Hasil untuk "Geography (General)"

C. Krebs, J. Myers

D. Prudham, J. G. Evans

G. Ebers, A. Sadovnick, N. Risch

Gearóid Ó. Tuathail, J. Agnew

Oscar Estrella, Hernan Luis Castillo Garcia, Fernando Javier Rengel Jimenez et al.

El presente trabajo de investigación refiere a la “Prospección geológica para calizas en el sector Zambi, ubicado en la parroquia Zambi, cantón Catamayo, provincia de Loja”, abarcando una extensión de 40 hectáreas consideradas como prioritarias y necesarias para la investigación, en la búsqueda inicial de zonas de acumulación de carbonatos de calcio, determinando sus propiedades tanto físicas como químicas que presentan estos depósitos y analizar su posible aplicación en actividades industriales. Una vez obtenida la información bibliográfica mediante trabajo de oficina, se realizó la primera visita al polígono de estudio, posterior a ello se desarrolló el levantamiento fotogramétrico por percepción remota a escala 1:1000, curvas principales cada 5 metros y curvas secundarias cada 1 metro, el mismo que se utilizó de base para realizar el levantamiento geológico a la misma escala, mediante descripción de afloramientos y calicatas en donde se evidenció tres tipos de litologías correspondientes a calizas, lutitas y cuarcitas. Una vez identificadas las rocas, se tomó muestras en diferentes puntos del área de estudio y se realizó ensayos físicos como el cálculo de peso específico, peso aparente y porosidad; ensayos químicos correspondientes a difracción de rayos X, fluorescencia de rayos X y pureza de carbonatos. Estos análisis determinaron el porcentaje de CaCo3 que existe en las calizas, siendo este compuesto el de mayor importancia con un valor promedio de 77,56% CaCo3 clasificándola como una caliza impura margosa; así mismo se identificó elementos como el AlO, SIO, PO, S, KO, CaO y FeO, los cuales según sus porcentajes de concentración en las muestras, permitieron conocer el uso industrial de las calizas con el cálculo del índice hidráulico, obteniendo como resultado que su aprovechamiento es para matriz de cemento portland. Se argumenta que esta roca está relacionada directamente con la industria cementera o industria de la construcción.

Valeria Giudici

This article examines how the territorial dimension is integrated into the activities of a corporate foundation for contemporary art. It focuses on the Pirelli HangarBicocca foundation, located in the post-industrial Bicocca district of Milan, exploring the theme of valorizing an industrial building that has been preserved from trivialization. After describing the cultural elements of the Bicocca landscape linked to the historical presence of the Pirelli company and examining the perception of the foundation's building by local actors, the article presents some examples of artistic interventions in the space of the cultural institution. These practices show how the interpretation of industrial spaces through the medium of art helps to strengthen the integration of the territorial dimension into the company's identity, while at the same time enhancing and bringing up to date the industrial landscape of the Milanese district. The analysis suggests that the foundation is more open and accessible thanks to its reflection on the territorial context, counteracting the elitist character generally associated with contemporary art and private institutions.

Yanyu Dai, Fan Lu, Benqing Ruan et al.

Quantitative differentiation of climate and human activities on runoff is important for water resources management and future water resources trend prediction. In recent years, runoff in the middle reaches of the Yellow River (MRYR) has decreased dramatically. Many studies have analyzed the causes of runoff reduction, but there is still a lack of understanding of the spatial differences in runoff contributions and their causes. Therefore, this study quantitatively distinguishes the contributions of climate and human activities to runoff changes in nine sub-basins of the MRYR based on the Budyko framework and analyses the differences in the contributions of different basins and their causes. The results show that the runoff in the nine sub-basins decreases significantly and the precipitation increases from northwest to southeast. The contribution of human activities to runoff is greater than that of climate change, especially in the Huangfuchuan (HF) River and Kuye (KY) River basins, where the contribution of human activities to runoff exceeds 90%. The greater impact of human activities in HF River and KY River is due to the significantly higher water use growth rate and normalized vegetation index trends than in other areas. HIGHLIGHTS Spatial differences in the causes of runoff variation in nine small watersheds in the middle reaches of the Yellow River were analyzed.; The influence of NDVI and human water extraction cannot be ignored.;

M. Jha, A. Chowdhury, V. Chowdary et al.

Mona Fairuz Ramli, Ahmad Shabudin Ariffin, Marziah Zahar et al.

Mangrove forests are special type of coastal ecosystem characterized by their adaptations that enable plants to thrive in saline soil. Despite accounting for only about 1% of global forest coverage, mangroves are keystone ecosystems that provide a variety of critical ecological processes and environmental services. In recent years, there has been a considerable increase in interest in mangrove biodiversity. The lack of community-based organizations (CBO) on the awareness of conservation has a direct negative impact on endangered species. The aim of this is to analyze the conservation and preservation for mangrove in north coast area of Malaysia. Qualitative method was used to collect and analyzed the data, and supported with observations. The findings showed that mangrove conservation project in Kilim and Acheh River rivers are participated by the different stakeholders such as local government units (LGU), NGOs (PiFWA and Koperasi Komuniti Kampung Kilim Langkawi Berhad and Koperasi Nelayan Sungai Kubang Badak Langkawi Berhad), as well as a local community composed of fishermen, gleaners and business operator (travel agent). Those stakeholders are playing different role depend on their capacities. This study proves that mangrove forests are important for coastal area in Malaysia, and conservation efforts are needed to protect it. This finding also can be applied in other area. The contribution and participation of all parties also need for any conservation activities. The funding is crucial for supporting the sustainability of conservation program because some parts of conservation need it to be built such infrastructure or material for conservation.

R. Myers

Allison Larg, J. Moss

C. Mobley, Wade M. Vagias, Sarah L. DeWard

G. Macleod

Jin Zhu, Dayu Cheng, Weiwei Zhang et al.

People spend more than 80% of their time in indoor spaces, such as shopping malls and office buildings. Indoor trajectories collected by indoor positioning devices, such as WiFi and Bluetooth devices, can reflect human movement behaviors in indoor spaces. Insightful indoor movement patterns can be discovered from indoor trajectories using various clustering methods. These methods are based on a measure that reflects the degree of similarity between indoor trajectories. Researchers have proposed many trajectory similarity measures. However, existing trajectory similarity measures ignore the indoor movement constraints imposed by the indoor space and the characteristics of indoor positioning sensors, which leads to an inaccurate measure of indoor trajectory similarity. Additionally, most of these works focus on the spatial and temporal dimensions of trajectories and pay less attention to indoor semantic information. Integrating indoor semantic information such as the indoor point of interest into the indoor trajectory similarity measurement is beneficial to discovering pedestrians having similar intentions. In this paper, we propose an accurate and reasonable indoor trajectory similarity measure called the indoor semantic trajectory similarity measure (ISTSM), which considers the features of indoor trajectories and indoor semantic information simultaneously. The ISTSM is modified from the edit distance that is a measure of the distance between string sequences. The key component of the ISTSM is an indoor navigation graph that is transformed from an indoor floor plan representing the indoor space for computing accurate indoor walking distances. The indoor walking distances and indoor semantic information are fused into the edit distance seamlessly. The ISTSM is evaluated using a synthetic dataset and real dataset for a shopping mall. The experiment with the synthetic dataset reveals that the ISTSM is more accurate and reasonable than three other popular trajectory similarities, namely the longest common subsequence (LCSS), edit distance on real sequence (EDR), and the multidimensional similarity measure (MSM). The case study of a shopping mall shows that the ISTSM effectively reveals customer movement patterns of indoor customers.

Chengming Li, Zheng Wu, Lining Zhu et al.

The COVID-19 pandemic is a major problem facing humanity throughout the world. The rapid and accurate tracking of population flows may therefore be epidemiologically informative. This paper adopts a massive amount of daily population flow data (from January 10 to March 15, 2020) for China obtained from the Baidu Migration platform to analyze the changes of the spatiotemporal patterns and network characteristics in population flow during the pre-outbreak period, outbreak period, and post-peak period. The results show that (1) for temporal characteristics of population flow, the total population flow varies greatly between the three periods, with an overall trend of the pre-outbreak period flow > the post-peak period flow > the outbreak period flow. Impacted by the lockdown measures, the population flow in various provinces plunged drastically and remained low until the post-peak period, at which time it gradually increased. (2) For the spatial pattern, the pattern of population flow is divided by the geographic demarcation line known as the Hu (Heihe-Tengchong) Line, with a high-density interconnected network in the southeast half and a low-density serial-connection network in the northwest half. During the outbreak period, Wuhan city appeared as a hollow region in the population flow network; during the post-peak period, the population flow increased gradually, but it was mainly focused on intra-provincial flow. (3) For the network characteristic changes, during the outbreak period, the gap in the network status between cities at different administrative levels narrowed significantly. Thus, the feasibility of Baidu migration data, comparison with non-epidemic periods, and optimal implications are discussed. This paper mainly described the difference and specific information under non-normal situation compared with existing results under a normal situation, and analyzed the impact mechanism, which can provide a reference for local governments to make policy recommendations for economic recovery in the future under the epidemic period.

Fabio Amato

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K. Armstrong, Karima L Ravenell, S. McMurphy et al.

M. Damiani, E. Bertino, B. Catania et al.

M. Cardillo, G. Mace, J. L. Gittleman et al.

V. Masson‐Delmotte, S. Hou, A. Ekaykin et al.