Processamento de fotomicrografias por meio da transformada wavelet starlet

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

La conservazione viva dell'esistente. Storia, progetto e restauro nell'opera di Josef Wiedemann

La tesi analizza, nel quadro del secondo dopoguerra, quattro casi studio scelti tra le opere di ricostruzione dell’architetto Josef Wiedemann (1910-2001) nel centro di Monaco di Baviera: Odeon (1951-1952), Alte Akademie (1951-1955), Siegestor (1956-1958) e Glyptothek (1961-1972). L’architetto si occupa di opere simbolo della città di Monaco, affrontando la loro ricostruzione come un tema fondante per la storia e l’identità del popolo bavarese, ma soprattutto come un’occasione per definire un metodo d’intervento sulle rovine della guerra. Il suo lavoro è caratterizzato infatti per la ricerca costante di una sintesi tra interesse per la conservazione dell’antico e apertura al nuovo; ispirandosi all’insegnamento del maestro Hans Döllgast, Wiedemann traccia una nuova originale strada per l’intervento sull’antico, segnata da una profonda capacità tecnico-progettuale e dall'attenzione alle nuove esigenze a cui deve rispondere un’architettura contemporanea. Partendo dai suoi scritti e dalle sue opere, si può rilevare un percorso coerente che, partendo dalla conoscenza della storia dell'edificio, ripercorrendone l’evoluzione dallo stato che potremmo definire “originario” allo stato di rovina, giunge a produrre nel progetto realizzato una sintesi tra il passato e il futuro. L'architetto, nella visione di Wiedemann, è chiamato a un compito di grande responsabilità: conoscere per progettare (o ri-progettare) un edificio che porta impressi su di sé i segni della propria storia. Nel metodo che viene messo progressivamente a punto operando nel corpo vivo dei monumenti feriti dalla guerra, è percepibile fino a distinguerlo chiaramente l’interesse e l’influenza del dibattito italiano sul restauro. La conservazione “viva” dell'esistente, così come viene definita da Wiedemann stesso, si declina in modo diverso per ogni caso particolare, approdando a risultati differenti tra loro, ma che hanno in comune alcuni principi fondamentali: conoscere, ricordare, conservare e innovare.

From big smartphone data to worldwide research: The Mobile Data Challenge

This paper presents an overview of the Mobile Data Challenge (MDC), a large-scale research initiative aimed at generating innovations around smartphone-based research, as well as community-based evaluation of mobile data analysis methodologies. First, we review the Lausanne Data Collection Campaign (LDCC), an initiative to collect unique longitudinal smartphone dataset for the MDC. Then, we introduce the Open and Dedicated Tracks of the MDC, describe the specific datasets used in each of them, discuss the key design and implementation aspects introduced in order to generate privacy-preserving and scientifically relevant mobile data resources for wider use by the research community, and summarize the main research trends found among the 100+ challenge submissions. We finalize by discussing the main lessons learned from the participation of several hundred researchers worldwide in the MDC Tracks.

Fission track analyses of ODP Hole 129-800A samples

Four models of fission track annealing in apatite are compared with measured fission track lengths in samples from Site 800 in the East Mariana Basin, Ocean Drilling Program Leg 129, given an independently determined temperature history. The temperature history of Site 800 was calculated using a one-dimensional, compactive, conductive heat flow model assuming two end-member thermal cases: one for cooling of Jurassic ocean crust that has experienced no subsequent heating, and one for cooling of Cretaceous ocean crust. Because the samples analyzed were only shallowly buried and because the tectonic history of the area since sample deposition is simple, resolution of the temperature history is high. The maximum temperature experienced by the sampled bed is between 16°-21°C and occurs at 96 Ma; temperatures since the Cretaceous have dropped in spite of continued pelagic sediment deposition because heat flow has continued to decay exponentially and bottom-water temperatures have dropped. Fission tracks observed within apatite grains from the sampled bed are 14.6 +/- 0.1 µm (1 sigma) long. Given the proposed temperature history of the samples, one unpublished and three published models of fission track annealing predict mean track lengths from 14.8 to 15.9 µm. These models require temperatures as much as 40°C higher than the calculated paleotemperature maximum of the sampled bed to produce the same degree of track annealing. Measured and predicted values are different because annealing models are based on extrapolation of high temperature laboratory data to geologic times. The model that makes the closest prediction is based on the greatest number of experiments performed at low temperature and on an apatite having composition closest to that of the core samples.

Lead 210 concentrations in sediments of the Arabian Sea

In order to evaluate bioturbation in abyssal Arabian-Sea sediments of the Indus fan profiles of 210Pb (half-life: 22.3 yr) and 234Th (half-life: 24.1 d) were measured in cores collected during September and October 1995 and April 1997, respectively. The density and composition of epibenthic megafauna and lebensspuren were determined in vertical seafloor photographs during April 1997. Mean eddy-diffusive mixing coefficients according to the distribution of excess 210Pb ( 210Pb-DB) were 0.072±0.028, 0.068±0.055, 0.373±0.119, 0.037±0.009 and 0.079±0.119 cm**2 yr**-1 in the northern, western, central, eastern and southern abyssal Arabian sea, respectively. Mean eddy-diffusive mixing coefficients according to the distribution of excess 234Th (234Th-DB) were 0.53, 1.64 and 0.47 cm**2 yr**-1 in the northern, western and central abyssal Arabian Sea, respectively. Mobile epibenthic megafauna at the western, northern, central and southern study sites were dominated by ophiuroids, holothurians, ophiuroids and natant decapods (the respective densities were 100, 82, 29 and 6 individuals 1000 m**-2). The northern study site was characterized by a high abundance of spoke traces and fecal casts. The central site showed spoke traces and many tracks. The southern site displayed the highest abundance of spoke traces, whereas at the western site hardly any lebensspuren were observed. There is evidence for at least two functional endmember communities in the Arabian Sea. In the northwestern Arabian Sea (WAST) vertical particle displacement seems to be dominated by macrofauna and primarily eddy-diffusive. In the southern Arabian Sea (SAST) non-local and 'incidental' mixing due to spoke-trace producers might become more important and superimpose reduced eddy-diffusive mixing. With respect to biological data CAST is an intermediate location. Given the biological data, average 210Pb-DB is higher and decimeter-scale variability of 210Pb-DB smaller at CAST than expected. These findings indicate that in a mixture of both endmember communities the organisms may interact in way that increases values of biodiffusivity, as reflected by 210Pb-DB, and reduces decimeter-scale 210Pb-DB heterogeneity in comparison to the simple sum of the isolated effects of the endmembers. For time scales <100 years there was no evidence for a relationship between food supply (POC flux) and bioturbation intensity, as reflected by 210Pb-DB and 234Th-DB. Bioturbation intensity should be controlled primarily by the composition of the benthic fauna, its specific adaptation to the environmental setting, and the abundance of each species of the benthic community. Food supply can have only an indirect influence on bioturbation intensity. In certain parts of the ocean the a priori overall positive relationship between POC flux and biodiffusivity might include restricted intervals displaying no or even negative relations.

Análisis de algoritmos para posicionamiento de aeronaves mediante respuestas SSR utilizando recepción omnidireccional

El transporte aéreo constituye un sector estratégico para el crecimiento económico de cualquier país. El sistema de gestión de tráfico aéreo ATM tiene como objetivo el movimiento seguro y eficiente de las aeronaves dentro del espacio aéreo y de los aeropuertos, siendo la seguridad, en la fase táctica, gestionada por el servicio de control de la circulación aérea. Mediante los procesos de control el tráfico aéreo es vigilado a través de sensores, regulado y guiado de forma organizada y segura. Es precisamente sobre la vigilancia donde se enfoca el contenido de la tesis, en el desarrollo de nuevos conceptos que proporcionen información de vigilancia de ‘bajo coste’ basados en las señales existentes proporcionadas por la infraestructura actual de radar secundario y por los sistemas de posicionamiento basados en satélite que utiliza la ADS-B. El conocimiento y acceso en tiempo real a las trayectorias de las aeronaves es un elemento de valor añadido no sólo para la provisión de los servicios de control de tránsito aéreo, sino para todos los actores del transporte aéreo o de la investigación, siendo uno de los elementos clave en el concepto operacional de los dos grandes proyectos tecnológicos, SESAR en Europa y NextGen en EE.UU.. En las últimas décadas el control de la circulación aérea en espacios aéreos de media y alta densidad de tráfico se ha basado en tecnologías complejas que requieren importantes infraestructuras como son el radar primario de vigilancia (PSR) y el radar secundario de vigilancia (SSR). La filosofía de los programas SESAR y NextGen siguiendo las directrices de la OACI es la de alejarse de las tecnologías basadas en tierra para evolucionar hacia nuevas tecnologías más dinámicas basadas en satélite como la ADS-B. Pero hasta que la implementación y operación de la ADS-B sea completa, existirá un período de transición que implica la coexistencia de aeronaves equipadas o no con ADS-B. El objetivo de la presente Tesis es determinar las metodologías y algoritmos más adecuados para poder hibridar las dos tecnologías descritas anteriormente, utilizando para ello un receptor de bajo coste con antena estática omnidireccional, que analice todas las señales presentes en el canal que comparten el SSR y ADS-B. Mediante esta hibridación se podrá obtener la posición de cualquier aeronave que transmita respuestas a interrogaciones SSR, en cualquiera de sus modos de trabajo, o directamente mensajes de posición ADS-B. Para desarrollar los algoritmos propuestos, además del hardware correspondiente, se han utilizado las aplicaciones LabVIEW para funciones de adquisición de datos reales, y el software MATLAB® para el desarrollo de algoritmos y análisis de datos. La validación de resultados se ha realizado mediante los propios mensajes de posición ADS-B y a través de las trazas radar proporcionadas por la entidad pública empresarial ENAIRE. La técnica desarrollada es autónoma, y no ha requerido de ninguna otra entrada que no sea la recepción omnidireccional de las señales. Sin embargo para la validación de resultados se ha utilizado información pública de las ubicaciones de la red de estaciones SSR desplegadas sobre territorio español y portugués y trazas radar. Los resultados obtenidos demuestran, que con técnicas basadas en superficies de situación definidas por los tiempos de llegada de las respuestas, es posible determinar con una precisión aceptable la posición de las estaciones SSR y la posición de cualquier aeronave que responda mediante el Modo A a éstas. ABSTRACT Air transport is a strategic sector for the economic growth of any country. The air traffic management system (ATM) aims at the safe and efficient movement of aircraft while operating within the airspace and airports, where safety, in the tactical phase, is managed by the air traffic control services. Through the air traffic control processes, aircraft are monitored by sensors, regulated and guided in an organized and safe manner. It is precisely on surveillance where this thesis is focused, developing new concepts that provide a 'low cost' surveillance information based on existing signals provided by currently secondary radar infrastructure and satellite-based positioning systems used by ADS-B. Having a deeper knowledge and a real-time access to the trajectories of the aircraft, is an element of added value not only for the provision of air traffic control services, but also for all air transport or research actors. This is one of the key elements in the operational concept proposed by the two large scale existing technological projects, SESAR in Europe and NextGen in the US. In recent decades, air traffic control in medium and high traffic density areas has been based on complex technologies requiring major infrastructures, such as the primary surveillance radar (PSR) and secondary surveillance radar (SSR). The philosophy of SESAR and NextGen programs, both following the guidelines of ICAO, is to move away from land-based technologies and evolving into some new and more dynamic satellite-based technologies such as ADS-B. Nevertheless, until the ADS-B implementation and operation is fully achieved, there will be a transitional period where aircraft with and without ADS-B equipment will have to coexist. The main objective of this thesis is to determine those methodologies and algorithms which are considered more appropriate to hybridize those two technologies, by using a low cost omnidirectional receiver, which analyzes all signals on the SSR and ADS-B shared channel. Through this hybridization, it is possible to obtain the position of any aircraft answering the SSR interrogations, in any of its modes of operation, or through the emission of ADS-B messages. To develop the proposed algorithms, LabVIEW application has been used for real-time data acquisition, as well as MATLAB software for algorithm development and data analysis, together with the corresponding hardware. The validation of results was performed using the ADS-B position messages and radar tracks provided by the Public Corporate Entity ENAIRE The developed technique is autonomous, and it does not require any other input other than the omnidirectional signal reception. However, for the validation of results, not only radar records have been used, but also public information regarding the position of SSR stations spread throughout the Spanish and Portuguese territory. The results show that using techniques based in the definition of positioning surfaces defined by the responses’ times of arrival, it is possible to determine with an acceptable level of accuracy both the position of the SSR stations as well as the position of any aircraft which transmits Mode A responses.

Por causa do Reino dos Céus Uma leitura de gênero de Mateus 19,1-12 e 5,27-32

Há no Evangelho de Mateus material suficiente para se chegar ao discipulado de iguais porque seu conteúdo reflete uma prática igualitária de Jesus em relação às mulheres. Nesta tese tal prática pode ser verificada através da investigação de duas perícopes nas quais Jesus advoga a causa das mulheres discutindo o direito masculino do divórcio e o adultério: 19,1-12 e 5,27-32. No debate sobre a justa causa para se despedir a mulher, Jesus declara que a volta à criação original não mais concede tal prerrogativa aos homens. Essa discussão ocorre em terreno legal e isso se evidencia pelo termo aitia, cujo significado demonstra que na demanda do divórcio a lei concede ao homem o benefício de encontrar um motivo para acusação. Jesus, por sua vez, declara que pela sua lei todo motivo e acusação contra a mulher se transforma em motivo e acusação contra o próprio homem diante de Deus. O silêncio dos fariseus comprova que os argumentos de Jesus são irrefutáveis, mas o protesto dos seus discípulos revela que não lhes agrada a igualdade social entre os sexos. A resposta final e definitiva de Jesus encontra-se em Mt 19,10 onde pelo uso da metáfora eunuco ele encerra o debate dizendo que somente podem aceitar a sua causa os que abraçarem a causa do Reino dos Céus. Os temas divórcio e adultério permitem estender a discussão para o matrimônio que é a relação social e legal que fundamenta tais práticas, e buscar na Antigüidade as leis e costumes que regiam a vida sexual das mulheres naquele tempo, considerando os ambientes mais relevantes em relação ao mundo bíblico: o mundo greco-romano e o oriente próximo no período entre os séculos IV a.C. e IV d.C. para que, através da pesquisa sobre matrimônio, divórcio, adultério, dote, repúdio e outras sanções relativas à vida sexual das mulheres, se possa chegar aos mecanismos culturais da educação capazes de levar as mulheres à cumplicidade ou à resistência aos seus papéis sociais. Essa pesquisa se encerra com uma apreciação da história da renúncia sexual nos contextos judaico e cristão para projetar o ambiente e o horizonte sócio-religioso que foram palcos da recepção e transmissão de Mt 5,27-32 e Mt 19,1-12, de modo a demonstrar que os argumentos misóginos que se tornaram inerentes à interpretação desses textos são o resultado de uma mentalidade sexista que não corresponde à crítica literária do evangelho.(AU)

Por causa do Reino dos Céus Uma leitura de gênero de Mateus 19,1-12 e 5,27-32

Há no Evangelho de Mateus material suficiente para se chegar ao discipulado de iguais porque seu conteúdo reflete uma prática igualitária de Jesus em relação às mulheres. Nesta tese tal prática pode ser verificada através da investigação de duas perícopes nas quais Jesus advoga a causa das mulheres discutindo o direito masculino do divórcio e o adultério: 19,1-12 e 5,27-32. No debate sobre a justa causa para se despedir a mulher, Jesus declara que a volta à criação original não mais concede tal prerrogativa aos homens. Essa discussão ocorre em terreno legal e isso se evidencia pelo termo aitia, cujo significado demonstra que na demanda do divórcio a lei concede ao homem o benefício de encontrar um motivo para acusação. Jesus, por sua vez, declara que pela sua lei todo motivo e acusação contra a mulher se transforma em motivo e acusação contra o próprio homem diante de Deus. O silêncio dos fariseus comprova que os argumentos de Jesus são irrefutáveis, mas o protesto dos seus discípulos revela que não lhes agrada a igualdade social entre os sexos. A resposta final e definitiva de Jesus encontra-se em Mt 19,10 onde pelo uso da metáfora eunuco ele encerra o debate dizendo que somente podem aceitar a sua causa os que abraçarem a causa do Reino dos Céus. Os temas divórcio e adultério permitem estender a discussão para o matrimônio que é a relação social e legal que fundamenta tais práticas, e buscar na Antigüidade as leis e costumes que regiam a vida sexual das mulheres naquele tempo, considerando os ambientes mais relevantes em relação ao mundo bíblico: o mundo greco-romano e o oriente próximo no período entre os séculos IV a.C. e IV d.C. para que, através da pesquisa sobre matrimônio, divórcio, adultério, dote, repúdio e outras sanções relativas à vida sexual das mulheres, se possa chegar aos mecanismos culturais da educação capazes de levar as mulheres à cumplicidade ou à resistência aos seus papéis sociais. Essa pesquisa se encerra com uma apreciação da história da renúncia sexual nos contextos judaico e cristão para projetar o ambiente e o horizonte sócio-religioso que foram palcos da recepção e transmissão de Mt 5,27-32 e Mt 19,1-12, de modo a demonstrar que os argumentos misóginos que se tornaram inerentes à interpretação desses textos são o resultado de uma mentalidade sexista que não corresponde à crítica literária do evangelho.(AU)

The metabolic implications of intracellular circulation

Two views currently dominate research into cell function and regulation. Model I assumes that cell behavior is quite similar to that expected for a watery bag of enzymes and ligands. Model II assumes that three-dimensional order and structure constrain and determine metabolite behavior. A major problem in cell metabolism is determining why essentially all metabolite concentrations are remarkably stable (are homeostatic) over large changes in pathway fluxes—for convenience, this is termed the [s] stability paradox. For muscle cells, ATP and O2 are the most perfectly homeostatic, even though O2 delivery and metabolic rate correlate in a 1:1 fashion. In total, more than 60 metabolites are known to be remarkably homeostatic in differing metabolic states. Several explanations of [s] stability are usually given by traditional model I studies—none of which apply to all enzymes in a pathway, and all of which require diffusion as the means for changing enzyme–substrate encounter rates. In contrast, recent developments in our understanding of intracellular myosin, kinesin, and dyenin motors running on actin and tubulin tracks or cables supply a mechanistic basis for regulated intracellular circulation systems with cytoplasmic streaming rates varying over an approximately 80-fold range (from 1 to >80 μm × sec−1). These new studies raise a model II hypothesis of intracellular perfusion or convection as a primary means for bringing enzymes and substrates together under variable metabolic conditions. In this view, change in intracellular perfusion rates cause change in enzyme–substrate encounter rates and thus change in pathway fluxes with no requirement for large simultaneous changes in substrate concentrations. The ease with which this hypothesis explains the [s] stability paradox is one of its most compelling features.

Boston, Massachusetts, proposed subway route, 1895 (Raster Image)

This layer is a georeferenced raster image of the historic paper map entitled: Plan showing proposed route of subway, by the Boston Transit Commission. It was published by Geo. H. Walker & Co. in Feb. 1895. Scale [ca. 1:2,400]. The image inside the map neatline is georeferenced to the surface of the earth and fit to the Massachusetts State Plane Coordinate System, Mainland Zone (in Feet) (Fipszone 2001). All map collar and inset information is also available as part of the raster image, including any inset maps, profiles, statistical tables, directories, text, illustrations, or other information associated with the principal map. This map shows proposed subway route and stations from Causeway St. along Tremont St. to Boylston St., Boston, Massachusetts. It shows also features such as streets, station platforms, surface level and subterranean tracks, and more. This layer is part of a selection of digitally scanned and georeferenced historic maps of Massachusetts from the Harvard Map Collection. These maps typically portray both natural and manmade features. The selection represents a range of regions, originators, ground condition dates (1755-1922), scales, and purposes. The digitized selection includes maps of: the state, Massachusetts counties, town surveys, coastal features, real property, parks, cemeteries, railroads, roads, public works projects, etc.

Identity construction through phonetic crossing among young Capetonian gang members

Uncountable gangs operate in post-Apartheid South Africa, particularly in greater Cape Town, competing over turf and controlling the drug trade. Consequently, gang violence is rife in Western Cape and especially widespread in urban areas. In this paper young Capetonians’ narratives of gang violence are analyzed. In the narratives of attacks on Black or White South Africans by Coloured gang members, the Coloured narrators make use of their victims’ varieties of English, more precisely, of phonetic features. Hence, the aggressors do language crossing towards their targets when narrating their feats. Rampton (1995a:485) considers language crossing a ‘code alternation by people who are not accepted members of the group associated with the second language that they are using (code switching into varieties that are not generally thought to belong to them)’. This switching involves a transgression of social or ethnic boundaries that allows the young gangsters to construct, negotiate, uphold and manage their social identities, as language still functions as an utterly important identity marker in post-Apartheid South Africa.

Publication[s]

No more published; the commission, which was organized Oct. 26, 1909, for a five-year period, went out of existence Dec. 31, 1914, and its unfinished work was assumed by the International Health Commission, an organization created by the Rockefeller Foundation in 1913.

Por causa do Reino dos Céus Uma leitura de gênero de Mateus 19,1-12 e 5,27-32

Há no Evangelho de Mateus material suficiente para se chegar ao discipulado de iguais porque seu conteúdo reflete uma prática igualitária de Jesus em relação às mulheres. Nesta tese tal prática pode ser verificada através da investigação de duas perícopes nas quais Jesus advoga a causa das mulheres discutindo o direito masculino do divórcio e o adultério: 19,1-12 e 5,27-32. No debate sobre a justa causa para se despedir a mulher, Jesus declara que a volta à criação original não mais concede tal prerrogativa aos homens. Essa discussão ocorre em terreno legal e isso se evidencia pelo termo aitia, cujo significado demonstra que na demanda do divórcio a lei concede ao homem o benefício de encontrar um motivo para acusação. Jesus, por sua vez, declara que pela sua lei todo motivo e acusação contra a mulher se transforma em motivo e acusação contra o próprio homem diante de Deus. O silêncio dos fariseus comprova que os argumentos de Jesus são irrefutáveis, mas o protesto dos seus discípulos revela que não lhes agrada a igualdade social entre os sexos. A resposta final e definitiva de Jesus encontra-se em Mt 19,10 onde pelo uso da metáfora eunuco ele encerra o debate dizendo que somente podem aceitar a sua causa os que abraçarem a causa do Reino dos Céus. Os temas divórcio e adultério permitem estender a discussão para o matrimônio que é a relação social e legal que fundamenta tais práticas, e buscar na Antigüidade as leis e costumes que regiam a vida sexual das mulheres naquele tempo, considerando os ambientes mais relevantes em relação ao mundo bíblico: o mundo greco-romano e o oriente próximo no período entre os séculos IV a.C. e IV d.C. para que, através da pesquisa sobre matrimônio, divórcio, adultério, dote, repúdio e outras sanções relativas à vida sexual das mulheres, se possa chegar aos mecanismos culturais da educação capazes de levar as mulheres à cumplicidade ou à resistência aos seus papéis sociais. Essa pesquisa se encerra com uma apreciação da história da renúncia sexual nos contextos judaico e cristão para projetar o ambiente e o horizonte sócio-religioso que foram palcos da recepção e transmissão de Mt 5,27-32 e Mt 19,1-12, de modo a demonstrar que os argumentos misóginos que se tornaram inerentes à interpretação desses textos são o resultado de uma mentalidade sexista que não corresponde à crítica literária do evangelho.(AU)

Keynote Address by Karim Rashid

Karim Rashid is one of the most prolific designers of his generation. Over 3000 designs in production, over 300 awards and working in over 35 countries attest to Karim’s legend of design. Karim’s diversity affords him the ability to cross-pollinate ideas, materials, behaviors, aesthetics from one typology to the next, crossing boundaries and broadening consumer horizons. His award winning designs include democratic objects such as the ubiquitous Garbo waste can and Oh Chair for Umbra, interiors such as the Morimoto restaurant, Philadelphia and Semiramis hotel, Athens and exhibitions for LG Hausys and Audi. Karim has collaborated with clients to create democratic design for Method and Dirt Devil, furniture for Artemide and Magis, brand identity for Citibank and Hyundai, high tech products for LaCie and Samsung, and luxury goods for Veuve Clicquot and Swarovski, to name a few. Karim has recently been selected to design several real estate developments in New York City for HAP Investments, a New York City based International investment group. Karim’s work is featured in 20 permanent collections and he exhibits art in galleries world wide. Karim is a perennial winner of the Red Dot award, Chicago Athenaeum Good Design award, I.D. Magazine Annual Design Review, IDSA Industrial Design Excellence award. He holds honorary doctorates from the Ontario college of Art & Design and Corcoran College of Art & Design. 2011 highlighted Karim’s largest retrospective to date at the Triennale, in Milan, Italy. Karim is a frequent guest lecturer at universities and conferences globally disseminating the importance of design in everyday life. Karim has been featured in magazines including Time, Financial Times, NY Times, Esquire, GQ and countless more. His books include From the Beginning, Forma Edizioni (2014), Sketch, Frame (2012), a monograph of 300 drawings and computer renderings of selected works, KarimSpace, Rizzoli (2009), Design Your Self, Harper Collins (2006), Evolution, Rizzoli (2004) and I Want to Change the World, Universe (2001). In his spare time Karim’s pluralism flirts with art, fashion, and music and is determined to creatively touch every aspect of our physical and virtual landscape.

Benthic cyanobacterial mat (BCM) abundance on samples from the coast of Curacao

Benthic cyanobacterial mats (BCMs) are impacting coral reefs worldwide. However, the factors and mechanisms driving their proliferation are unclear. We conducted a multi-year survey around the Caribbean island of Curaçao, which revealed highest BCM abundance on sheltered reefs close to urbanised areas. Reefs with high BCM abundance were also characterised by high benthic cover of macroalgae and low cover of corals. Nutrient concentrations in the water-column were consistently low, but markedly increased just above substrata (both sandy and hard) covered with BCMs. This was true for sites with both high and low BCM coverage, suggesting that BCM growth is stimulated by a localised, substrate-linked release of nutrients from the microbial degradation of organic matter. This hypothesis was supported by a higher organic content in sediments on reefs with high BCM coverage, and by an in situ experiment which showed that BCMs grew within days on sediments enriched with organic matter (Spirulina). We propose that nutrient runoff from urbanised areas stimulates phototrophic blooms and enhances organic matter concentrations on the reef. This organic matter is transported by currents and settles on the seabed at sites with low hydrodynamics. Subsequently, nutrients released from the organic matter degradation fuel the growth of BCMs. Improved management of nutrients generated on land should lower organic loading of sediments and other benthos (e.g. turf and macroalgae) to reduce BCM proliferation on coral reefs.