de gestión, los cuales pueden enfocarse matricialmente y llevan a individualizar actividades de los servicios de salud ambiental. Se proponen unas reglas de operación que permiten, en una especie de álgebra, construir expresiones para especificar con precisión las actividades y sus agregados. De este modo se logra disponer de un lenguaje simbólico común que puede ayudar a la intercomunicación, enseñanza e investigación en el ámbito de la salud ambiental.

Briefe aus dem Morgenland - Otto Friedrich von Richters Forschungsreise in den Jahren 1814-1816 / Vladimir Sazonov

Index Scriptorium Estoniae

Sazonov, Vladimir, 1979-

2013-01-01

Arvustus: Briefe aus dem Morgenland - Otto Friedrich von Richters Forschungsreise in den Jahren 1814-1816, hrsg. von Indrek Jürjo, Sergei Stadnikov, Hamburger Beiträge zur Geschichte des östlichen Europa, Bd. 20. Hamburg: Verlag Dr. Kovač 2013, 313 lk.

MODIFICANDO O AMBIENTE ESCOLAR ATRAVÉS DO PROJETO MEIO AMBIENTE: CULTIVANDO E CONHECENDO AS PLANTAS

Directory of Open Access Journals (Sweden)

Letícia Caroline Lopes

2011-07-01

Full Text Available O presente trabalho intitulado “MODIFICANDO O AMBIENTE ESCOLAR ATRAVÉS DO PROJETO MEIO AMBIENTE: CULTIVANDO E CONHECENDO AS PLANTAS” tem como desígnio apresentar o desenvolvimento do projeto “meio ambiente: cultivando e conhecendo as plantas”, no qual teve como proposta sensibilizar os alunos sobre a importância e preservação do meio ambiente através da prática e modificação do ambiente escolar, onde procurou-se utilizar materiais reciclados, tais como, garrafas pet, pneus velhos, carreteis de fios de eletricidade, e também mudas de arvore, plantas e hortaliças. Desta forma buscou se utilizar da criatividade dos envolvidos no processo para a transformação do ambiente escolar seco e vazio, para uma ambiente alegre, e acolhedor. O projeto foi elaborado pelas professoras da Extensão Betel, e aplicado em parceria com acadêmicos do sexto semestre do curso de Licenciatura em Pedagogia da Universidade do Estado do Mato Grosso (UNEMAT, campus de Sinop. Tendo como proposta a interdisciplinaridade, o projeto foi divido em três eixos orientados pelas professoras Edneuza Alves Trugillo, Sinóvia Rauber e Mariza Kreinner, abrangendo assim alunos e professoras de duas turmas de 2º Ano do Ensino Fundamental, e acadêmicos e professores da Universidade, os eixos foram arborização, jardinagem e horta, onde teve a duração de aproximadamente dois meses. A finalização das práticas obteve resultados satisfatórios e objetivos alcançados, tanto pela sensibilização dos alunos sobre a preservação e importância do meio-ambiente, quanto pela prática de intervenção pelos acadêmicos envolvidos no processo, que em coletividade conseguiram modificar o ambiente escolar através do objetivo do projeto, meio-ambiente, proporcionando assim um enriquecimento na formação acadêmica enquanto práticas pedagógicas.

Marginal flow in compressor cascades. Influence of gap, cascade geometry, loads and inflow boundary layer. Final report; Randstroemung in Verdichtergittern. Untersuchung der Randstroemung in Verdichtergittern unter dem Einfluss von Spalt, Gittergeometrie, Gitterbelastung und Zustroemgrenzschicht. Abschlussbericht

Energy Technology Data Exchange (ETDEWEB)

Huebner, J

1996-07-01

Experimental and theoretical investigations were made in order to define the main influencing parameters of gap flow and secondary flow in compressor cascades. The investigations and results are presented in detail. [German] Im Rahmen des FVV-Forschungsvorhabens 'Randstroemung in Verdichtergittern' wurden am Institut fuer Strahlantriebe der Universitaet der Bundeswehr Muenchen umfangreiche experimentelle und theoretische Untersuchungen zur Bestimmung der wesentlichen Einflussgroessen auf die Spalt- und Sekundaerstroemung in Verdichtergittern durchgefuehrt. Als Parameter wurden die Spaltweite, das Schaufelseitenverhaeltnis mit Schaufelhoehe und Sehnenlaenge, die aerodynamische Belastung und die Zustroemgrenzschichtdicke variiert. Zur Analyse der Stroemungsvorgaenge wurden Fuenflochsonden-Stroemungsfeldtraversierungen, Profil- und Seitenwanddruckverteilungsmessungen und Laser-Zwei-Fokus-Messungen im Spalt herangezogen. Die experimentellen Untersuchungen zeigen eine komplexe Wechselwirkung zwischen Spalt- und Kanalwirbel. Die Spalt- und Sekundaerverluste steigen mit der Spaltweite und der aerodynamischen Belastung, wobei der Anstieg eine welchselseitige Abhaengigkeit der Parameter aufweist. Gegenueber dem Schaufelseitenverhaeltnis verhalten sich die Spalt- und Sekundaerverluste umgekehrt proportional. Die Zustroemgrenzschicht beeinflusst zwar den Verlust- und Abstroemwinkelverlauf ueber der Schaufelhoehe, jedoch nicht die sich abzueglich des Profil- und Zustroemverlustes ergebenden Spalt- und Sekundaerverluste. Die verwendeten 3D Stroemungsberechnungsverfahren erfassen die Stroemungsphaenomene qualitativ gut, wobei der Spaltmodellierung eine besondere Rolle zukommt. Die realistische Spaltmodellierung erlaubt einen sehr detaillierten Einblick in das Stroemungsgeschehen im Spalt. Die Verlustberechnung erweist sich jedoch als sehr unsicher. Auf der Grundlage einer umfangreichen Literaturanalyse wurden die verfuegbaren Korrelationen zur Berechnung des Spaltverlustes und

ASPECTS OF DEM GENERATION FROM UAS IMAGERY

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A. Greiwe

2013-08-01

Full Text Available Since a few years, micro UAS (unmanned aerial systems with vertical take off and landing capabilities like quadro- or octocopter are used as sensor platform for Aerophotogrammetry. Since the restricted payload of micro UAS with a total weight up of 5 kg (payload only up to 1.5 kg, these systems are often equipped with small format cameras. These cameras can be classified as amateur cameras and it is often the case, that these systems do not meet the requirements of a geometric stable camera for photogrammetric measurement purposes. However, once equipped with a suitable camera system, an UAS is an interesting alternative to expensive manned flights for small areas. The operating flight height of the above described UAS is about 50 up to 150 meters above ground level. This low flight height lead on the one hand to a very high spatial resolution of the aerial imagery. Depending on the cameras focal length and the sensor's pixel size, the ground sampling distance (GSD is usually about 1 up to 5 cm. This high resolution is useful especially for the automatic generation of homologous tie-points, which are a precondition for the image alignment (bundle block adjustment. On the other hand, the image scale depends on the object's height and the UAV operating height. Objects like mine heaps or construction sites show high variations of the object's height. As a result, operating the UAS with a constant flying height will lead to high variations in the image scale. For some processing approaches this will lead to problems e.g. the automatic tie-point generation in stereo image pairs. As precondition to all DEM generating approaches, first of all a geometric stable camera, sharp images are essentially. Well known calibration parameters are necessary for the bundle adjustment, to control the exterior orientations. It can be shown, that a simultaneous on site camera calibration may lead to misaligned aerial images. Also, the success rate of an automatic tie

Educação ambiental na escola: a perspectiva estudantil sobre o meio ambiente e a propaganda ambiental na internet

Directory of Open Access Journals (Sweden)

Fernanda Reis de Pinho Tavares

2005-01-01

Full Text Available Este trabalho visa mostrar as idéias dos estudantes sobre um tema - a propaganda - refletindo como ela se insere na questão ambiental. Também abordamos como os alunos percebem questões como as relações, empresa, meio ambiente e sociedade. Foi realizado em uma oficina de Educação Ambiental, em uma escola particular de Lagoa Santa - MG, durante os meses de junho e julho de 2004. Analisaram-se sites de diversas empresas e ONG's (Organizações Não Governamentais. Em sua maioria os estudantes conseguiram posicionar-se criticamente em relação às entidades investigadas.

Radiation-induced muscositis and neutrophil granulocytes in oral mucosa; Strahleninduzierte Mukositis und neutrophile Granulozyten in der Mundschleimhaut

Energy Technology Data Exchange (ETDEWEB)

Schmidberger, H.; Rave-Fraenk, M.; Kim, S.; Hille, A.; Pradier, O.; Hess, C.F. [Klinik fuer Strahlentherapie und Radioonkologie, Univ. Goettingen (Germany)

2003-10-01

Granulozyten in der Mundspuelfluessigkeit im Verlauf einer Radiotherapie oder einer Radio-chemotherapie (5-FU, Mitomycin) untersucht. Als Referenz wurden an vier freiwilligen, gesunden Probanden gleichartige Untersuchungen vorgenommen. Die Patienten/Probanden spuelten den Rachenraum 30 s mit 15 ml steriler physiologischer NaCl-Loesung. Das Sputum wurde zentrifugiert, mit 2 {mu}g/ml Akridin-Orange in 1 ml RPMI resuspendiert und anschliessend 15 min bei 37 C inkubiert. Die Zahl der neutrophilen Granulozyten in der Suspension wurde in einer Zaehlkammer unter dem Fluoreszenzmikroskop ausgewertet. Ergebnisse: Bei den Patienten wurden starke intra- und interindividuelle Schwankungen der enoralen neutrophilen Granulozytenanzahl in der Mundspuelfluessigkeit beobachtet. Tendenziell liess sich ein Zusammenhang zwischen dem Ausmass der radiogenen Mukositis und der Anzahl der neutrophilen Granulozyten in der Mundspuelfluessigkeit feststellen. Mit zunehmender Mukositis nahm die Anzahl der neutrophilen Granulozyten zu. Die Zunahme wurde durch eine Chemotherapie eher verstaerkt, die Behandlungspausen am Wochenende zeigten keinen Einfluss auf die Granulozytenanzahl. Schlussfolgerungen: Zwischen dem Ausmass der Mukositis und der Anzahl der neutrophilen Granulozyten in der Mundspuelfluessigkeit wurde tendenziell ein Zusammenhang beobachtet. Die starken Schwankungen der Messwerte verhindern jedoch die Verwendung dieses Parameters als Surrogat, um die radiogene Mukositis zu quantifizieren. Die Vermutung, dass eine Verminderung der neutrophilen Granulozyten in der Mundschleimhaut fuer die Entstehung der radiogenen Mukositis von Bedeutung ist, konnte nicht bestaetigt werden. (orig.)

Gully incision rates on the bedrock of a large dip-slope landslide revealed by multi-period LiDAR DEMs

Science.gov (United States)

Chan, Y. C.; Hsieh, Y. C.

2017-12-01

Recent advances in airborne laser scanning (ALS) technology have provided a great opportunity for characterizing surface erosion through developing improved methods in multi-period DEM differencing and geomorphometry. This study uses three periods of ALS digital elevation model (DEM) data to analyze the short-term erosional features of the Tsaoling landslide triggered by the 1999 Chi-Chi earthquake in Taiwan. Two methods for calculating the bedrock incision rate, the equal-interval cross section selection method and the continuous swath profiles selection method, were used in the study after nearly ten years of gully incision following the earthquake-triggered dip-slope landslide. Multi-temporal gully incision rates were obtained using the continuous swath profiles selection method, which is considered a practical and convenient approach in terrain change studies. After error estimation and comparison of the multi-period ALS DEMs, the terrain change in different periods can be directly calculated, reducing time-consuming fieldwork such as installation of erosion pins and measurement of topographic cross sections on site. In this study, the gully bedrock incision rates ranged between 0.23 and 3.98 m/year, remarkably higher than the typical results from the previous studies. By comparing the DEM data, aerial photos, and precipitation records of this area, the effects of erosion could be observed from the retreat of the Chunqiu Cliff outline during August 2011 to September 2012. It was inferred that the change in the topographic elevation during 2011-2012 was mainly due to the torrential rain brought by Typhoon Soula, which occurred on 30 July 2012. The local gully incision rate in the lower part of the landslide surface was remarkably faster than that of the other regions, suggesting that the fast incision of the toe area possibly contributes to the occurrence of repeated landslides in the Tsaoling area.

Investigation of Drag Force on Fibres of Bonded Spherical Elements using a Coupled CFD-DEM Approach

DEFF Research Database (Denmark)

Jensen, Anna Lyhne; Sørensen, Henrik; Rosendahl, Lasse Aistrup

2016-01-01

Clogging in wastewater pumps is often caused by flexible, stringy objects. Therefore, simulation of clogging effects in wastewater pumps entails simulation of such flexible objects and the interaction between these objects and fluid in the pump. Using a coupled CFD-DEM approach, the flexible obje...

COMPLEJIDAD AMBIENTAL: PROPUESTAS ÉTICAS EMERGENTES DEL PENSAMIENTO AMBIENTAL LATINOAMERICANO

Directory of Open Access Journals (Sweden)

Noguera de Echeverri Ana Patricia

2008-07-01

Full Text Available En este artículo, se recogen las propuestas ético ambientales más importantes de la Escuela de Pensamiento Ambiental Latinoamericano, que ha ido construyéndose desde hace 30 años. Se destacan autores de primera línea en el campo de la construcción de Pensamiento Ambiental filosófico, como el Filósofo y Pensador Colombiano, de trascendencia latinoamericana, Augusto Ángel Maya, quien plantea la posibilidad de construir una Filosofía Ambiental Ético estética, dado que la Filosofía Moderna ha sido Metafísica, aún en sus corrientes empiristas, positivistas y neopositivistas. Se destaca la obra de Enrique Leff, mexicano, que propone los conceptos de Complejidad y Saber Ambiental, como puntos de partida de una ética en la educación, la ciencia y la tecnología, dentro de unas relaciones sistémicas y holísticas. Igualmente la propuesta ético estética compleja de Julio Carrizoza, colombiano, se hace presente en este ensayo, como una propuesta política fundamental ante problemas colombianos como son la violencia y la exclusión. Las propuestas de Filósofos colombianos de gran importancia en el campo de la Filosofía Política y Moral, que han desembocado en la propuesta de una Ética Ambiental, Pública y Comunicativa, como es el caso de Guillermo Hoyos Vásquez y de otros pensadores tanto de Colombia como de otros países latinoamericanos, se presentan en este espacio, con el fin de recoger de manera crítica nuestras ideas acerca de la posibilidad de una ética ambiental, es decir una ética descentrada, sin sujeto y sin objeto, una ética sistémica, donde los valores se construyen en las relaciones y donde la intricada trama de la vida, que ha venido construyéndose desde hace más de 2.500 millones de años, y de la cual somos meros hilos, pasa de ser objeto a ser valor primero en su más genuino sentido.

Det ambientes fænomenologi

DEFF Research Database (Denmark)

Walther-Hansen, Mads

2014-01-01

Det ambiente: sansning, medialisering, omgivelse er et aktuelt og ambitiøst værk. Bogen skildrer hvordan ambiente fænomener har fået en stigende betydning i den moderne verden, og redegør for måden hvorpå det ambiente virker ind på hele vores oplevelseskultur. Det er en levende, uprætentiøs og frem...

Persuasion in Ambient Intelligence

NARCIS (Netherlands)

Kaptein, M.C.; Markopoulos, P.; Ruyter, de B.E.R.; Aarts, E.H.L.

2010-01-01

Although the field of persuasive technologies has lately attracted a lot of attention, only recently the notion of ambient persuasive technologies was introduced. Ambient persuasive technologies can be integrated into every aspect of life, and as such have greater persuasive power than the

An Automated Processing Algorithm for Flat Areas Resulting from DEM Filling and Interpolation

Directory of Open Access Journals (Sweden)

Xingwei Liu

2017-11-01

Full Text Available Correction of digital elevation models (DEMs for flat areas is a critical process for hydrological analyses and modeling, such as the determination of flow directions and accumulations, and the delineation of drainage networks and sub-basins. In this study, a new algorithm is proposed for flat correction/removal. It uses the puddle delineation (PD program to identify depressions (including their centers and overflow/spilling thresholds, compute topographic characteristics, and further fill the depressions. Three different levels of elevation increments are used for flat correction. The first and second level of increments create flows toward the thresholds and centers of the filled depressions or flats, while the third level of small random increments is introduced to cope with multiple threshold conditions. A set of artificial surfaces and two real-world landscapes were selected to test the new algorithm. The results showed that the proposed method was not limited by the shapes, the number of thresholds, and the surrounding topographic conditions of flat areas. Compared with the traditional methods, the new algorithm simplified the flat correction procedure and reduced the final elevation increments by 5.71–33.33%. This can be used to effectively remove/correct topographic flats and create flat-free DEMs.

CFD-DEM Simulation of Propagation of Sound Waves in Fluid Particles Fluidised Medium

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H Khawaja

2016-09-01

Full Text Available In this work, speed of sound in 2 phase mixture has been explored using CFD-DEM (Computational Fluid Dynamcis - Discrete Element Modelling. In this method volume averaged Navier Stokes, continuity and energy equations are solved for fluid. Particles are simulated as individual entities; their behaviour is captured by Newton's laws of motion and classical contact mechanics. Particle-fluid interaction is captured using drag laws given in literature. The speed of sound in a medium depends on physical properties. It has been found experimentally that speed of sound drops significantly in 2 phase mixture of fluidised particles because of its increased density relative to gas while maintaining its compressibility. Due to the high rate of heat transfer within 2 phase medium as given in Roy et al. (1990, it has been assumed that the fluidised gas-particle medium is isothermal. The similar phenomenon has been tried to be captured using CFD-DEM numerical simulation. The disturbance is introduced and fundamental frequency in the medium is noted to measure the speed of sound for e.g. organ pipe. It has been found that speed of sound is in agreement with the relationship given in Roy et al. (1990. Their assumption that the system is isothermal also appears to be valid.

Landslide Detection in the Carlyon Beach, WA Peninsula: Analysis Of High Resolution DEMs

Science.gov (United States)

Fayne, J.; Tran, C.; Mora, O. E.

2017-12-01

Landslides are geological events caused by slope instability and degradation, leading to the sliding of large masses of rock and soil down a mountain or hillside. These events are influenced by topography, geology, weather and human activity, and can cause extensive damage to the environment and infrastructure, such as the destruction of transportation networks, homes, and businesses. It is therefore imperative to detect early-warning signs of landslide hazards as a means of mitigation and disaster prevention. Traditional landslide surveillance consists of field mapping, but the process is expensive and time consuming. This study uses Light Detection and Ranging (LiDAR) derived Digital Elevation Models (DEMs) and k-means clustering and Gaussian Mixture Model (GMM) to analyze surface roughness and extract spatial features and patterns of landslides and landslide-prone areas. The methodology based on several feature extractors employs an unsupervised classifier on the Carlyon Beach Peninsula in the state of Washington to attempt to identify slide potential terrain. When compared with the independently compiled landslide inventory map, the proposed algorithm correctly classifies up to 87% of the terrain. These results suggest that the proposed methods and LiDAR-derived DEMs can provide important surface information and be used as efficient tools for digital terrain analysis to create accurate landslide maps.

Extraprostatische Expansion des Prostatakarzinoms und seine Beziehung zu den Resektionsrändern bei der radikalen Prostatektomie aus Sicht des Pathologen

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Noll P

2008-01-01

Full Text Available Das Prostatakarzinom stellt heute in der westlichen Welt das am häufigsten diagnostizierte Karzinom beim Mann dar. Entsprechend dieser Häufigkeit werden zunehmend radikale Prostatektomien durchgeführt. Die histologische Aufarbeitung des Operationspräparates liefert dem Urologen die wichtigsten Prognosefaktoren des Prostatakarzinoms. Hierbei besteht ein enger Zusammenhang zwischen der extraprostatischen Ausdehnung des Tumors und seiner Beziehung zu den Resektionsrändern. Anhand einer eigenen Untersuchung an 200 radikal operierten Prostatakarzinomen konnte gezeigt werden, dass hierbei die Lokalisation, der Malignitätsgrad und die Größe des Tumors entscheidende Bedeutung haben. Die Ermittlung dieser Parameter ist abhängig von einer standardisierten Untersuchungstechnik auf der Grundlage einer vollständigen histologischen Aufarbeitung der Prostata.

Rezension von: Ulrike Klöppel: XX0XY ungelöst. Hermaphroditismus, Sex und Gender in der deutschen Medizin. Eine historische Studie zur Intersexualität. Bielefeld: transcript Verlag 2010.

Directory of Open Access Journals (Sweden)

Sarah Radtke

2010-10-01

Full Text Available Ulrike Klöppel führt in ihrer materialreichen Studie vor, dass Hermaphroditismus für die Medizin immer wieder Anlass war, sich mit der Vielfalt der das Geschlecht bestimmenden Faktoren – Gestalt und Form der Genitalien, Chromosomengeschlecht, Keimdrüsengeschlecht (Hoden vs. Eierstöcke, Hormonhaushalt, Geschlechtsrolle und Geschlechtsidentität – zu befassen und zu versuchen, Geschlechtszugehörigkeiten verbindlich festzulegen. Neben einem historischen Teil, der vor allem die Medizingeschichte der Frühen Neuzeit, der Aufklärungszeit und des 19. Jahrhunderts in den Blick nimmt, wird im zweiten Teil der Arbeit der Zusammenhang zwischen der Formierung des gender-Konzepts und dem damit verbundenen Paradigmenwechsel in der Behandlung von Intersexualität dargestellt.

Quantitative Analysis of Accuracy of Voidage Computations in CFD-DEM Simulations

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H. A. Khawaja

2012-06-01

Full Text Available CFD-DEM (Computational Fluid Dynamics – Discrete Element Modelling is a two-phase flow numerical modelling technique, where the Eulerian method is used for the fluid and the Lagrangian method for the particles. The two phases are coupled by a fluid-particle interaction force (i.e. drag force which is computed using a correlation. In a two-phase flow, one critical parameter is the voidage (or void fraction, which is defined as the ratio of the volume occupied by the fluid to the total volume. In a CFD-DEM simulation the local voidage is computed by calculating the volume of particles in a given fluid cell. For spherical particles, this computation is difficult when a particle is on the boundary of fluid cells. In this case, it is usual to compute the volume of a particle in a fluid cell approximately. One such approximation divides the volume of a particle into each cell in the same ratio as an equivalent cube of width equal to the particle diameter. Whilst this approach is computationally straight forward, the approximation introduces an error in the voidage computation. Here we estimate the error by comparing the approximate volume calculation with an exact (numerical computation of the volume of a particle in a fluid cell. The results show that the error varies with the position of the particle relative to the cell boundary. A new approach is suggested which limits the error to less than 2.5 %, without significantly increasing the computational complexity.

1963 Vajont rock slide: a comparison between 3D DEM and 3D FEM

Science.gov (United States)

Crosta, Giovanni; Utili, Stefano; Castellanza, Riccardo; Agliardi, Federico; Bistacchi, Andrea; Weng Boon, Chia

2013-04-01

Data on the exact location of the failure surface of the landslide have been used as the starting point for the modelling of the landslide. 3 dimensional numerical analyses were run employing both the discrete element method (DEM) and a Finite Element Method (FEM) code. In this work the focus is on the prediction of the movement of the landlside during its initial phase of detachment from Mount Toc. The results obtained by the two methods are compared and conjectures on the observed discrepancies of the predictions between the two methods are formulated. In the DEM simulations the internal interaction of the sliding blocks and the expansion of the debris is obtained as a result of the kinematic interaction among the rock blocks resulting from the jointing of the rock mass involved in the slide. In the FEM analyses, the c-phi reduction technique was employed along the predefine failure surface until the onset of the landslide occurred. In particular, two major blocks of the landslide were identified and the stress, strain and displacement fields at the interface between the two blocks were analysed in detail.

The recommendations of the Commission to review the financing of the nuclear power phase-out (KFK); Die Empfehlungen der Kommission zur Ueberpruefung der Finanzierung des Kernenergieausstiegs (KFK)

Energy Technology Data Exchange (ETDEWEB)

Ziehm, Cornelia

2016-07-15

Endlagerung der radioaktiven Abfaelle und die dafuer notwendigen Mittel dem Staat zur Sicherung uebertragen werden. Fuer die verbleibenden Aufgaben, also insbesondere der Stilllegung und des Rueckbaus der Atomkraftwerke und die Verpackung der radioaktiven Abfaelle zur Zwischenlagerung, sollen die Aufgaben und die Finanzsicherung bei den Unternehmen verbleiben. Fuer die Zwischen- und Endlagerung soll ein oeffentlich-rechtlicher Fonds eingerichtet werden. Gegen eine vollstaendige Einzahlung von insgesamt 23,3 Mrd. Euro sollen die Risiken fuer die Zwischen- und Endlagerung auf den Staat uebergehen. Mit der vollstaendigen Uebertragung der Mittel sowie der erfolgten Zahlung des vollen Risikozuschlags soll die Haftung der Betreiber fuer Zwischenlagerung und Endlagerung enden. Fuer Stilllegung und Rueckbau der Atomkraftwerke und die Verpackung der radioaktiven Abfaelle soll es danach weiterhin beim System der handelsrechtlichen Rueckstellungen bleiben. Im Hinblick auf Zwischen- und Endlagerung soll zwar eine Abkehr vom System der handelsrechtlichen Rueckstellungen erfolgen. Allerdings sollen die Betreiber enthaftet werden - zu einem Zeitpunkt, in dem die ueber Jahrzehnte und in Jahrzehnten anfallenden Kosten nur ansatzweise bezifferbar sind.

Algorithms in ambient intelligence

NARCIS (Netherlands)

Aarts, E.H.L.; Korst, J.H.M.; Verhaegh, W.F.J.; Weber, W.; Rabaey, J.M.; Aarts, E.

2005-01-01

We briefly review the concept of ambient intelligence and discuss its relation with the domain of intelligent algorithms. By means of four examples of ambient intelligent systems, we argue that new computing methods and quantification measures are needed to bridge the gap between the class of

Emission permits trading as a climate change policy mechanism - the difference between ideology and implementation; Der Emissionshandel als klimaschutzpolitisches Instrument zwischen Ideologie und praktischem Einsatz

Energy Technology Data Exchange (ETDEWEB)

Schafhausen, F. [Bundesministerium fuer Umwelt, Naturschutz und Reaktorsicherheit, Berlin (Germany)

2002-08-01

The article summarizes the conflicting opinions and political objectives of industrial associations, traders in the energy markets, and national and EU public authorities. Whilst many European industrial associations of the energy sector developed a positive position on the emission permits trading scheme, and eurelectric for instance refers to the economic advantages offered to the electric power industry, there are some lines of business and electric utilities in Germany who strictly refuse to deal with the issue. (orig./CB) [German] Der Artikel fasst Kritik und ablehnende wie positive Meinungen zu dem Thema ''Einfuehrung des Emissionshandels'' zusammen. Waehrend sich die europaeischen Wirtschaftsverbaende durchaus positiv mit dem Emissionshandel auseinandersetzen und z. B. eurelectric auf die wirtschftlichen Vorteile hinweist, blocken bestimmte Branchen und Unternehmen in Deutschland das Thema massiv ab. Die politischen Ziele und Umsetzungsstrategien werden ebenfalls dargestellt. (orig./CB)

Time-averaged discharge rate of subaerial lava at Kīlauea Volcano, Hawai‘i, measured from TanDEM-X interferometry: Implications for magma supply and storage during 2011-2013

Science.gov (United States)

Poland, Michael P.

2014-01-01

Differencing digital elevation models (DEMs) derived from TerraSAR add-on for Digital Elevation Measurements (TanDEM-X) synthetic aperture radar imagery provides a measurement of elevation change over time. On the East Rift Zone (EZR) of Kīlauea Volcano, Hawai‘i, the effusion of lava causes changes in topography. When these elevation changes are summed over the area of an active lava flow, it is possible to quantify the volume of lava emplaced at the surface during the time spanned by the TanDEM-X data—a parameter that can be difficult to measure across the entirety of an ~100 km2 lava flow field using ground-based techniques or optical remote sensing data. Based on the differences between multiple TanDEM-X-derived DEMs collected days to weeks apart, the mean dense-rock equivalent time-averaged discharge rate of lava at Kīlauea between mid-2011 and mid-2013 was approximately 2 m3/s, which is about half the long-term average rate over the course of Kīlauea's 1983–present ERZ eruption. This result implies that there was an increase in the proportion of lava stored versus erupted, a decrease in the rate of magma supply to the volcano, or some combination of both during this time period. In addition to constraining the time-averaged discharge rate of lava and the rates of magma supply and storage, topographic change maps derived from space-based TanDEM-X data provide insights into the four-dimensional evolution of Kīlauea's ERZ lava flow field. TanDEM-X data are a valuable complement to other space-, air-, and ground-based observations of eruptive activity at Kīlauea and offer great promise at locations around the world for aiding with monitoring not just volcanic eruptions but any hazardous activity that results in surface change, including landslides, floods, earthquakes, and other natural and anthropogenic processes.

Sistemas de gestión ambiental normalizados

OpenAIRE

Fronti de García, Luisa; Pahlen, Ricardo José María; D’Onofrio, Paula Alejandra

2004-01-01

La contabilidad ambiental presupone la existencia de un sistema de gestión ambiental. Dentro del sistema integral de la organización, el sistema de gestión ambiental permite la obtención de información oportuna y segura. Podríamos definir el sistema de gestión ambiental de un ente como el conjunto de medidas destinadas a prevenir el impacto negativo de las actividades del ente sobre el medio ambiente. El sistema de gestión ambiental (SGA) es aquella parte del sistema de gestión total que incl...

INFLUENCE OF DEM IN WATERSHED MANAGEMENT AS FLOOD ZONATION MAPPING

Directory of Open Access Journals (Sweden)

M. Alrajhi

2016-06-01

Full Text Available Despite of valuable efforts from working groups and research organizations towards flood hazard reduction through its program, still minimal diminution from these hazards has been realized. This is mainly due to the fact that with rapid increase in population and urbanization coupled with climate change, flood hazards are becoming increasingly catastrophic. Therefore there is a need to understand and access flood hazards and develop means to deal with it through proper preparations, and preventive measures. To achieve this aim, Geographical Information System (GIS, geospatial and hydrological models were used as tools to tackle with influence of flash floods in the Kingdom of Saudi Arabia due to existence of large valleys (Wadis which is a matter of great concern. In this research paper, Digital Elevation Models (DEMs of different resolution (30m, 20m,10m and 5m have been used, which have proven to be valuable tool for the topographic parameterization of hydrological models which are the basis for any flood modelling process. The DEM was used as input for performing spatial analysis and obtaining derivative products and delineate watershed characteristics of the study area using ArcGIS desktop and its Arc Hydro extension tools to check comparability of different elevation models for flood Zonation mapping. The derived drainage patterns have been overlaid over aerial imagery of study area, to check influence of greater amount of precipitation which can turn into massive destructions. The flow accumulation maps derived provide zones of highest accumulation and possible flow directions. This approach provide simplified means of predicting extent of inundation during flood events for emergency action especially for large areas because of large coverage area of the remotely sensed data.

Kinematic behaviour of a large earthflow defined by surface displacement monitoring, DEM differencing, and ERT imaging

Czech Academy of Sciences Publication Activity Database

Prokešová, R.; Kardoš, M.; Tábořík, Petr; Medveďová, A.; Stacke, V.; Chudý, F.

2014-01-01

Roč. 224, NOV 1 (2014), s. 86-101 ISSN 0169-555X R&D Projects: GA MŠk LM2010008 Institutional support: RVO:67985891 Keywords : earthflow * surface displacement * strain modelling * DEM differencing * kinematic behaviour Subject RIV: DE - Earth Magnetism, Geodesy, Geography Impact factor: 2.577, year: 2013

Investigações epidemiológicas sobre demência nos países em desenvolvimento Epidemiological research on dementia in developing countries

Directory of Open Access Journals (Sweden)

M Scazufca

2002-12-01

Full Text Available Na medida em que a população mundial está envelhecendo, a demência está se constituindo em importante problema de saúde pública, particularmente nos países em desenvolvimento. Investigações epidemiológicas nestes países são escassas e apresentam dificuldades metodológicas adicionais, principalmente no que se refere à adequação sociocultural dos instrumentos utilizados para a definição de casos. Tendo em vista estas preocupações, foi fundado o "Grupo de Pesquisa em Demência 10/66", que é constituído por uma rede internacional de pesquisadores, predominantemente de países em desenvolvimento. O nome do grupo tem como referência o paradoxo de que menos de 10% dos estudos populacionais sobre demência são dirigidos aos 2/3 ou mais de casos de pessoas com demência que vivem em países em desenvolvimento. O objetivo do artigo é atualizar informações da literatura sobre as diferenças de prevalência e incidência de demência encontradas em países desenvolvidos e em desenvolvimento.As the world population is ageing, dementia becomes an important public health problem, particularly in developing countries. Epidemiological research in these settings is scarce and present additional methodological difficulties, mainly regarding the socio-cultural adequacy of instruments used to identify cases of dementia. As a result of these concerns the 10/66 Dementia Research Group was founded to fill this gap. This is an international network of investigators, mostly from developing countries, and the group's name was based on the paradox that less than 10% of the population-based studies on dementia are directed to 2/3 or more cases of people with dementia living in developing countries. The aim of the paper is to update data in the literature regarding the differences in dementia prevalence and incidence seen in developed and developing countries.

Contabilidade ambiental o passaporte para a competitividade

Directory of Open Access Journals (Sweden)

Maria Elisabeth Pereira Kraemer

2002-03-01

Full Text Available Como todos os problemas ambientais provocaram grandes danos irreversíveis, que incidiram e incidem agora em todos os países subdesenvolvidos e desenvolvidos, nasce, então, como necessidade imperiosa, introduzir nos nossos sistemas econômicos a Contabilidade Ambiental, pois as organizações, até alguns anos atrás, preocupavam-se apenas com a eficiência dos sistemas produtivos. Chegamos a "era da revolução ambiental", e o ambiente não somente aparece como um conjunto de problemas relativos ao controle da contaminação, mas representa um custo no crescimento econômico. Neste sentido, o contador precisa de uma formação que se estenda além dos limites das técnicas e dos procedimentos. É necessário acrescentar o registro contábil do meio ambiente, dada a velocidade de sua afetação e a influência do mundo atual na utilização e disposição dos recursos naturais. Deve ser considerado como um dos princípios contábeis, onde é um desafio para a contabilidade. Precisa ser considerada como uma ciência contábil integrada, pois com a ciência ecológica e outras ciências são responsáveis pela natureza onde devem ser aplicados critérios de proteção ambiental, demonstrando que os recursos naturais constituem nosso principal capital. Partindo dessa premissa é que este trabalho está enfocando os seguintes tópicos: Responsabilidade Social da Empresa; A Empresa e o Meio Ambiente; Gestão Ambiental; Sistema de Gestão Ambiental; Ações para Preservar o Meio Ambiente - O Protocolo Verde, A Contabilidade, Custos Ambientais, Ativo Ambiental, Passivo Ambiental, Patrimônio Ambiental, Contabilidade Ambiental e Contabilidade Ambiental - o Passaporte para a Competitividade.

Can DEM time series produced by UAV be used to quantify diffuse erosion in an agricultural watershed?

Science.gov (United States)

Pineux, N.; Lisein, J.; Swerts, G.; Bielders, C. L.; Lejeune, P.; Colinet, G.; Degré, A.

2017-03-01

Erosion and deposition modelling should rely on field data. Currently these data are seldom available at large spatial scales and/or at high spatial resolution. In addition, conventional erosion monitoring approaches are labour intensive and costly. This calls for the development of new approaches for field erosion data acquisition. As a result of rapid technological developments and low cost, unmanned aerial vehicles (UAV) have recently become an attractive means of generating high resolution digital elevation models (DEMs). The use of UAV to observe and quantify gully erosion is now widely established. However, in some agro-pedological contexts, soil erosion results from multiple processes, including sheet and rill erosion, tillage erosion and erosion due to harvest of root crops. These diffuse erosion processes often represent a particular challenge because of the limited elevation changes they induce. In this study, we propose to assess the reliability and development perspectives of UAV to locate and quantify erosion and deposition in a context of an agricultural watershed with silt loam soils and a smooth relief. Erosion and deposition rates derived from high resolution DEM time series are compared to field measurements. The UAV technique demonstrates a high level of flexibility and can be used, for instance, after a major erosive event. It delivers a very high resolution DEM (pixel size: 6 cm) which allows us to compute high resolution runoff pathways. This could enable us to precisely locate runoff management practices such as fascines. Furthermore, the DEMs can be used diachronically to extract elevation differences before and after a strongly erosive rainfall and be validated by field measurements. While the analysis for this study was carried out over 2 years, we observed a tendency along the slope from erosion to deposition. Erosion and deposition patterns detected at the watershed scale are also promising. Nevertheless, further development in the

Israelische Public Diplomacy und ihre Wahrnehmung durch deutsche Journalisten

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Florian Fleischer

2014-07-01

Full Text Available Public Diplomacy stellt insbesondere für Staaten in internationalen Konflikten wie Israel ein wichtiges Kommunikationsinstrument dar, um ausländische Bevölkerungen zu erreichen. Der Artikel zeigt die Ergebnisse einer Studie, in der untersucht wurde, wie die israelische Public Diplomacy von deutschen Journalisten aufgenommen und verarbeitet wird. Journalisten kommt dabei eine Schlüsselrolle als Mittler zwischen dem israelischen Staat und der deutschen Bevölkerung zu. In Anlehnung an den Katalog der Public Diplomacy-Maßnahmen von Gilboa (2006 wurde die Relevanz einzelner Maßnahmen für Journalisten erfragt. Die Ergebnisse zeigen, dass persönliche Kontakte für Journalisten nach wie vor eine wichtige Quelle darstellen und nicht von Cyber-Public Diplomacy ersetzt werden können. Staatliche Public Diplomacy wird zwar wahrgenommen, jedoch wird ihre Objektivität bezweifelt, während NGOs und Stiftungen als vertrauenswürdiger eingestuft werden. Des Weiteren wird Israel in der Öffentlichkeit nach wie vor dominierend mit dem Nahostkonflikt identifiziert, was sich nach Meinung der befragten Journalisten auch in Zukunft nicht durch gezielte Öffentlichkeitsarbeit verhindern lässt.

Immanenz lesen

Directory of Open Access Journals (Sweden)

Alice Lagaay

2017-12-01

Full Text Available Der folgende Text eröffnete die Konferenz „Immanenz in zeitgenössischer Kunst und Philosophie“, die im Mai 2016 in Wien stattfand. Es handelt sich dabei um einen Reader mit Schlüsselaussagen zur Immanenz von Gilles Deleuze, Baruch de Spinoza, Giorgio Agamben, Henri Bergson, Francois Laruelle, Antonin Artaud und Friedrich Nietzsche. Dieser Reader wurde von Arno Böhler und Elisabeth Schäfer zusammengestellt. Susanne Valerie Granzer (S.V.G. verarbeitete den Inhalt zu einer Kollage und trug Fragmente der Texte zum Beginn der Konferenz vor. Sie wurde dabei gelegentlich von Alice Lagaay (A.L. unterbrochen, deren Einwürfe dazu dienten, Verbindungslinien zwischen den dichten theoretischen Texten und dem immanenten performativen Kontext zu ziehen, innerhalb dessen sie vorgetragen und aufgenommen wurden – d. h. dem Kontext der Konferenz. Der folgende Text bietet das Vorgetragene sowie die leichtherzigen – durchaus aber auch ernst gemeinten – Kommentare so dar, wie sie zur Aufführung kamen. Die Leser sind eingeladen, sich die Lebendigkeit (live-ness des Ereignisses vorzustellen und sie nachzuerleben (re-enact, wobei ihre eigenen Kommentare, Fragen und Überlegungen die Lektüre unterbrechen.

Tying of payment of maximum permissible franchise fee by an electric utility holding a monopoly position to the conclusion of new franchise agreement is an infringement of sections 26, sub-sec. 2, 35, sub-sec. 1 GWB. Mannheim Regional Court, decision of 23 Nov. 1994 - 70 120/94 (Kart.); Koppelung der Zahlung der hoechstzulaessigen Konzessionsabgabe durch ein Elektrizitaetsversorgungsunternehmen mit Monopolstellung an den Abschluss eines neuen Konzessionsvertrages als Verstoss gegen Para. 26 Abs. 2, Para. 35 Abs. 1 GWB. LG Mannheim, Urteil vom 23.11.1994 - 7O 120/94(Kart.)

Energy Technology Data Exchange (ETDEWEB)

Anon.

1995-12-31

If an electric utility holds a monopoly position in a local government district due to a valid demarcation agreement, its attempt to ty payment of the maximum permissible franchise fee to the local government to premature conclusion of a follow-up agreement for a term of 20 years is an infringement of section 26, sub-sec. 2 GWB (law against restraints on competition). The electric utility in this case is liable according to sections 26, sub-sec.2, 35, sub-sec. 1 GWB to pay compensation to the local government amounting to the difference between the maximum permissible franchise fees and the fees actually paid by the utility. (orig.) [Deutsch] Verfuegt ein Elektrizitaetsversorgungsunternehmen infolge eines bestehenden Demarkationsvertrages ueber ein Versorgungsmonopol auf dem Gebiet einer Gemeinde, so verstoesst sein Verhalten, die Zahlung der hoechstzulaessigen Konzessionsabgabe an diese Gemeinde an den vorzeitigen Abschluss eines neuen Konzessionsvertrages mit 20jaehriger Laufzeit zu koppeln, gegen Para. 26 Abs. 2 GWB. Das Versorgungsunternehmen ist in einem solchen Falle gemaess Para. 26 Abs. 2, 35 Abs. 1 GWB zum Ersatz des der Gemeinde entstandenen Schadens in Hoehe der Differenz zwischen den hoechstzulaessigen Konzessionsabgaben und den von dem Versorgungsunternehmen gezahlten Betraegen verpflichtet. (orig.)

Turbine airfoil with ambient cooling system

Science.gov (United States)

Campbell, Jr, Christian X.; Marra, John J.; Marsh, Jan H.

2016-06-07

A turbine airfoil usable in a turbine engine and having at least one ambient air cooling system is disclosed. At least a portion of the cooling system may include one or more cooling channels configured to receive ambient air at about atmospheric pressure. The ambient air cooling system may have a tip static pressure to ambient pressure ratio of at least 0.5, and in at least one embodiment, may include a tip static pressure to ambient pressure ratio of between about 0.5 and about 3.0. The cooling system may also be configured such that an under root slot chamber in the root is large to minimize supply air velocity. One or more cooling channels of the ambient air cooling system may terminate at an outlet at the tip such that the outlet is aligned with inner surfaces forming the at least one cooling channel in the airfoil to facilitate high mass flow.

CFD-DEM simulation of a conceptual gas-cooled fluidized bed nuclear reactor

International Nuclear Information System (INIS)

Almeida, Lucilla C.; Su, Jian

2015-01-01

Several conceptual designs of the fluidized-bed nuclear reactor have been proposed due to its many advantages over conventional nuclear reactors such as PWRs and BWRs. Amongst their characteristics, the enhanced heat transfer and mixing enables a more uniform temperature distribution, reducing the risk of hot-spot and excessive fuel temperature, in addition to resulting in a higher burnup of the fuel. Furthermore, the relationship between the bed height and reactor neutronics turns the coolant flow rate control into a power production mechanism. Moreover, the possibility of removing the fuel by gravity from the movable core in case of a loss-of-cooling accident increases its safety. High-accuracy modeling of particles and coolant flow in fluidized bed reactors is needed to evaluate reliably the thermal-hydraulic efficiency and safety margin. The two-way coupling between solid and fluid can account for high-fidelity solid-solid interaction and reasonable accuracy in fluid calculation and fluid-solid interaction. In the CFD-DEM model, the particles are modeled as a discrete phase, following the DEM approach, whereas the fluid flow is treated as a continuous phase, described by the averaged Navier-Stokes equations on a computational cell scale. In this work, the coupling methodology between Fluent and Rocky is described. The numerical approach was applied to the simulation of a bubbling fluidized bed and the results were compared to experimental data and showed good agreement. (author)

Thieves, Parent Abusers, Draft Dodgers... and Homicides?:The authenticity of Dem. 24.105

OpenAIRE

Canevaro, Mirko

2013-01-01

This article discusses the authenticity of the document preserved at Dem. 24.105. This purportedly reports two laws, one about theft and the other about parent abusers, draft dodgers and homicides. Scholars have often believed it to provide reliable information about the procedures of dike klopes, apagoge phonou and apagoge against atimoi. This analysis shows that the document is inconsistent with other, reliable, information about the same topics and its language does not conform to that of ...

Recent glacier mass balance and area changes in the Kangri Karpo Mountains from DEMs and glacier inventories

Science.gov (United States)

Wu, Kunpeng; Liu, Shiyin; Jiang, Zongli; Xu, Junli; Wei, Junfeng; Guo, Wanqin

2018-01-01

Due to the influence of the Indian monsoon, the Kangri Karpo Mountains in the south-east of the Tibetan Plateau is in the most humid and one of the most important and concentrated regions containing maritime (temperate) glaciers. Glacier mass loss in the Kangri Karpo is an important contributor to global mean sea level rise, and changes run-off distribution, increasing the risk of glacial-lake outburst floods (GLOFs). Because of its inaccessibility and high labour costs, information about the Kangri Karpo glaciers is still limited. Using geodetic methods based on digital elevation models (DEMs) derived from 1980 topographic maps from the Shuttle Radar Topography Mission (SRTM) (2000) and from TerraSAR-X/TanDEM-X (2014), this study has determined glacier elevation changes. Glacier area and length changes between 1980 and 2015 were derived from topographical maps and Landsat TM/ETM+/OLI images. Results show that the Kangri Karpo contained 1166 glaciers with an area of 2048.50 ± 48.65 km2 in 2015. Ice cover diminished by 679.51 ± 59.49 km2 (24.9 ± 2.2 %) or 0.71 ± 0.06 % a-1 from 1980 to 2015, although nine glaciers advanced. A glacierized area of 788.28 km2, derived from DEM differencing, experienced a mean mass loss of 0.46 ± 0.08 m w.e. a-1 from 1980 to 2014. Shrinkage and mass loss accelerated significantly from 2000 to 2015 compared to 1980-2000, consistent with a warming climate.

Políticas públicas y el medio ambiente

Directory of Open Access Journals (Sweden)

Genoveva Quintero Burgos

2013-05-01

desarrollo.  El descuido del Estado en el cumplimiento de su obligación de protección del medio ambiente genera conflictos, consiente la violación de derechos humanos, permite el deterioro del hábitat que repercute de manera sistemática en la salud de la población. La crisis ambiental ha irrumpido en la vida actual lo que provoca el desplazamiento forzoso de personas, la agudización de la pobreza, los cambios culturales consecuentes, la inseguridad alimentaria y la escalada de conflictos violentos. Ya no se trata en estos casos de las tradicionales disputas originadas por el acceso a recursos, sino de conflictos generados por la escasez de recursos que la degradación ambiental genera.  Sostenemos que existe una estrecha relación entre la situación ambiental y el goce efectivo de los derechos humanos, en especial el derecho a la Salud que, a más de ser un derecho en sí mismo, es condición para el ejercicio de los demás derechos. Sabemos que esta relación no se afinca solo en el reconocimiento de la existencia del derecho a vivir en un ambiente sano, sino en la obligación inexcusable del Estado de dirigir el proceso de desarrollo en un marco de derechos humanos; es decir, respetándolos y garantizándolos a través de las políticas públicas. Un ambiente degradado afectará el goce de otros derechos, ya que la falta de implementación de políticas públicas integrales provocan en el ambiente alteraciones que influyen en la salud, en las oportunidades de trabajo, en la educación y en el acceso a recursos financieros y naturales, alteraciones que solo han generado pobreza; y la pobreza, a su vez, repercute en la formación cultural y las posibilidades reales de acceder a la educación, a la información necesaria que estimule la participación. La falta de planificación de políticas sociales, de políticas ambientales claras, de políticas de salud que sean efectivas y sostenibles en el tiempo, trae como consecuencia la degradación ambiental y el

Ambient Air Quality Data Inventory

Data.gov (United States)

U.S. Environmental Protection Agency — The Office of Air and Radiation's (OAR) Ambient Air Quality Data (Current) contains ambient air pollution data collected by EPA, other federal agencies, as well as...

Investigation of effective thermal conductivity for pebble beds by one-way coupled CFD-DEM method for CFETR WCCB

Energy Technology Data Exchange (ETDEWEB)

Chen, Lei [Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, Anhui 230031 (China); University of Science and Technology of China, Hefei, Anhui 230027 (China); Chen, Youhua [University of Science and Technology of China, Hefei, Anhui 230027 (China); Huang, Kai [Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, Anhui 230031 (China); Liu, Songlin, E-mail: slliu@ipp.ac.cn [Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, Anhui 230031 (China); University of Science and Technology of China, Hefei, Anhui 230027 (China)

2016-05-15

Highlights: • A CFD-DEM coupled numerical model is built based on the prototypical blanket pebble bed. • The numerical model can be applied to simulate heat transfer of a pebble bed and estimate effective thermal conductivity. • The numerical model agrees well with the theoretical SZB model. • Effective thermal conductivity of pebble beds for WCCB is estimated by the current model. - Abstract: The mono-sized beryllium pebble bed and the multi-sized Li{sub 2}TiO{sub 3}/Be{sub 12}Ti mixed pebble bed are the main schemes for the Water-cooled ceramic breeder blanket (WCCB) of China Fusion Engineering Test Reactor (CFETR). And the effective thermal conductivity (k{sub eff}) of the pebble beds is important to characterize the thermal performance of WCCB. In this study, a one-way coupled CFD-DEM method was employed to simulate heat transfer and estimate k{sub eff}. The geometric topology of a prototypical blanket pebble bed was produced by the discrete element method (DEM). Based on the geometric topology, the temperature distribution and the k{sub eff} were obtained by the computational fluid dynamics (CFD) analysis. The current numerical model presented a good performance to calculate k{sub eff} of the beryllium pebble bed, and according to the modeling of the Li{sub 2}TiO{sub 3}/Be{sub 12}Ti mixed pebble bed, k{sub eff} was estimated with values ranged between 2.0 and 4.0 W/(m∙K).

Microcracking and macroscopic failure in intermetallic titanium aluminides; Mikrorissbildung und makroskopisches Versagen in intermetallischen Titanaluminiden

Energy Technology Data Exchange (ETDEWEB)

Wiesand-Valk, B. [GKSS-Forschungszentrum Geesthacht GmbH (Germany). Inst. fuer Werkstofforschung

2000-07-01

This paper deals with the correlations between microstructural disorder, that means statistical distribution of phases and local material properties, and macroscopic failure of disordered multiphase materials. On a microscopic level the microstructural disorder leads to randomly distributed local damage before failure (in brittle materials to microcracks) and eventually to localisation of damage. On a macroscopic level the value and scatter of fracture strength and its dependence on specimen size are essentially determined by the microstructural disorder. The failure behaviour is treated by using the discrete chain-of-bundles-model, which treats the details of the microstructure not explicitly but as locally distributed fluctuations of characteristical material parameters. The model has been verified by comparing with experimental results for four intermetallic titanium aluminides and its validity has been demonstrated. (orig.) [German] Die Arbeit behandelt die Zusammenhaenge zwischen der Stochastizitaet des Gefueges, das heisst, einer statistischen Verteilung von Phasen und lokalen Materialeigenschaften und dem makroskopischen Versagen von ungeordneten mehrphasigen Werkstoffen. Auf mikroskopischer Ebene fuehrt die Stochastizitaet des Gefueges vor dem Versagen zu lokalen Schaedigungen (in sproeden Werkstoffen zu Mikrorissen) und schliesslich (abhaengig vom Grad der Unordnung) zur Lokalisierung des Bruchgeschehens. Makroskopisch werden die Groesse und Streuung von Bruchfestigkeitswerten und ihre Probengroessenabhaengigkeit durch die mikrostrukturelle Unordnung wesentlich bestimmt. Dieses Versagensverhalten wird in dem diskreten Chain-of-Bundles-Modell beschrieben, das die Details der Mikrostruktur nicht explizit sondern als lokale statistische Schwankungen von charakteristischen Werkstoffparametern erfasst. Am Beispiel von vier ausgewaehlten Titan-Aluminiden wird das Modell validiert und verifiziert. (orig.)

La Educación Ambiental una herramienta clave de la Gestión Ambiental

Directory of Open Access Journals (Sweden)

María josé Esteves Ivanissevich

2013-06-01

Full Text Available Entendemos que el objeto de la educación ambiental no es el ambiente como tal, sino nuestra relación con él; la multiplicidad y diversidad de objetivos y la necesidad de anclar la intervención en cada contexto específico, hace de ésta una tarea inmensa y compleja. La provincia del Chubut registra desde el año 1999 un historial importante. Éste trabajo, toma lo realizado en la temática de eliminación de bolsas de polietileno en los espacios públicos, de forma interinstitucional y en ámbitos educativo formal y no formal. Con la hipótesis de que la educación ambiental constituye un instrumento de política ambiental preventivo atendiendo los problemas que afecten o pudieran afectar al ambiente; nos planteamos como objetivos: construir una ciudadanía ambientalmente responsable; Impulsar la formación y capacitación de docentes y actores sociales con una mirada ambiental; Contribuir a la conservación ambiental disponiendo de las nuevas tecnologías. La metodología se sustenta en una concepción que hace eje en el aumento de la participación de la sociedad. Desde el ámbito formal se trabajó durante el 2007-2011 con capacitaciones presenciales y a distancia, para docentes de nivel inicial y primario (434 capacitados, en forma conjunta con el Ministerio de Educación. El equipo de trabajo consta de cuatro profesionales del Ministerio de Ambiente y la colaboración de especialistas según el lugar y la temática. En el ámbito no formal se realizaron charlas y talleres con la comunidad (5826 capacitados; comunicación extrainstitucional por medios masivos de comunicación; campañas ambientales, trabajando en forma conjunta con organismos municipales, provinciales, no gubernamentales y privados. Se cubrieron 28 localidades en todo el territorio provincial. Se abarcó un gran número de docentes, quedando el trabajo con directores y supervisores, para pensar en la inclusión de las temáticas como los residuos sólidos urbanos, en el

Evaluación Ambiental Estratégica y Auditoría Contable Ambiental como Instrumentos para la Optimización de la Política Pública Ambiental en el Brasil

Directory of Open Access Journals (Sweden)

Gardênia Maria Braga de Carvalho

2014-01-01

Full Text Available La política ambiental es un conjunto de directrices, objetivos e instrumentos de acción que el poder público utiliza para producir efectos deseables sobre el medio ambiente. Algunos de esos instrumentos aunque no están institucionalizados, como la Evaluación Ambiental Estratégica (AAE, que objetiva desarrollar un estudio macro de los impactos causados al medio ambiente y a la comunidad; y la Auditoría Contable Ambiental (ACA, que consiste en la confrontación de las informaciones de los informes ambientales y contables. Así, se cuestiona: a ¿qué problemas generados por la ausencia de la AAE y de la ACA en la política ambiental brasileira? b ¿cómo la inserción de la AAE y de la ACA contribuiría para la solución de los problemas específicos detectados? Este artículo tiene como objetivo demostrar que existe una laguna en la política ambiental por desconsideración de esos instrumentos. El referencial teórico fue construido teniendo como base la contabilidad ambiental, auditoría ambiental y política pública. Se utilizó como método el análisis descriptivo en relación a sus objetivos, siendo realizada una pesquisa bibliográfica y exploratoria sobre los temas: políticas públicas, AAE y ACA. Se concluye que es necesaria la institucionalización de la AAE y de la ACA, en la fase inicial y final, respectivamente, del proceso de instalación y acompañamiento de emprendimientos impactantes al medio ambiente, pues el hecho de no ser compulsorios, revelaron una laguna en la política ambiental, tornándola frágil.

GIS-based debris flow source and runout susceptibility assessment from DEM data – a case study in NW Nicaragua

Directory of Open Access Journals (Sweden)

J. M. Vilaplana

2007-11-01

Full Text Available In October 1998, Hurricane Mitch triggered numerous landslides (mainly debris flows in Honduras and Nicaragua, resulting in a high death toll and in considerable damage to property. The potential application of relatively simple and affordable spatial prediction models for landslide hazard mapping in developing countries was studied. Our attention was focused on a region in NW Nicaragua, one of the most severely hit places during the Mitch event. A landslide map was obtained at 1:10 000 scale in a Geographic Information System (GIS environment from the interpretation of aerial photographs and detailed field work. In this map the terrain failure zones were distinguished from the areas within the reach of the mobilized materials. A Digital Elevation Model (DEM with 20 m×20 m of pixel size was also employed in the study area. A comparative analysis of the terrain failures caused by Hurricane Mitch and a selection of 4 terrain factors extracted from the DEM which, contributed to the terrain instability, was carried out. Land propensity to failure was determined with the aid of a bivariate analysis and GIS tools in a terrain failure susceptibility map. In order to estimate the areas that could be affected by the path or deposition of the mobilized materials, we considered the fact that under intense rainfall events debris flows tend to travel long distances following the maximum slope and merging with the drainage network. Using the TauDEM extension for ArcGIS software we generated automatically flow lines following the maximum slope in the DEM starting from the areas prone to failure in the terrain failure susceptibility map. The areas crossed by the flow lines from each terrain failure susceptibility class correspond to the runout susceptibility classes represented in a runout susceptibility map. The study of terrain failure and runout susceptibility enabled us to obtain a spatial prediction for landslides, which could contribute to landslide risk

Coupled DEM-CFD analyses of landslide-induced debris flows

CERN Document Server

Zhao, Tao

2017-01-01

This book reflects the latest research results in computer modelling of landslide-induced debris flows. The book establishes an understanding of the initiation and propagation mechanisms of landslides by means of numerical simulations, so that mitigation strategies to reduce the long-term losses from landslide hazards can be devised. In this context, the book employs the Discrete Element Method (DEM) and Computational Fluid Dynamics (CFD) to investigate the mechanical and hydraulic behaviour of granular materials involved in landslides – an approach that yields meaningful insights into the flow mechanisms, concerning e.g. the mobilization of sediments, the generation and dissipation of excess pore water pressures, and the evolution of effective stresses. As such, the book provides valuable information, useful methods and robust numerical tools that can be successfully applied in the field of debris flow research.

Application of the PROMETHEE technique to determine depression outlet location and flow direction in DEM

Science.gov (United States)

Chou, Tien-Yin; Lin, Wen-Tzu; Lin, Chao-Yuan; Chou, Wen-Chieh; Huang, Pi-Hui

2004-02-01

With the fast growing progress of computer technologies, spatial information on watersheds such as flow direction, watershed boundaries and the drainage network can be automatically calculated or extracted from a digital elevation model (DEM). The stubborn problem that depressions exist in DEMs has been frequently encountered while extracting the spatial information of terrain. Several filling-up methods have been proposed for solving depressions. However, their suitability for large-scale flat areas is inadequate. This study proposes a depression watershed method coupled with the Preference Ranking Organization METHod for Enrichment Evaluations (PROMETHEEs) theory to determine the optimal outlet and calculate the flow direction in depressions. Three processing procedures are used to derive the depressionless flow direction: (1) calculating the incipient flow direction; (2) establishing the depression watershed by tracing the upstream drainage area and determining the depression outlet using PROMETHEE theory; (3) calculating the depressionless flow direction. The developed method was used to delineate the Shihmen Reservoir watershed located in Northern Taiwan. The results show that the depression watershed method can effectively solve the shortcomings such as depression outlet differentiating and looped flow direction between depressions. The suitability of the proposed approach was verified.

Comparison Between Topographic Expression of RADARSAT and DEM in Simpang Pulai to Pos Selim, Malaysia

Directory of Open Access Journals (Sweden)

M.F.Ramli

2010-01-01

Full Text Available Radar and digital elevation model had been utilised in many structural studies. The main objective of this study is to compare the RADARSAT and digital elevation model for lineament interpretation which probably represent the main joints or faults along the Simpang Pulai to Pos Selim highway, Malaysia. These joints and faults may influence the instability along the highway. Manual comparison in terms of topographical aspect was undertaken between RADARSAT with 25 m spatial resolution and digital elevation model derived from 20 m contour interval of the topographical map. The previously interpreted lineaments of more than 2 km in the study area was draped over the RADARSAT and digital elevation model to compared whether the lineament concurred with the topographical representation. The interpreted lineaments were derived from Landsat TM of 1990 and 2002, where the DEM had been utilised in the negative lineament determination. It is concluded that the application RADARSAT is not very useful in terms of topographical expression in the structural geological interpretation for the study area compared to DEM derived from contour data. Further work is suggested before any conclusion can be confidently derived.

Recent glacier mass balance and area changes in the Kangri Karpo Mountains from DEMs and glacier inventories

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K. Wu

2018-01-01

Full Text Available Due to the influence of the Indian monsoon, the Kangri Karpo Mountains in the south-east of the Tibetan Plateau is in the most humid and one of the most important and concentrated regions containing maritime (temperate glaciers. Glacier mass loss in the Kangri Karpo is an important contributor to global mean sea level rise, and changes run-off distribution, increasing the risk of glacial-lake outburst floods (GLOFs. Because of its inaccessibility and high labour costs, information about the Kangri Karpo glaciers is still limited. Using geodetic methods based on digital elevation models (DEMs derived from 1980 topographic maps from the Shuttle Radar Topography Mission (SRTM (2000 and from TerraSAR-X/TanDEM-X (2014, this study has determined glacier elevation changes. Glacier area and length changes between 1980 and 2015 were derived from topographical maps and Landsat TM/ETM+/OLI images. Results show that the Kangri Karpo contained 1166 glaciers with an area of 2048.50 ± 48.65 km2 in 2015. Ice cover diminished by 679.51 ± 59.49 km2 (24.9 ± 2.2 % or 0.71 ± 0.06 % a−1 from 1980 to 2015, although nine glaciers advanced. A glacierized area of 788.28 km2, derived from DEM differencing, experienced a mean mass loss of 0.46 ± 0.08 m w.e. a−1 from 1980 to 2014. Shrinkage and mass loss accelerated significantly from 2000 to 2015 compared to 1980–2000, consistent with a warming climate.

Sensorless control of electromagnetic actuators for gas valves in spark ignition engines; Sensorlose Regelung elektromagnetischer Aktuatoren fuer die Betaetigung von Gaswechselventilen im Otto-Motor

Energy Technology Data Exchange (ETDEWEB)

Butzmann, S.

2000-07-01

A method for sensorless control of the impact speed of the armature of electromagnetic actuators is presented and described in great detail. The control algorithm was implemented in a compact electronic control unit for a 4-cylinder, 16-valve engine and was tested both in the laboratory and in a real engine. The method was first presented in September 1999 at the Frankfurt IHH, where it met with great interest. [German] In dieser Arbeit wurde ein Verfahren zur sensorlosen Regelung der Aufsetzgeschwindigkeit des Ankers bei elektromagnetischen Aktuatoren vorgestellt. Um den Anker zwischen den beiden Seiten des Luftspalts zu bewegen, werden zwei Elektromagnete abwechselnd bestromt, die Bewegung wird dabei von zwei Federn unterstuetzt. Fliesst waehrend eines solchen Umschwingvorgangs ein konstanter Strom durch die Spulen, so nimmt waehrend der Annaeherung an die Polflaeche die Magnetkraft mit der Luftspaltlaenge 1/l{sub L}{sup 2} zu, waehrend die entgegengesetzt wirkende Federkraft nur linear mit der Luftspaltlaenge l{sub L} steigt. Dies fuehrt prinzipiell zu einer unerwuenschten Beschleunigung des Ankers am Ende der Bewegung und damit zu einem harten Aufprall, der Laerm erzeugt und die Aktuatorlebensdauer reduziert. Ausgehend vom idealen Verfahren der zeitoptimalen Regelung, welches allerdings hohe Anforderungen an Sensorik und Rechenleistung stellt, wurde ein Algorithmus hergeleitet, welcher die zur Regelung der Aufsetzgeschwindigkeit erforderlichen Signale aus dem Stromverlauf in den Aktuatorspulen ableitet. Das neue Regelverfahren umgeht daher die Probleme, die durch den Einsatz von Sensoren entstehen. Waehrend der Ankerbewegung werden die Spulen zusaetzlich stimuliert, um eine hoehere Observationsgenauigkeit zu erzielen. Durch Adaption zwischen zwei aufeinanderfolgenden Ventilbetaetigungen und Regelung der Bewegung waehrend der Flugphase kann die Aufsetzgeschwindigkeit des Ankers praezise geregelt werden. Gleichzeitig konnte die zur Regelung erforderliche

Educación ambiental en la crisis y crisis de la educación ambiental

OpenAIRE

Delgado Huertos, Enrique

2012-01-01

Producción Científica Es preciso repensar la Educación Ambiental una vez asumido que los ciudadanos despues de tres décadas de mensajes y actividades educativas, si bien han cambiado su percepción de los problemas ambientales, apenas ha variado su actitud y su compromiso personal en favor del medio ambiente. La educación ambiental ha de perder el carácter anecdótico y pasar de actividades aisladas, repetitivas y desconectadas del resto de los aprendizajes a una intervención basada en la si...

Mechanical-biological waste conditioning with controlled venting - the Meisenheim mechanical-biological waste conditioning plant; Mechanisch-biologische Restabfallbehandlung nach dem Kaminzugverfahren - MBRA Meisenheim

Energy Technology Data Exchange (ETDEWEB)

Hangen, H.O. [Abfallwirtschaftsbetrieb Landkreis Bad Kreuznach, Bad Kreuznach (Germany)

1998-12-31

The decision of the rural district of Bad Kreuznach to propose creating facilities for mechanical-biological waste conditioning at the new northern Meisenheim landfill was consistent and correct. It will ensure that the material deposited at this new, state-of-the-art landfill is organically `lean` and can be deposited with a high density. Preliminary sifting of the material prior to depositing safeguards that no improper components are inadvertently included. Three years of operation warrant the statement that waste components that cannot be appropriately biologically conditioned should be eliminated prior to rotting. (orig.) [Deutsch] Die Entscheidung des Landkreises Bad Kreuznach, der neu eingerichteten Norddeponie Meisenheim eine MBRA vorzuschlaten, war auf jeden Fall konsequent und richtig. Es ist damit sicher gestellt, dass in diesem neuen nach dem Stand der Technik eingerichteten Deponiebereich von Anfang an ein Material eingelagert wird, das `organisch abgemagert` ist und mit hoher Einbaudichte eingebaut werden kann. Die Sichtung des gesamten Deponie-Inputs in der Vorsortierhalle gibt ein Stueck Sicherheit, dass keine nicht zugelassenen Stoffe verdeckt dem Ablagerungsbereich der Deponie zugefuehrt werden. Nach mehr als 3 Jahren Betriebszeit kann festgestellt werden, dass biologisch nicht sinnvoll behandelbare Abfallbestandteile vor dem Rotteprozess abgetrennt werden sollten. (orig.)

Spatial Analysis of BioAmbients

DEFF Research Database (Denmark)

Nielson, Hanne Riis; Nielson, Flemming; Pilegaard, Henrik

2004-01-01

Programming language technology can contribute to the development and understanding of Systems Biology by providing formal calculi for specifying and analysing the dynamic behaviour of biological systems. Our focus is on BioAmbients, a variation of the ambient calculi developed for modelling...

Indicadores de salud ambiental

Directory of Open Access Journals (Sweden)

Manuel Posada de la Paz

2004-12-01

Full Text Available Esta ponencia presenta una visión general del proyecto de Indicadores de Salud Ambiental, coordinado por la OMS a nivel internacional y liderado por el Centro de Investigación sobre el Síndrome del Aceite Tóxico y Enfermedades Raras (CISATER en España. En ella se describen los objetivos del proyecto, las gestiones realizadas y los resultados obtenidos durante la fase de viabilidad de este proyecto. El proyecto consiste en el establecimiento de un sistema de información sobre salud ambiental que permita desarrollar una vigilancia de los factores ambientales determinantes de los estados de salud, realizar comparaciones internacionales, elaborar políticas de acción, así como facilitar la comunicación con la ciudadanía. La OMS desarrolló una metodología para el desarrollo de estos indicadores dentro del marco conceptual de información ambiental DPSEEA (Fuerzas impulsoras, Presión, Estado, Exposición, Efecto, Acción y seleccionó un total de 55 indicadores (que incluyen 168 variables sobre 10 áreas de la salud ambiental. Durante la fase de viabilidad se predijo que podrían obtenerse el 89% de los indicadores. Sin embargo la recolección de los datos supuso muchas dificultades debido a la incompatibilidad de algunas variables en los sistemas de información españoles con las variables definidas por la OMS. A nivel de gestión del proyecto, la mayor dificultad radica en la disparidad de responsabilidades en materia de medio ambiente y salud entre las instituciones españolas. Además de la aportación técnica a la salud ambiental en España, un valor añadido de este proyecto ha sido el establecimiento de líneas de colaboración estrechas con los responsables de los diferentes Ministerios implicados.

DEM ASSESSMENT DERIVED FROM CLOSE RANGE PHOTOGRAMMETRY: A CASE STUDY FROM KADAVUR AREA, KARUR DISTRICT, TAMIL NADU, INDIA

Directory of Open Access Journals (Sweden)

S. Anbarasan

2012-07-01

Full Text Available Close-Range Photogrammetry is an accurate, cost effective technique of collecting measurements of real world objects and conditions, directly from photographs. Photogrammetry utilizes digital images to obtain accurate measurements and geometric data of the object or area of interest, in order to provide spatial information for Engineering design, spatial surveys or 3D modeling. The benefits of close-range Photogrammetry over other field procedures are purported to be: Increased accuracy; complete as-built information; reduced costs; reduced on-site time; and effective for small and large projects. The same basic principle of traditional Aerial Photogrammetry can be applied to stereoscopic pictures taken from lower altitudes or from the ground. Terrestrial, ground-based, and close-range are all descriptive terms that refer to photos taken with an object-to-camera distance less than 300m (1000 feet. (Matthews, N.A, 2008. Close range Photogrammetry is a technique for obtaining the geometric information (e.g. position, distance, size and shape of any object in 3D space that was imaged on the two dimensional (2D photos, (Wolf, P.R, et.al, 2000 DEM Generation requires many processing and computation, such as camera calibration, stereo matching, editing, and interpolation. All the mentioned steps contribute to the quality of DEM. Image on close range Photogrammetry can be captured using three kind of camera: metric camera, semi-metric camera, and non-metric camera (Hanke, K., et.al, 2002. In this paper DEM quality assessed at Kadavur area, Karur district, Tamil Naudu, India using Close Range Photogrammetry technique, Commercial Digital Camera and Leica Photogrammetry Suite.

EXTRACTING PRECISE AND AFFORDABLE DEMS DESPITE OF THE CLOUDS. AJAX: THE JOINING OF RADAR AND OPTICAL STRENGTHS

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1 L. Cunin

2012-07-01

The DEMs extracted from TerraSAR-X and HRS proved extremely consistent with each other, showing a mean difference of 0.80m. This allows to propose a unified Elevation30 product to the users, with a guaranteed accuracy materialized into the product through a dedicated vertical Accuracy Commitment Mask.

Medio ambiente y educación ambiental: representaciones sociales de los profesores en formación

Directory of Open Access Journals (Sweden)

Raúl Calixto Flores

2010-06-01

Full Text Available Una de las líneas actuales de investigación educativa que aporta elementos valiosos para comprender los procesos de formación de los sujetos es la que corresponde a las representaciones sociales. En este artículo se describen los aspectos centrales de la investigación Representaciones del medio ambiente de los estudiantes de la licenciatura en educación primaria. Con las representaciones los estudiantes discriminan espacio-temporalmente los elementos del medio ambiente, estableciendo correspondencias con las prácticas sociales. Entre los resultados de la investigación referida se encuentra la existencia de una relación entre las representaciones del medio ambiente y las corrientes de la educación ambiental.

Medio ambiente y educación ambiental: representaciones sociales de los profesores en formación

Directory of Open Access Journals (Sweden)

Raúl Calixto Flores

2010-01-01

Full Text Available Una de las líneas actuales de investigación educativa que aporta elementos valiosos para comprender los procesos de formación de los sujetos es la que corresponde a las representaciones sociales. En este artículo se describen los aspectos centrales de la investigación Representaciones del medio ambiente de los estudiantes de la licenciatura en educación primaria. Con las representaciones los estudiantes discriminan espaciotemporalmente los elementos del medio ambiente, estableciendo correspondencias con las prácticas sociales. Entre los resultados de la investigación referida se encuentra la existencia de una relación entre las representaciones del medio ambiente y las corrientes de la educación ambiental.

Feeding mechanisms and ecology of pycnodont fishes (Neopterygii, Pycnodontiformes

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J. Kriwet

2001-01-01

seit dem Eozän ausgestorbenen Neopterygier-Gruppe der Pycnodontier wird im Vergleich zu einigen rezenten Halecostomen (Amia calva, verschiedene Teleosteer untersucht und diskutiert. Dazu wird eine kurze Übersicht über die funktionellen Einheiten des Pycnodontierschädels gegeben. Die Kinematik des Nahrungsaufnahmeapparates der Pycnodontier stellt einen Übergang von der einfachen, stereotypischen Kinematik primitiver Actinopterygier zu der modulierenden Kinematik fortschrittlicher Teleosteer dar und wird hier als limitierte, modulierende Kinematik bezeichnet. Zwei structurelle Spezialisationen, die bei Halecostomi entwickelt sind (Operculum mit distinkten m. levator operculare und das Interoperculare mit dem interoperculare Ligament fehlen bei Pycnodontiern, wogegen sie die zwei primitiven Verbindungen zwischen den epaxialen Muskeln und dem Neurocrani-um und zwischen den hypaxialen Muskeln, dem Cleithrum und dem Sternohyoidmuskel für die direkte Unterkieferabsenkung beibehalten. Fortschrittliche Pycnodontier entwickeln aber eine neue Struktur (bewegliches Maxillare und Premaxillare zur Erweiterung des buccopharyngealen Raumes, die bei Halecomorphen als auch ursprünglichen Pycnodontiern (z. B. †Ardua-frons, †Mesturus fehlt: Maxillare und Prämaxillare werden aus dem Schädelverband gelöst und beide werden gegeneinander beweglich Während der Mandibulardepression schwingt das nun freie Maxillare um einen vorderen Artikulationszapfen antero-ventrad und drückt das Prämaxillare nach vorne in Richtung Beute. Die ökomorphologische Untersuchung zeigt, dass der Rachenraum als „truncated-cone”, wie er für Teleosteer mit ausgeprägtem Schnappsaugmechanismus typisch ist, rekonstruiert werden kann. Die Kinematik des Kieferapparates der Pycnodontier repräsentiert somit eine Kombination aus reinem Beißen und Schnappsaugen. Pycnodontier ernährten sich vermutlich omnivor sowohl von schalentragenden als auch schalenlosen Invertebraten ernährten. Vermutlich waren

Direct regional quasi-geoid determination using EGM2008 and DEM: A case study for Mainland China and its vicinity areas

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Jin Li

2015-11-01

Full Text Available Earth's gravity model (EGM helps people better determine the figure of Earth, which is generally represented by a global geoid. For a considerable amount of practical applications, people use quasi-geoid to approximate the geoid, thus the quasi-geoid is also treated as an important height datum. In this study we revisit the method to directly determine regional quasi-geoid using EGM and digital elevation model (DEM, on the basis of Molodensky theory. According to the method we obtain a 5′ × 5′ quasi-geoid for Mainland China and its vicinity areas, based on the EGM2008 gravitational potential model and the Shuttle Radar Topography Mission (SRTM DEM model. By comparing height anomalies derived from EGM2008 with observations at 70 GPS/leveling points in areas including northwest, mid-west, mid-east and southeast of China, we find that the 5′ × 5′ EGM2008 quasi-geoid well fits the GPS/leveling results, with average deviations less than 10 cm for the selected areas in east China (with mainly plain topography and ∼20 cm for the selected areas in west China (highland or mountainous areas. We also discuss a few technical issues for directly determining height anomalies based on EGM and DEM, under the frame of Molodensky theory.

Validating Firewalls in Mobile Ambients

DEFF Research Database (Denmark)

Nielson, Flemming; Nielson, Hanne Riis; Hansen, René Rydhof

1999-01-01

The ambient calculus is a calculus of computation that allows active processes (mobile ambients) to move between sites. A firewall is said to be protective whenever it denies entry to attackers not possessing the required passwords. We devise a polynomial time algorithm for rejecting proposed...

Rezension zu: Yvonne Haffner, Beate Krais: Arbeit als Lebensform? Frankfurt am Main u.a.: Campus Verlag 2008

Directory of Open Access Journals (Sweden)

Daniela Heitzmann

2009-07-01

Full Text Available Nachdem der Mythos des unerbittlich arbeitenden Wissenschaftlers, der sich mit Haut und Haar ‚seiner‘ Forschung verschrieben hat, langsam zu bröckeln beginnt, stellt sich aus der Genderperspektive die Frage nach der Bedeutung der Arbeitskultur für die fortbestehende Unterrepräsentanz von Frauen in der Wissenschaft, besonders in leitenden Positionen. Gleichzeitig trägt die allmähliche ‚Entdeckung‘ des Privaten für Männer, die nun auch Väter und Lebenspartner sein sollen (können, zur Entmythologisierung bei. Der vorliegende Sammelband widmet sich dem Balance-Akt zwischen Arbeits- und Privatleben, den Frauen und Männer zu leisten haben. Auf Grundlage zahlreicher empirischer Untersuchungen wird ein umfassendes und erkenntnisreiches Panorama über die Verquickungen individueller und struktureller Anforderungen an berufstätige Akademikerinnen und Akademiker vorgelegt.

Proceedings on the seminar on small hydroelectric installations: Practice report and current development; Beitraege zum Seminar Kleinwasserkraft: Praxis und aktuelle Entwicklung

Energy Technology Data Exchange (ETDEWEB)

NONE

1997-12-31

This seminar on small hydroelectric installations informs on aspects of construction and administrative aspects. But above all, questions of machinery are dealt with. The book gives an overview of turbine types, topical recent developments in the sector of small hydroelectric power stations, and modern opportunities for fast and inexpensive design of power station components. Beyond the discussion of technical issues, the seminar wants to further contacts between science, turbine manufacturers, consultants and plant operators. (orig.) [Deutsch] Das Seminar Kleinwasserkraft gibt eine Uebersicht ueber bauliche Gestaltung und behoerdliche Aspekte. Vorallem behandelt es aber maschinenbauliche Problemstellungen. Es zeigt einen Ueberblick ueber Turbinentypen, aktuelle Neuentwicklungen im Kleinwassersektor, sowie moderne Moeglichkeiten zum schnellen und preiswerten Design von Kraftwerkskomponenten. Neben dem technischen Teil dient das Seminar auch der Foerderung des Kontakts zwischen Wissenschaft, Turbinenherstellern, Consultants und Anlagenbetreibern. (orig.)

Halt mich fest! Picasso und die Identitätskrise der Ikonographie als Mutter der Kunst-Interpretation Hold Me Tight! Picasso and the Identity Crisis of Iconography as the Mother of Art Interpretation

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Bärbel Küster

2004-11-01

Full Text Available Picassos Ölgemälde La Vie (Das Leben von 1903 gilt als ein Bild, in dem der junge Picasso den Tod eines nahen Freundes und zugleich die Ablösung vom Elternhaus verarbeitet. Becht-Jördens und Wehmeier spitzen diese Interpretation durch die ikonographische Lesart einzelner Gesten zu einer tiefenpsychologischen Ausdeutung der Beziehung zwischen Künstler-Sohn und Mutter zu.Picasso’s oil painting La Vie (Life from 1903 is considered to be an image in which the young Picasso simultaneously reconciles the death of a close friend and the separation from his parents. Becht-Jördens and Wehmeier hone this interpretation with an iconographic reading of individual gestures, bringing it to a subconscious expression of the relationship between the artist son and his mother.

Der digitalisierte Steuerpflichtige

Directory of Open Access Journals (Sweden)

Ehrke-Rabel, Tina

2017-12-01

Full Text Available Der digitalisierte Steuerpflichtige ist digitalisiert in seinem Wirtschaften und digitalisiert in seiner Interaktion mit der Finanzverwaltung. Digitale und digitalisierte Wirtschaftsmodelle stellen sowohl den Gesetzgeber als auch den Abgabenvollzug vor Herausforderungen, weil einerseits die physische Anknüpfung von Sachverhalten an staatliches Territorium nahezu unmöglich wird und andererseits staatliche Kontrolle von digitalen Wirtschaftsmodellen im derzeitigen System schwer möglich ist. Halten sich Steuerpflichtige an ihre Pflichten gegenüber der Finanzverwaltung, bietet die Digitalisierung jedoch Chancen für die Effizienzsteigerung des Vollzuges. Die Balance zwischen staatlicher Effizienz durch Digitalisierung und Schutz des Einzelnen vor übermäßigen Eingriffen in das Grundrecht auf Wahrung der Privatsphäre einerseits und dem Recht auf gute Verwaltung andererseits scheint derzeit jedoch noch nicht umfassend erreicht.

Percolation experiments to determine fluid-matrix interaction (with particular regard to pretreatment of the drill core); Kerndurchstroemungsversuche zur Ermittlung von Fluid-Matrix-Wechselwirkungen (unter besonderer Beruecksichtigung der Kernvorbehandlung)

Energy Technology Data Exchange (ETDEWEB)

Martin, M; Seibt, A [TU Bergakademie Freiberg (Germany). Inst. fuer Bohrtechnik und Fluidbergbau; Hoth, P [GeoForschungsZentrum Potsdam (Germany)

1997-12-01

The injection of fluids into sandstone reservoirs leads to interactions between these waters, the reservoir rocks, and the formation fluids. Estimations about possible permeability reducing processes caused by these interactions are therefore of great importance for the exploitation of sandstone aquifers as geothermal reservoirs. Percolation experiments under in situ conditions with core samples from North German geothermal boreholes were done in order to investigate these fluid-rock interactions. (orig./AKF) [Deutsch] Die Injektion von Fluiden in Aquiferspeicher fuehrt zu Wechselwirkungen zwischen dem Speichergestein, den Formationsfluiden und den injizierten Loesungen. Fuer die Bewirtschaftung der Speicher sind insbesondere Kenntnisse ueber moegliche Permeabilitaetsreduzierungen durch diese Wechselwirkungen von Bedeutung. Mit Hilfe von Kern-Durchstroemungsexperimenten, durchgefuehrt unter lagerstaettenaehnlichen Bedingungen mit Original- bzw. modifizierten Fluiden, wurde daher das Durchstroemungsverhalten von unterschiedlich ausgebildeten Reservoirsandsteinen aus norddeutschen Geothermiebohrungen untersucht. (orig./AKF)

Communication of technical building systems. Fundamentals; Kommunikation technischer Gebaeudesysteme. Grundlagen

Energy Technology Data Exchange (ETDEWEB)

Kranz, H.R. [Siemens AG, Karlsruhe (Germany)

1995-12-31

In chapter 17 of the anthology about building control the communication between and with technical building systems is described. The following aspects are discussed: From the matrix cable to the standard bus, data transmission, communication terms, components of communication systems, type of data transmission, types of connection, networks, protocols, the ISO/OSI reference model, application of automation in the field of communication, services and profiles, communication objects. (BWI) [Deutsch] Kapitel 17 des Sammelbandes ueber Building Control ist dem Thema der Kommunikation zwischen und mit technischen Gebaeudesystemen gewidmet. In diesem Zusammenhang werden folgende Themen angesprochen: Vom Matrixkabel zum Standard-Bus; Daten-Transport; Kommunikations-Begriffe; Komponenten der Kommunikations-Systeme; Art der Datenuebertragung; Verbindungsarten, Netze, Protokolle; Das ISO/OSI Referenzmodell; Automation als Anwendung in der Kommunikation; Dienste und Profile; Kommunikationsobjekte. (BWI)

Ambient diagnostics

CERN Document Server

Cai, Yang

2014-01-01

Part I. FundamentalsIntroductionWhat is Ambient Diagnostics?Diagnostic ModelsMultimedia IntelligenceCrowd SourcingSoft SensorsScience of SimplicityPersonal DiagnosesBasic AlgorithmsBasic ToolsSummaryProblemsTransformationEarly Discoveries of Heartbeat PatternsTransforms, Features, and AttributesSequential FeaturesSpatiotemporal FeaturesShape FeaturesImagery FeaturesFrequency Domain FeaturesMulti-Resolution FeaturesSummaryProblemsPattern RecognitionSimilarities and DistancesClustering MethodsClassification MethodsClassifier Accuracy MeasuresSummaryProblemsPart II. Multimedia IntelligenceSound RecognitionMicrophone AppsModern Acoustic Transducers (Microphones)Frequency Response CharacteristicsDigital Audio File FormatsHeart Sound SensingLung Sound SensingSnore MeterSpectrogram (STFT)Ambient Sound AnalysisSound RecognitionRecognizing Asthma SoundPeak ShiftFeature CompressionRegroupingNoise IssuesFuture ApplicationsSummaryProblemsColor SensorsColor SensingHuman Color VisionColor SensorsColor Matching ExperimentsC...

Deep Convolutional Generative Adversarial Network for Procedural 3D Landscape Generation Based on DEM

OpenAIRE

Wulff-Jensen, Andreas; Rant, Niclas Nerup; Møller, Tobias Nordvig; Billeskov, Jonas Aksel

2018-01-01

This paper proposes a novel framework for improving procedural generation of 3D landscapes using machine learning. We utilized a Deep Convolutional Generative Adversarial Network (DC-GAN) to generate heightmaps. The network was trained on a dataset consisting of Digital Elevation Maps (DEM) of the alps. During map generation, the batch size and learning rate were optimized for the most efficient and satisfying map production. The diversity of the final output was tested against Perlin noise u...

Musikalische Symbole: Ähnlichkeiten zwischen Symbolen aus der Altsteinzeit und frühen kindlichen Bildzeichen

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Wolfgang Weinlich

2017-09-01

Full Text Available Die Arbeit ist dem klassischen Parallelismus von steinzeitlichen Bildfunden und frühen Kinderzeichnungen gewidmet. Ist ein solcher heute noch möglich? Der prähistorische Anfang von Bildsprache dürfte neuesten Forschungen zufolge länger zurückliegen als bisher angenommen. Der erste Teil der Arbeit widmet sich hierzu etwas ausführlicher den Funden und Interpretationen. Auf der Suche nach einem möglichen theoretischen Kontext für besagten Parallelismus kommentiert die Arbeit sodann die Ausdruckssemiologie Arno Sterns und die evolutionstheoretischen Anstrengungen Irenäus Eibl-Eibesfeldts. Fündig wird sie allerdings erst bei den Ausführungen Susan Petrillis zur Ikonizität von Sprache. Bei gleichzeitiger Zurückweisung verfänglicher Biologismen bietet die Arbeit so eine Hermeneutik, die jenen klassischen Parallelismus immer noch ermöglicht, jedoch nur als emphatische Affirmation von Anfang, Setzung und Autonomie menschlicher Bildsprache.

Prevalence of presenile dementia in a tertiary outpatient clinic Prevalência de demência pré-senil num ambulatório terciário

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Satomi Fujihara

2004-09-01

Full Text Available There are very few reports about prevalence of presenile dementia in Brazil. We reviewed files of patients evaluated with early onset of cognitive impairment in our institution. Among 141 patients (61% males there was no difference between gender by age at onset or at first evaluation. We have observed an increasing number of patients after 50 years. The most frequent causes were: vascular dementia (36.9%, Alzheimer's disease (20.3% and traumatic brain injury (9.2%. There was difference among dementia type by age of onset and first evaluation, educational level and length of dementia. These results may be compared with those from other neurologic services in order to replicate or confirm these results.Em nosso meio há raros estudos que verifiquem quais as causas mais prevalentes de demência pré-senil. Avaliamos retrospectivamente os prontuários de pacientes com início precoce de alterações cognitivas, ambulatório de Neurologia da Cognição do Hospital Santa Marcelina. Entre os 141 sujeitos (61% de homens não houve diferença quanto às idades de início e à primeira consulta e escolaridade entre os sexos. Observamos aumento no número de demência após os 50 anos. A causa mais freqüente foi vascular (36,9%, seguida por doença de Alzheimer (20,3% e secundária a trauma cranio encefálico (9,2%. Houve diferença entre os tipos de demência quanto à idade na primeira consulta e idade de início, escolaridade e duração do quadro. Ao contrário de outros estudos o diagnóstico mais freqüente foi demência vascular. Novos estudos em nosso meio deverão ser realizados para avaliar este achado nas demências de início precoce.

La crisis del medio ambiente

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Juan Carlos Quintero Vélez

2013-07-01

Full Text Available Este artículo, introducción al tema del medio ambiente, pretende proporcionar conceptos básicos para analizar y dimensionar el impacto que genera el hombre sobre los sistemas que soportan la vida. Para entender estos problemas, es indispensable partir de un análisis básico de la relación entre el hombre actual, su medio ambiente, sus necesidades y sus actividades. El autor revisa los antecedentes, las causas y las consecuencias de la crisis ambiental internacional, e intenta dar explicación a la problemática nacionalen este campo, y establecer los puntos más críticos en Colombia. Finalmente, con base en los parámetros establecidos por el gobierno, se presenta el concepto de“desarrollo sostenible" como modelo que interrelaciona los procesos económicos, sociales y tecnológicos con el medio ambiente.