915 resultados para Tourism and clusters
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Programa de Doctorado: Fuentes, Métodos e Historiografía para la Investigación en el Mundo Atlántico
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[EN] Playa Barca is a 370 m long beach located within the system of the Leeward beaches on the Jandía peninsula, Fuerteventura. This system of beaches represents one of the major sources of economic income to the island, both because of its natural landscape that attract a specific type of tourism, and because of its particular climate conditions that make these beaches ideal for practicing wind-water sports. Nevertheless, in the past decades, this area has suffered from a significant and worrying coastline retreat. In order to look for an explanation to this retreat, five topographic surveys were carried out in October 1999, February 2001, February 2002, February 2003 and February 2013 to track the beach behavior in the last 15 years. A total station Topcon GTS-303D was used for this purpose. Surveys were carried out during low spring tides, so that the outer limit was the furthest possible depending on wave conditions. The inner limit covered part of the dunes in the backshore. From these topographic data both coastline changes and the sedimentary balance have been obtained.
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[ES] Se propone una metodología para la valoración de las relaciones entre la ciudad, el turismo y la planificación del territorio desde la perspectiva del paisaje y el medio ambiente. Para ello, analizamos como las estrategias de mejora de la competitividad turística de las ciudades tienen su traslación en la planificación urbanística de los ayuntamientos y la relación o integración de los elementos que configuran ambientalmente el espacio urbano. Con este objeto genérico, se selecciona el ejemplo de Las Palmas de Gran Canaria como laboratorio de experiencias de ordenación del espacio, mediante las cuales puede observarse los indicadores y dificultades en el tratamiento de la calidad ambiental. Nos interesa distinguir cómo estos elementos ambientales se planifican como recursos turísticos y la relevancia que tienen en las estrategias públicas de la ordenación del territorio.
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La ricerca si pone come obbiettivo principale quello di individuare gli strumenti in grado di controllare la qualità di una progettazione specifica che risponde alle forti richieste della domanda turistica di un territorio. Parte dalle più semplici teorie che inquadrano una costante condizione dell’uomo, “il VIAGGIARE”. La ricerca si pone come primo interrogativo quello definire una “dimensione” in cui le persone viaggiano, dove il concetto fisico di spazio dedicato alla vita si è spostato come e quanto si sposta la gente. Esiste una sorta di macroluogo (destinazione) che comprende tutti gli spazi dove la gente arriva e da cui spesso riparte. Pensare all'architettura dell’ospitalità significa indagare e comprendere come la casa non è più il solo luogo dove la gente abita. La ricerca affonda le proprie tesi sull’importanza dei “luoghi” appartenenti ad un territorio e come essi debbano riappropriarsi, attraverso un percorso progettuale, della loro più stretta vocazione attrattiva. Così come si sviluppa un’architettura dello stare, si manifesta un’architettura dello spostarsi e tali architetture si confondono e si integrano ad un territorio che per sua natura è esso stesso attrattivo. L’origine terminologica di nomadismo è passaggio necessario per la comprensione di una nuova dimensione architettonica legata a concetti quali mobilità e abitare. Si indaga pertanto all’interno della letteratura “diasporica”, in cui compaiono le prime configurazioni legate alla provvisorietà e alle costruzioni “erranti”. In sintesi, dopo aver posizionato e classificato il fenomeno turistico come nuova forma dell’abitare, senza il quale non si potrebbe svolgere una completa programmazione territoriale in quanto fenomeno oramai imprescindibile, la ricerca procede con l’individuazione di un ambito inteso come strumento di indagine sulle relazioni tra le diverse categorie e “tipologie” turistiche. La Riviera Romagnola è sicuramente molto famosa per la sua ospitalità e per le imponenti infrastrutture turistiche ma a livello industriale non è meno famosa per il porto di Ravenna che costituisce un punto di riferimento logistico per lo scambio di merci e materie prime via mare, oltre che essere, in tutta la sua estensione, caso di eccellenza. La provincia di Ravenna mette insieme tutti i fattori che servono a soddisfare le Total Leisure Experience, cioè esperienze di totale appagamento durante la vacanza. Quello che emerge dalle considerazioni svolte sul territorio ravennate è che il turista moderno non va più in cerca di una vacanza monotematica, in cui stare solo in spiaggia o occuparsi esclusivamente di monumenti e cultura. La richiesta è quella di un piacere procurato da una molteplicità di elementi. Pensiamo ad un distretto turistico dove l’offerta, oltre alla spiaggia o gli itinerari culturali, è anche occasione per fare sport o fitness, per rilassarsi in luoghi sereni, per gustare o acquistare cibi tipici e, allo stesso tempo, godere degli stessi servizi che una persona può avere a disposizione nella propria casa. Il percorso, finalizzato a definire un metodo di progettazione dell’ospitalità, parte dalla acquisizione delle esperienze nazionali ed internazionali avvenute negli ultimi dieci anni. La suddetta fase di ricerca “tipologica” si è conclusa in una valutazione critica che mette in evidenza punti di forza e punti di debolezza delle esperienze prese in esame. La conclusione di questa esplorazione ha prodotto una prima stesura degli “obbiettivi concettuali” legati alla elaborazione di un modello architettonico. Il progetto di ricerca in oggetto converge sul percorso tracciato dai Fiumi Uniti in Ravenna. Tale scelta consente di prendere in considerazione un parametro che mostri fattori di continuità tra costa e città, tra turismo balneare e turismo culturale, considerato quindi come potenziale strumento di connessione tra realtà spesso omologhe o complementari, in vista di una implementazione turistica che il progetto di ricerca ha come primo tra i suoi obiettivi. Il tema dell’architettura dell’ospitalità, che in questo caso si concretizza nell’idea di sperimentare l’ALBERGO DIFFUSO, è quello che permette di evidenziare al meglio la forma specifica della cultura locale, salvandone la vocazione universale. La proposta progettuale si articola in uno studio consequenziale ed organico in grado di promuovere una riflessione originale sul tema del modulo “abitativo” nei luoghi di prossimità delle emergenze territoriali di specifico interesse, attorno alle quali la crescente affluenza di un’utenza fortemente differenziata evidenzia la necessità di nodi singolari che si prestino a soddisfare una molteplicità di usi in contesti di grande pregio.
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Rationale: Coralligenous habitat is considered the second most important subtidal “hot spot” of species diversity in the Mediterranean Sea after the Posidonia oceanica meadows. It can be defined as a typical Mediterranean biogenic hard bottom, mainly produced by the accumulation of calcareous encrusting algae that, together with other builder organisms, form a multidimensional framework with a high micro-spatial variability. The development of this habitat depends on physical factors (i.e. light, hydrodynamism, nutrients, etc.), but also biologic interactions can play a relevant role in structuring the benthic assemblages. This great environmental heterogeneity allows several different assemblages to coexist in a reduced space. One of the most beautiful is that characterised by the Mediterranean gorgonian Paramuricea clavata (Risso, 1826) that can contribute to above 40% of total biomass of the community and brings significant structural complexity into the coralligenous habitat. In sites moderately exposed to waves and currents, P. clavata can form high-density populations (up to 60 colonies m-2) between 20 – 70 m in depth. Being a suspension feeder, where it forms dense populations, P. clavata plays a significant role in transferring energy from planktonic to benthic system. The effects of the branched colonies of P. clavata could be comparable to those of the forests on land. They can affect the micro scale hydrodynamism and light, promoting or inhibiting the growth of other species. Unfortunately, gorgonians are threatened by several anthropogenic disturbance factors (i.e. fishing, pollution, tourism) and by climatic anomalies, linked to the global changes, that are responsible of thermal stress, development of mucilage and enhanced pathogens activity, leading to mass mortality events in last decades. Till now, the possible effects of gorgonian forest loss are largely unknown. Our goal was to analyse the ecological role of these sea fan forests on the coralligenous benthic assemblages. Experimental setup and main results: The influence of P. clavata in the settlement and recruitment of epibenthic organisms was analysed by a field experiment carried out in two randomly selected places: Tavolara island and Portofino promontory. The experiment consisted in recreate the presence and absence of the gorgonian forest on recruitment panels, arranged in four plots per type (forested and non-forested), interspersed each other, and deployed at the same depth. On every forested panel 3 gorgonian colonies about 20 cm height were grafted with the use of Eppendorf tubes and epoxy resin bicomponent simulating a density of 190 sea fans per m-2. This density corresponds to a mean biomass of 825 g DW m-2,3 which is of the same order of magnitude of the natural high-density populations. After about 4 months, the panels were collected and analysed in laboratory in order to estimate the percent cover of all the species that have colonized the substrata. The gorgonian forest effects were tested by multivariate and univariate permutational analyses of the variance (PERMANOVA). Recruited assemblages largely differed between the two study sites, probably due to different environmental conditions including water quality and turbidity. On overall, the presence of P. clavata reduced the settlement and recruitment of several algae: the shadow caused by the gorgonian might reduce light availability and therefore their growth. This effect might be greater in places where the waters are on average more clear, since at Portofino it is less visible and could be masked by the high turbidity of the water. The same pattern was registered for forams, more abundant outside gorgonian forest, probably linked with algal distribution, shadowing effect or alimentary competition. The last one hypothesis could be valid also for serpulids polychaetes that growth mainly on non-forested panels. An opposite trend, was showed by a species of bryozoan and by an hydroid that is facilitated by the presence of P. clavata, probably because it attenuates irradiance level and hydrodynamism. Species diversity was significantly reduced by the presence of P. clavata forests at both sites. This seems in contrast with what we expected, but the result may be influenced by the large algal component on non-forested panels. The analysis confirmed the presence of differences in the species diversity among plots and between sites respectively due to natural high variability of the coralligenous system and to different local environment conditions. The reduction of species diversity due to the presence of gorgonians appeared related to a worst evenness rather than to less species richness. With our experiment it is demonstrated that the presence of P. clavata forests can significantly alter local coralligenous assemblages patterns, promoting or inhibiting the recruitment of some species, modifying trophic relationships and adding heterogeneity and complexity to the habitat. Moreover, P. clavata could have a stabilising effect on the coralligenous assemblages.
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The purpose of this work is to provide a methodological tool for literature searching in geography, tourism and environmental conservation. Knowledge of bibliographic and documentary resources and learning research strategies form an essential part of training for students and researchers. Literature searching is also a critical element of communication and scientific output. This work aims to analyze the characteristics, and critical issues in geography literature searching in order to provide a critical mass of useful information to correctly prepare a search. Having addressed the issue of information literacy for the study of geography and related disciplines, including a comparison of various approaches, this work describes the physical locations of the research: libraries and archives. It outlines the issues related to the cataloging and digitization of cartographic materials. The particular characteristics of scientific communication and its primary means of dissemination, the scientific journal, are then outlined. This is followed by a description of information sources and types of documents used within the realm of geography. Tools, strategies and resources are then illustrated for conducting an effective literature search both on the web and in the library.
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A fundamental gap in the current understanding of collapsed structures in the universe concerns the thermodynamical evolution of the ordinary, baryonic component. Unopposed radiative cooling of plasma would lead to the cooling catastrophe, a massive inflow of condensing gas toward the centre of galaxies, groups and clusters. The last generation of multiwavelength observations has radically changed our view on baryons, suggesting that the heating linked to the active galactic nucleus (AGN) may be the balancing counterpart of cooling. In this Thesis, I investigate the engine of the heating regulated by the central black hole. I argue that the mechanical feedback, based on massive subrelativistic outflows, is the key to solving the cooling flow problem, i.e. dramatically quenching the cooling rates for several billion years without destroying the cool-core structure. Using an upgraded version of the parallel 3D hydrodynamic code FLASH, I show that anisotropic AGN outflows can further reproduce fundamental observed features, such as buoyant bubbles, cocoon shocks, sonic ripples, metals dredge-up, and subsonic turbulence. The latter is an essential ingredient to drive nonlinear thermal instabilities, which cause cold gas condensation, a residual of the quenched cooling flow and, later, fuel for the AGN feedback engine. The self-regulated outflows are systematically tested on the scales of massive clusters, groups and isolated elliptical galaxies: in lighter less bound objects the feedback needs to be gentler and less efficient, in order to avoid drastic overheating. In this Thesis, I describe in depth the complex hydrodynamics, involving the coupling of the feedback energy to that of the surrounding hot medium. Finally, I present the merits and flaws of all the proposed models, with a critical eye toward observational concordance.
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Il presente lavoro intende analizzare il tema del turista lento che nell’ultimo decennio si è diffuso nel dibattito scientifico e culturale connesso al tema della sostenibilità e della qualità della vita e nel contesto dell’approccio teorico strutturato intorno alle nuove tendenze dello Slow Tourism. In una prima parte la tesi delinea il framework della sostenibilità con particolare attenzione al recente dibattito in corso sulla “decrescita” e l’“a-crescita” come concetti alternativi al paradigma della crescita. Successivamente viene evidenziato il modo in cui le idee di base ed i principi dello sviluppo sostenibile sono stati applicati al turismo e indagato il legame tra sostenibilità e responsabilità e come questo configura l’emergere di un turismo “responsustable”. In tale contesto viene analizzata la relazione tra turismo e lentezza in cui a filosofia slow non deve essere interpretata come un fenomeno del momento o un innovativo prodotto turistico, ma come una filosofia di vita, un movimento sociale e globale che negli ultimi anni ha caratterizzato i diversi ambiti socio-economici delle comunità locali. Successivamente attraverso una review della letteratura nazionale ed internazionale sul tema, la pluralità di prospettive teoriche vengono sistematizzate in tre ipotesi di lettura riconducibili a tre paradigmi: sostenibilità- slow tourism- territorio; benessere – slow tourism – qualità della vita; esperienza – slow tourism – consumo. Nella seconda parte del lavoro viene presentata l’indagine empirica a partire dall’analisi di contesto del territorio in cui si è svolta l’attività di ricerca, i nove comuni del Comprensorio Turistico della Valnerina in Umbria, con particolare riferimento all’analisi dell’offerta e della domanda turistica. Successivamente sono presentati i risultati di un questionario somministrato a 620 turisti attraverso il quale viene analizzato il profilo motivazionale, le esperienze di fruizione turistica e la percezione della qualità territoriale da parte del turista e delineato il profilo del turista slow in Valnerina.
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Large-scale structures can be considered an interesting and useful "laboratory" to better investigate the Universe; in particular the filaments connecting clusters and superclusters of galaxies can be a powerful tool for this intent, since they are not virialised systems yet. The large structures in the Universe have been studied in different bands, in particular the present work takes into consideration the emission in the radio band. In the last years both compact and diffuse radio emission have been detected, revealing to be associated to single objects and clusters of galaxies respectively. The detection of these sources is important, because the radiation process is the synchrotron emission, which in turn is linked to the presence of a magnetic field: therefore studying these radio sources can help in investigating the magnetic field which permeates different portions of space. Furthermore, radio emission in optical filaments have been detected recently, opening new chances to further improve the understanding of structure formation. Filaments can be seen as the net which links clusters and superclusters. This work was made with the aim of investigating non-thermal properties in low-density regions, looking for possible filaments associated to the diffuse emission. The analysed sources are 0917+75, which is located at a redshift z = 0.125, and the double cluster system A399-A401, positioned at z = 0.071806 and z = 0.073664 respectively. Data were taken from VLA/JVLA observations, and reduced and calibrated with the package AIPS, following the standard procedure. Isocountour and polarisation maps were yielded, allowing to derive the main physical properties. Unfortunately, because of a low quality data for A399-A401, it was not possible to see any radio halo or bridge.
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Der Tauchtourismus übernimmt innerhalb des gesamten internationalen Tourismus in Ägypten eine wichtige Rolle. Besonders in Krisenzeiten sind es die Taucher, die aufgrund der einzigartigen Tauchgebiete weiterhin in das Land kommen und somit einen wesentlichen Beitrag zum Erhalt der Arbeitsplätze und der Infrastruktur beitragen. Doch der Konkurrenzkampf zwischen den Tauchbasen, das derzeit schlechte Image Ägyptens und die Attraktivität weltweiter Tauchdestinationen, zwingt die Betreiber von Tauchbasen dazu, sich einer wandelnden Gästestruktur und deren Reisegewohnheiten anzupassen. In der vorliegenden Untersuchung wird am Beispiel der Tauchbasenbetreiber in Ägypten untersucht, wie kulturelles Handeln eine Rolle bei der Bildung von Vertrauen zwischen einem Anbieter einer touristischen Dienstleistung und dem Kunden einnehmen kann. Als Ausgangspunkt dient dazu das Modell der „Transkulturalität als Praxis“ nach PÜTZ (2004), welches um den Aspekt der internationalen Kooperationsbeziehungen erweitert wird. Es besagt, dass im wirtschaftlichen Handeln zwischen den Akteuren das kulturelle Verständnis eine entscheidende Rolle bei der Bildung von Vertrauen einnimmt. Durch die Fähigkeit, einen kulturellen Blickwinkel in das alltägliche Handeln einzubeziehen, kann ein Unternehmer den Wettbewerbsvorsprung zu seinen Mitkonkurrenten ausbauen.rnrnIm Mittelpunkt des Forschungsinteresses stand dabei die Frage inwieweit die Basenbetreiber über die ihnen zur Verfügung stehenden Möglichkeiten kulturgebundenen Handelns Vertrauen zu den Tauchern generieren. Geschieht die Anwendung aus eigener Initiative heraus oder nur unter dem Konkurrenzdruck? Die Ergebnisse der Studie belegen, dass das Arbeiten im Umfeld kultureller Unterschiede den Blick der Basenbetreiber für die Notwendigkeit einer starken Vertrauensbeziehung zum Kunden von Anfang an geprägt hat. Das Handeln aller Interviewteilnehmer orientiert sich zuerst unbewusst an zahlreichen branchenüblichen Handlungsweisen und Symbolen, stößt aber ab einem bestimmten Punkt an seine Grenzen. Aufgrund von bewusstem kulturellen Handeln ist jedoch die Möglichkeit gegeben, diese Grenzen zu überwinden und individuelle und situationsspezifische Arten der Kundengewinnung in das Handeln einzubeziehen.
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This commentary is a discussion of the article "Human Trafficking, Sex Tourism, and Child Exploitation on the Southern Border." Most importantly, it is a comment on the lack of attention given to American children prostituted in our own backyards. All forms of sex trafficking are deplorable but the plight of the American child victim creates unique challenges for prosecutors, law enforcement and non-governmental agencies working hard to bring the crimes involved with domestic minor sex trafficking to the forefront. To that end, this commentary attempts to provide resources and guidance.
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Temerin is settlements in the municipality of the same name, and њhose is center. This settlement by its characteristics is a very specific for area of Bačke and Vojvodina. One of its main characteristic is a specific spatial and urban development. Although the site of the present Temerin revealed several archaeological sites that attest to the presence of humans in prehistoric times, today’s settlement, under this name, is mentioned first time in the early 14th century. Over the centuries the Temerin developed and expanded in phases, forming elements of the composition of settlements with a number of specific features. Especially in this regard emphasize shape, structure and physiognomy of the settlement. The main characteristic of the physiognomy of the settlement is a large elongated north to south axis of Temerin, which is the main street, and also the longest street in the whole of Serbia (13 km). Along the major axis, and in some places there are strains in relation to linear the square in the form of parts as a result of subsequent colonization and phase expansion of Temerin. This paper aims to study the expansion and urban development Temerin throughout history.
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Background. Pulsed-field gel electrophoresis (PFGE) is a laboratory technique in which Salmonella DNA banding patterns are used as molecular fingerprints for epidemiologic study for "PFGE clusters". State and national health departments (CDC) use PFGE to detect clusters of related cases and to discover common sources of bacteria in outbreaks. ^ Objectives. Using Houston Department of Health and Human Services (HDHHS) data, the study sought: (1) to describe the epidemiology of Salmonella in Houston, with PFGE subtype as a variable; and (2) to determine whether PFGE patterns and clusters detected in Houston were local appearances of PFGE patterns or clusters that occurred statewide. ^ Methods. During the years 2002 to 2005, the HDHHS collected and analyzed data from routine surveillance of Salmonella. We implemented a protocol, between May 1, 2007 and December 31, 2007, in which PFGE patterns from local cases were sent via e-mail to the Texas Department of State Health Services, to verify whether the local PFGE patterns were also part of statewide clusters. PFGE was performed from 106 patients providing a sample from which Salmonella was isolated in that time period. Local PFGE clusters were investigated, with the enhanced picture obtained by linking local PFGE patterns to PFGE patterns at the state and national level. ^ Results. We found that, during the years 2002 to 2005, there were 66 PFGE clusters, ranging in size from 2 to 22 patients within each cluster. Between different serotypes, there were marked differences in the sizes of PFGE clusters. A common source or risk factor was found in fewer than 5 of the 66 PFGE clusters. With the revised protocol, we found that 19 of 66 local PFGE patterns were indistinguishable from PFGE patterns at Texas DSHS. During the eight months, we identified ten local PFGE clusters with a total of 42 patients. The PFGE pattern for eight of the ten clusters matched the PFGE patterns for cases reported to Texas DSHS from other geographic areas. Five of the ten PFGE patterns matched PFGE patterns for clusters under investigation at PulseNet at the national level. HDHHS epidemiologists identified a mode of transmission in two of the ten local clusters and a common risk factor in a third local cluster. ^ Conclusion. In the extended-study protocol, Houston PFGE patterns were linked to patterns seen at the state and national level. The investigation of PFGE clusters was more efficacious in detecting a common transmission when local data were linked to state and national data. ^
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Planococcus ficus Signoret es un insecto perteneciente al orden Hemiptera, familia Pseudococcidae, cuya población ha aumentado en los últimos años en Mendoza. Ataca gran variedad de hospederos y está distribuido en las principales zonas vitícolas del mundo. Su acción disminuye el vigor general de las plantas, perjudica la calidad de los frutos y las características organolépticas de los vinos elaborados con racimos infestados. El objetivo de este trabajo fue realizar estudios bioecológicos durante la temporada 2004-2005, analizando la forma de pasaje invernal y el número de generaciones anuales. Se marcaron y muestrearon plantas con los signos característicos del ataque. Se recolectó quincenalmente material vegetal infestado. En invierno: trozos de corteza. En primavera-verano: brotes, hojas y racimos. Los resultados indicaron que pasa el invierno principalmente como huevos agrupados en masas algodonosas, bajo la corteza. Se distinguieron seis generaciones, movilizándose conforme al aumento de las temperaturas hacia los brotes y hojas y, a partir de la tercera generación, a los racimos, permaneciendo en todas las partes aéreas de la planta el resto de la temporada hasta la caída de hojas. Con la disminución de las temperaturas retornó hacia la corteza del tronco para invernar.
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A fines de la década de los noventa se inicia en Mendoza la construcción de la presa Potrerillos, obra hidroeléctrica que tiene el propósito de regular las aguas del río Mendoza, del cual depende el riego y la vida de gran parte del oasis Norte de la provincia. En la serie de beneficios que se esperan de esta obra no figura la población local, que es la directamente afectada. Los resultados obtenidos permiten descubrir aspectos de la realidad y del estilo de vida de Potrerillos hasta el momento desconocidos y que hacen predecir el fuerte impacto socioeconómico que tendrá esta obra, al tener que trasladar población y al constituirse en un polo de atracción para grandes contingentes de turistas ocasionales que buscan aprovechar el espejo de agua o disfrutar del medio natural. El diagnóstico obtenido permite descubrir las alteraciones socioeconómicas a producirse debido a la relocalización de familias, cuyos lotes y viviendas quedarán bajo el agua, aspectos que no se tienen en cuenta en la evaluación de impacto ambiental, en donde se pone el acento en aquellos impactos que pueden llegar a alterar el ecosistema local y regional, pero no en los efectos que ocasionará en la calidad de vida de los lugareños.