scholarly journals Groundwater – Geothermal preliminary model of the Acque Albule Basin (Rome): future perspectives of geothermal resources exploitation

2013 ◽  
Author(s):  
Francesco La Vigna ◽  
Angela Gnoni
Keyword(s):  
Central Area ◽  
Point Of View ◽  
Future Perspectives ◽  
Geothermal Resources ◽  
Extraction Area ◽  
Preliminary Model ◽  
Geothermal Model ◽  
Roman Age ◽  
Resources Exploitation ◽  
Travertine Deposit

This work presents the preliminary results of a groundwater and geothermal model applied to the hydrothermal system of the Tivoli- Guidonia plain, located in the east surroundings of Rome. This area, which is characterized by a thick outcropping travertine deposit, has been an important quarry extraction area since roman age. Today the extraction is in deepening helped by a large dewatering action. By an hydrogeological point of view, the travertine aquifer of the Tivoli- Guidonia Plain, is recharged by lateral discharge in the Lucretili and Cornicolani Mts., and by piping trough important regional faults, located in the basal aquiclude, in the central area of the basin. Piping hydrothermal groundwater is the main contribution on flow in the basin. Preliminary simulations of the groundwater-geothermal model, reproduce quite well the heat and mineralization plumes of groundwater observed in the travertine aquifer.

scholarly journals A Structural-Thermal Model of the Karkonosze Pluton (Sudetes Mountains, SW Poland) for Hot Dry Rock (HDR) Geothermal Use

2016 ◽  
Vol 61 (4) ◽  
pp. 917-935 ◽  
Author(s):  
Wiesław Bujakowski ◽  
Antoni Barbacki ◽  
Maciej Miecznik ◽  
Leszek Pająk ◽  
Robert Skrzypczak
Keyword(s):  
Central Area ◽  
Tectonic Activity ◽  
Fluid Migration ◽  
Geothermal Resources ◽  
Radiogenic Heat ◽  
Cycle System ◽  
The Earth ◽  
Binary Cycle ◽  
Sw Poland ◽  
Insight Into

Abstract The main objective of this study was to develop a spatial temperature distribution of the Karkonosze Pluton to indicate optimum locations for HDR systems at drillable depth. HDR geothermal technology makes it possible to extract heat from the Earth in areas where no hydro-geothermal resources are present. To produce electricity in a binary cycle, system temperatures of > 100°C are usually required. In this paper, the authors have analysed the potential opportunities for applying HDR technology in the area of the Karkonosze Pluton, which is regarded as an optimum location for the application of the HDR concept (due to the potential for stimulation offered by the mechanical properties of the granites, radiogenic heat production, modern tectonic activity, and the thickness of the pluton). The model used in the analysis, which takes into account a hypothetical assessment of the manner and paths of fluid migration within the pluton, provides an insight into the spatial distribution of subsurface temperatures. It thus allows the location of relatively shallow high-temperature zones, which are optimal for the efficient application of HDR technology, to be identified. With respect to this technology, the Szklarska Poręba area and the NE part of the pluton seem to be better targets than the Cieplice central area, where the model indicated much lower temperatures (e.g. at a depth of 5,000 m, estimated temperatures in the vicinity of Szklarska Poręba were about 185°C and in the vicinity of Cieplice they were about 140°C).

NEUTRINO PHYSICS: A STATUS REPORT

2011 ◽  
Vol 26 (29) ◽  
pp. 4901-4927 ◽  
Author(s):  
RICCARDO BRUGNERA
Keyword(s):  
Neutrino Physics ◽  
Neutrino Oscillations ◽  
Point Of View ◽  
Status Report ◽  
Future Perspectives ◽  
The Future ◽  
The Status

In this paper we summarize the status of neutrino oscillations and neutrino direct mass searches from an experimentalist point of view. Emphasis is posed in the latest results and in the future perspectives.

On The Historical Origin of Basque Accentuation

Diachronica ◽  
1993 ◽  
Vol 10 (1) ◽  
pp. 13-50 ◽  
Author(s):  
José Ignacio Hualde
Keyword(s):  
Central Area ◽  
Point Of View ◽  
Large Numbers ◽  
Historical Origin

SUMMARY From a diachronic point of view, the study of Basque accentuation presents the problem of accounting for the very different accentual systems that are found nowadays within the Basque-speaking territory. Whereas in a large central area there is no contrastive word accent, systems with phonologically distinctive accentuation are found both in eastern and western regions. The accentual systems of some western varieties are especially complex and are shown to rely on an opposition between accented or preaccenting and unaccented morphemes. In this paper, it is argued that all present-day accentual systems can be derived from an earlier common stage lacking contrastive accentuation and, in particular, that the western system arose as a result of a rule of compound accentuation; contrastive accent being reinforced by the adoption of large numbers of Latin and Romance loanwords with their original accentual pattern. RÉSUMÉ Du point de vue diachronique, l'étude de l'accent de la langue basque a pour objet de rendre compte de la diversité des systèmes actuels existant aujourd'hui au pays basque. Alors que dans la plus grande partie de ce dernier il n'y a pas d'accent contrastif, les parler occidentaux et orientaux offrent des systèmes où l'accent de mot est phonologiquement distinctif. Particulièrement complexes, les systèmes accentuels de certains parlers occidentaux se fondent sur une distinction entre morphèmes accentués ou préaccentuants et morphèmes inaccentués. On soutient que tous les systèmes accentuels du basque peuvent venir d'un état commun antérieur sans accent contrastif, et que le système occidental en particulier résulte de l'accentuation des composés, renforcée par l'adoption d'une grande quantité d'emprunts latins et romans avec leur accentuation originelle. ZUSAMENFASSUNG Aus diakronischer Sicht bringt das Studium des baskischen Akzents das Problem mit sich, die ziemlich verschiedenen Akzentuierungssysteme, die man heutzutage innerhalb des Baskisch-sprechenden Gebiets vorfindet, zu erklären. Während es nämlich im Zentalgebiet keinen kontrastiven Wortakzent gibt, trifft man sowohl in den östlichen als auch in den westlichen Gebieten Systeme an, die eine phonologisch distinktive Akzentuation kennen. Die Akzentsysteme ei-niger westlicher Varietäten sind besonders komplex und erweisen sich als sol-che, die auf einer Opposition zwischen akzentuierten oder vorakzentuierten und unbetonten Morphemen beruhen. Im vorliegenden Aufsatz wird die Behaup-tung aufgestellt, daß alle gegenwärtigen Akzentsysteme von einem friiheren gemeinsamen Stadium abgeleitet werden konnen, die noch ohne kontrastiven Akzent war, und daß insbesondere die westlichen Systeme sich aus einer Regel der Akzentuierung zusammengesetzter Wörter herleiten und daß der kontrastive Akzent durch die Hineinnahme einer großen Anzahl lateinischer und roma-nischer Lehnwörter zusammen mit ihrem ursprunglichen Akzentmustern ver-starkt worden sei.

D∕H: Present Understanding and Future Perspectives, an Observer’s Point of View

2009 ◽  
Author(s):  
Cristina M. Oliveira ◽  
H. Warren Moos ◽  
Michael E. Van Steenberg ◽  
George Sonneborn ◽  
H. Warren Moos ◽  
...  
Keyword(s):  
Point Of View ◽  
Future Perspectives ◽  
Present Understanding

scholarly journals Succession in family farming: gender and future perspectives

2021 ◽  
Vol 10 (3) ◽  
pp. e40810313594
Author(s):  
Juçara Elza Hennerich ◽  
Clério Plein ◽  
Luciana Oliveira de Fariña ◽  
Márcia Hanzen ◽  
Flávia Piccinin Paz Gubert
Keyword(s):  
Female Gender ◽  
Gender Issues ◽  
Rural Youth ◽  
Point Of View ◽  
Rural Environment ◽  
Future Perspectives ◽  
Family Farming ◽  
And Gender ◽  
Succession Processes ◽  
The City

The succession processes in rural properties, in particular, in family farming, has taken priority status among the themes that involve the rural environment. The present study was carried out in the extreme west of the state of Santa Catarina, between the years 2016 and 2017, when 268 farmers were interviewed. In addition to the objective of recording and discussing data related to succession, gender and generational processes, the research was also carried out as a didactic tool for agricultural sciences courses in the region. The study recorded the desire, regardless of gender, of 5.5% of young people to break connection with agriculture in their future and not participate in the succession processes. Result that opposes the point of view of the parents, who express a gender distinction in the succession role, where 72.4% relates the male gender to such, while for the female gender the desire of 94% of fathers and mothers is that the daughters, respectively, get married and / or live in the city. The study points out the importance of actions involving the parents of rural youth in succession and gender issues that are increasingly urgent in the possible future of family farming.

scholarly journals Additively manufactured nano-mechanical energy harvesting systems: advancements, potential applications, challenges and future perspectives

2021 ◽  
Vol 8 (1) ◽  
Author(s):  
Ammar Ahmed ◽  
Ali Azam ◽  
Yanen Wang ◽  
Zutao Zhang ◽  
Ning Li ◽  
...  
Keyword(s):  
Renewable Energy ◽  
Energy Harvesting ◽  
Mechanical Energy ◽  
Optimal Strategies ◽  
Point Of View ◽  
Future Research ◽  
Energy Scavenging ◽  
Renewable Energy Resources ◽  
Future Perspectives ◽  
The Usa

AbstractAdditively manufactured nano-MEH systems are widely used to harvest energy from renewable and sustainable energy sources such as wind, ocean, sunlight, raindrops, and ambient vibrations. A comprehensive study focusing on in-depth technology evolution, applications, problems, and future trends of specifically 3D printed nano-MEH systems with an energy point of view is rarely conducted. Therefore, this paper looks into the state-of-the-art technologies, energy harvesting sources/methods, performance, implementations, emerging applications, potential challenges, and future perspectives of additively manufactured nano-mechanical energy harvesting (3DP-NMEH) systems. The prevailing challenges concerning renewable energy harvesting capacities, optimal energy scavenging, power management, material functionalization, sustainable prototyping strategies, new materials, commercialization, and hybridization are discussed. A novel solution is proposed for renewable energy generation and medicinal purposes based on the sustainable utilization of recyclable municipal and medical waste generated during the COVID-19 pandemic. Finally, recommendations for future research are presented concerning the cutting-edge issues hurdling the optimal exploitation of renewable energy resources through NMEHs. China and the USA are the most significant leading forces in enhancing 3DP-NMEH technology, with more than 75% contributions collectively. The reported output energy capacities of additively manufactured nano-MEH systems were 0.5–32 mW, 0.0002–45.6 mW, and 0.3–4.67 mW for electromagnetic, piezoelectric, and triboelectric nanogenerators, respectively. The optimal strategies and techniques to enhance these energy capacities are compiled in this paper. Graphical Abstract

scholarly journals Radioactive Heat Production and Terrestrial Heat Flow in the Xiong’an Area, North China

Energies ◽  
2019 ◽  
Vol 12 (24) ◽  
pp. 4608
Author(s):  
Yue Cui ◽  
Chuanqing Zhu ◽  
Nansheng Qiu ◽  
Boning Tang ◽  
Sasa Guo
Keyword(s):  
Heat Flow ◽  
Heat Production ◽  
Central Area ◽  
Geothermal Resources ◽  
Rock Types ◽  
Terrestrial Heat Flow ◽  
Source Mechanisms ◽  
Lower Heat ◽  
Mantle Heat Flow ◽  
Area North

Herein, integrated heat production analysis in the Xiong’an area was conducted by measuring uranium, thorium, and potassium in different rock types to clarify crust heat flow contribution, simulate the conductive terrestrial heat flow, and illustrate heat source mechanisms of Xiong’an area geothermal resources. The study area was divided into three lithosphere structure types from west to east, and heat production corresponded to layer thickness and heat production with the central area having thicker crust and lower heat production than the eastern and western areas. Crustal heat production, mantle heat flow, and crust–mantle heat flow ratio reveal a ‘cold crust-hot mantle’ in the Xiong’an area.

scholarly journals Valve morphology of Didymosphenia geminata (Bacillariophyceae) from Santa Cruz and Tierra del Fuego provinces, Patagonia, Argentina.

2020 ◽  
Vol 55 (4) ◽  
Author(s):  
Noelia M. Uyua ◽  
Silvia E. Sala ◽  
Norma H. Santinelli ◽  
Alicia V. Sastre ◽  
Juan I. Cortés ◽  
...  
Keyword(s):  
Light And Electron Microscopy ◽  
Central Area ◽  
Point Of View ◽  
Tierra Del Fuego ◽  
Santa Cruz ◽  
Didymosphenia Geminata ◽  
Valve Morphology ◽  
Massive Growth ◽  
Southern Patagonia ◽  
Morphology And Morphometry

Background and aims: In 2013, blooms similar to those produced by Didymosphenia geminata (Lyngbye) M. Schmidt around the world, were detected in the Grande River basin, Tierra del Fuego province, and in 2014 in de las Vueltas River in Santa Cruz province. The aim of this paper is to analyze the valve morphology and morphometry of these materials to establish if they correspond to D. geminata or to other species of the genus that is producing the massive growth in southern Patagonia. M&M: Samples were collected at Grande River in 2013 and 2015 and, in de las Vueltas River in 2015 and 2016. Samples were analyzed with light and electron microscopy. For morphometric analyses 100 specimens from each sample were measured and statistical analyses were carried out using the R statistical package. Results: The studied populations have the same fine morphology described for other populations collected in Patagonia. Nevertheless, in some sampling sites from Santa Cruz province, we found a morphotype with a markedly smaller size, subcapitated poles, little marked constrictions of the poles, a broad central area (relative to cell size) and 1 to 3 stigmata, that was never reported in South America. Conclusions: The studied populations correspond to D. geminata ssp. geminata Metzeltin & Lange-Bertalot. From a morphological point of view the smaller morphotype present in Santa Cruz belongs to the same subspecies but can be easily misidentified during the routine monitoring programs carried out with light microscope due its size and valve outline.

scholarly journals GEOTHERMAL DEVELOPMENT IN CAMEROON

2020 ◽  
Vol 19 (1) ◽  
pp. 32
Author(s):  
P. N. N. Nemzoue ◽  
N. A. K. Keutchafo ◽  
J. P. Tchouankoue
Keyword(s):  
Geothermal Energy ◽  
Electrical Power ◽  
Point Of View ◽  
Geological Investigation ◽  
Geothermal Resources ◽  
Lake Chad ◽  
Cameroon Volcanic Line ◽  
Hydroelectric Energy ◽  
Mount Cameroon ◽  
The Government

Africa is currently experiencing a period of economic growth. Its population is growing rapidly and its economies grow and diversify. To be sustainable, such growth requires a large investment in the energy sector. In the case of Cameroon hydroelectric energy is the main source of electrical power whereas the analysis of the geological point of view shows that Cameroon is unique in west-northern of Africa for its active volcanic line (with the last eruption of Mount Cameroon that last erupted in 1999 and 2000) that is a favorable zone for the production of power from geothermal resources. The Cameroon Volcanic Line (CVL) is 100 km wide linear magmatic megastructure oriented N30°E that extends more than 1500 km from Pagalu Island in the Gulf of Guinea to Lake Chad. Along this active volcanic line, more than one hundred and thirty thermal springs are found with the hottest spring at Woulndé (74°C).The aim of this paper is to evaluate the importance of geothermal energy development in the Cameroon Volcanic Line through a geological investigation of areas (Mt. Cameroon and Adamawa) bearing springs with hottest temperatures. This work is a compilation of the bibliographic analysis find at the same topic of research with a source like an International reviewed article, local documents and a websites research. The absence of commitment and enthusiasm from the government is weakening the sector potentiality to be developed either by private sector investments and also foreign investors. Other applications of geothermal energy in Cameroon are also discussed.

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