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Touristic urbanization and greening of coastal dune fields:A long-term assessment of a temperate sandy barrier of Argentina

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Journal of Geographical sciences 2025年第1期 206-230页

作者： GARZO Pedro Andrés DADON José Roberto IsLA Federico Ignacio Instituto de Investigaciones Marinas y Costeras (IIMyC-CONICET/UNMDP) Instituto de Geología de Costas y del Cuaternario Dr.Enrique J.schnack (IGCC-CIC/UNMDP) Universidad de Buenos Aires Facultad de Arquitectura Dise?o y Urbanismo Centro de Investigaciones Gestión de Espacios Costeros (GEC-FADU/UBA) Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET)

Dune barrier systems represent highly sought-after coastal landscapes for tourism and urban development around the world. However, a century ago, they were considered hazardous environments due to their great dynamic nature. As a result, stabilization practices were considered necessary. The systematic introduction of fast-growing exotic trees helped stabilize the sand, making it easier for tourism urbanization to take place, but also leading to erosion processes. This paper aims to assess long-term changes in vegetation cover over a large temperate barrier in Argentina. This complex region includes urban resorts, afforestation zones, and protected areas. A GIs-based geospatial analysis was conducted using a large satellite database(> 350 images), and the future evolution of the vegetation was modeled. The results revealed two primary spatiotemporal patterns associated with a gradual expansion of vegetation cover, accompanied by a concurrent reduction in sandy areas. In 1986, the dune area comprised 75% more surface than vegetation, whereas in 2021, it represented 60% less than vegetation. Furthermore, the 2050 scenario suggests a potential 40% reduction of dunes in certain areas. It is necessary to enhance management actions aimed at maintaining dune mobility and ensuring local and regional sediment balance. Long-term management strategies must focus on restoring native plant communities and controlling invasive species, and avoiding new dune fixation initiatives based on the introduction of exotic species.

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Quantitative Easing: Money supply and Commodity Prices of Oil, Gold, and Cocoa in Ghana

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Open Journal of statistics 2023年第5期13卷 663-693页

作者： samuel Kwaku Obeng samuel Bassah Kofi Quansah Theresa Dowetin Ampem Darko Nsiah Ezekiel nii Noye Nortey Ebenezer Okyere Research and statistics Unit Minerals Commission of Ghana Accra Ghana sPARKX Ghana Ltd. Accra Ghana Datus International school Tema Ghana statistics Unit CID Headquarters Accra Ghana Department of statistics and Actuarial science University of Ghana Accra Ghana Research and Policy Unit Bank of Ghana Accra Ghana

This study investigates the dynamic relationships between the money supply (M2) and key commodity prices (Cocoa, Gold, and Crude) in the context of Ghana. Utilizing Vector Error Correction Model (VECM) analysis, we analyze the short-term and long-term Granger causality relationships among these variables, aiming to shed light on the potential linkages between monetary policy and commodity markets. The analysis covers the period from December 1999 to April 2023, using lag structures of 1 and 8 to capture both short-term and more enduring effects. Our findings reveal significant Granger causality relationships between the money supply and various commodities, with nuanced patterns emerging across different lags. In the short-run, our results suggest bidirectional causal relationships between COCOA and M2, CRUDE and M2, and GOLD and M2. Additionally, M2 Granger causes changes in COCOA, CRUDE, and GOLD. However, the causal relationship between COCOA and GOLD appears to be unidirectional, with COCOA not significantly Granger causing changes in GOLD. The short-term findings highlight the intricate interplay between monetary policy and commodity markets. In the long-run (lag 8), our analysis unveils robust Granger causality relationships between the variables. Past values of COCOA, CRUDE, and GOLD Granger cause changes in M2, indicating a notable influence of commodity markets on the money supply. similarly, M2 Granger causes changes in CRUDE and GOLD. Notably, the findings underscore a more comprehensive and intertwined relationship between monetary policy and commodity prices in the long-run. Based on these results, we derive several policy implications. Policymakers should carefully consider the potential impact of monetary policy decisions, such as quantitative easing, on commodity markets and price dynamics. Measures to stabilize commodity prices, promote export diversification, manage inflation expectations, and enhance economic resilience are recommended. Additional

关键词： Quantitative Easing Money supply Cocoa Gold Crude VECM

Maxillofacial Injuries at the Komfo Anokye Teaching Hospital, Kumasi, Ghana: A Preliminary study

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Open Journal of stomatology 2021年第3期11卷 133-147页

作者： solomon Obiri-Yeboah Robert nii Lamy Larmie Nana Tuffour Ampem Gyimah Alexander Oti Acheampong Elijah Asomaoh Peter Donkor school of Medicine and Dentistry Kwame Nkrumah University of Science and Technology Kumasi Ghana Komfo Anokye Teaching Hospital Kumasi Ghana

Background: The aetiology and pattern of maxillofacail injuries vary in different parts of the world and even the same country. The purpose of the study was to determine the epidemiology of maxillofacial injuries at a... 详细信息

strong>Background: strong>The aetiology and pattern of maxillofacail injuries vary in different parts of the world and even the same country. The purpose of the study was to determine the epidemiology of maxillofacial injuries at a tertiary Hospital in Ghana. strong>Methodology:strong> This is a six-month (January to June 2015) prospective study. Information on age, sex, aetiology, injury type etc. was collected using a specialized design data collection form. Data was analyzed using the sPss 17th version. Ethical approval was obtained. strong>Result:strong> The total study sample was 111 with a male to female ratio of 2.5:1. Majority (34.2%) were within the ages of 21 to 30 years. Majority of the victims were urban dwellers. Most of the injuries occurred on the highway (42.3%) and in the evening (35.2%). Only a small percentage (5.4%) of the road traffic crashes (RTC) victims were in some form of protection. Twenty-one (18.9%) of the injuries were intentional, of which 18 (85.7%) were assault. The commonest maxillofacial injury was a combination of soft and hard tissues 72 (64.7%). The commonest cause of maxillofacial soft tissue injuries was RTC, 72.8%. Laceration (55.6%) was the most common soft tissue injury recorded. Mandibular fractures constituted the commonest hard tissue injuries. strong>Conclusion: strong>This study has shown that road traffic crashes are the most common cause of injuries to the maxillofacial region. The mandible is the most frequent site of fracture, while the commonest soft tissue injury is laceration. Majority of the victims were young energetic males and adherence to road traffic regulations was very low.

关键词： Maxillofacial Injury Road Traffic Crush Mandibular Le Forte Fracture

soft x-ray tomographic reconstruction of Heliotron J plasma for the study of magnetohydrodynamic equilibrium and stability

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Plasma science and Technology 2019年第6期21卷 72-78页

作者： s PUROHIT Y sUZUKI s OHDACHI s YAMAMOTO sOKENDAI The Graduate University for Advanced Studies Toki Gifu 509-5292 Japan National Institute for Fusion science Toki Gifu 509-5292 Japan Institute of Advanced Energy Kyoto University Gokasho Uji Kyoto 611-0011 Japan

The preparation for an experimental soft x-ray tomography study on the Heliotron J (H-J) machine is carried out,with the objectives of evaluating the capability of the current soft x-ray tomographic system in terms of the identification of different mode structures and their poloidal rotation,and the axis shift with different plasma and machine parameters,and fixing the physics goals for the experimental *** preparations were carried out via a simulated soft x-ray data set arising from different plasma conditions,such as magnetic islands,low beta and high *** x-ray tomography (sXT) is performed by the discrete pixel method including singular value decomposition and Phillips-Tikhonov regularization,to obtain clear and smooth *** H-J soft x-ray tomography results from simulated soft x-rays for the equilibrium H-J plasma sensed the magnetic axis shift clearly and an estimate was also *** reconstruction for mode structure m =1/n =1 was obtained along with the realization of the poloidal rotation of the *** reconstruction for the m =2/n =1 mode was not very clear for the current soft x-ray diagnostic *** mode identification was not possible due to the lack of *** sXT from the current soft x-ray diagnostic on H-J,the magnetic axis shift can be estimated and the m =1/n =1 mode can be *** of higher poloidal modes is difficult with the current design.

关键词： Heliotron J tomography soft x-ray magnetohydrodynamics

suppression of ferroresonance using passive memristor emulator

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Chinese Physics B 2021年第6期30卷 667-674页

作者： s Poornima Electrical Engineering Department Anna UniversityChennai-600025India

Power system inherently consists of capacitance and inductance in its components. Equipment with saturable inductance and circuit capacitance provides circumstances of generating ferroresonance, resulting in overvoltage and overcurrent in the connected system. The effects of ferroresonance result in insulation failure and hence damage to the equipment is unavoidable. Though many devices are proposed for mitigating such circumstances, a promising technology of using memristors may provide better performance than others in the future. A memristor emulator using the N-channel JFET J310 is used in this work. Unlike other electronic components that replicate memristor properties, the chosen memristor emulator is a passive device since it does not need any external power supply. simulation and experimental results verify the design of a memristor emulator and the characteristics of an ideal memristor. Experimental results prove that the memristor emulator can suppress the fundamental ferroresonance induced in a prototype single phase transformer. The results of the harmonic analysis also validate the memristor performance against the conventional technique.

关键词： ferroresonance memristor emulator passive components single-phase transformer

Reflection and transmission of quasi-plane waves at the interface of piezoelectric semiconductors with initial stresses

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Applied Mathematics and Mechanics(English Edition) 2021年第7期42卷 951-968页

作者： s.A.sAHU s.NIRWAL s.MONDAL Department of Mathematics and Computing Indian Institute of Technology(ISM)Dhanbad 826004JharkhandIndia

We examine the reflection and transmission phenomena of quasi-longitudinal plane(QP)waves in an AlN-ZnO laminated composite *** structure is designed under the influence of the initial stresses in which one carrier piezoelectric semiconductor(PsC)half-space is in welded contact with another PsC *** secular equations in the transversely isotropic PsC material are derived from the general dynamic equation,taking the initial stresses into *** is shown that the incident quasi-longitudinal wave(QP-mode)at the interface generates four types of reflected and transmitted waves,namely,QP wave,quasi-transverse(QsV)wave,electric-acoustic(EA)wave,and carrier plane(CP)*** algebraic equations are obtained by imposing the boundary conditions on the common interface of the laminated *** and transmission coefficients of waves are obtained by implementing Cramer’s *** impacts of the initial stresses and exterior electric biasing field on the reflection and transmission coefficients of waves are investigated and presented graphically.

关键词： piezoelectric semiconductor(PsC) electric biasing field normal stress shear stress

How graph features decipher the soot assisted pigmental energy transport in leaves?A laser-assisted thermal lens study in nanobiophotonics

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Chinese Physics B 2022年第8期31卷 675-681页

作者： s sankararaman Department of Optoelectronics University of KeralaTrivandrum695581KeralaIndia

The paper employs the principles of graph theory in nanobiophotonics, where the soot-assisted intra-pigmental energy transport in leaves is unveiled through the laser-induced thermal lens(TL) technique. Nanofluids with different soot concentrations are sprayed over Lablab purpureus(L) sweet leaves, and the extracted pigments are analyzed. The graph features of the constructed complex network from the TL signal of the samples are analyzed to understand their variations with optical absorbance. Besides revealing the presence of optimum soot concentration that can enhance photosynthesis,the study brings out the potential application of graph features in nanobiophotonics.

关键词： nanobiophotonics thermal lens soot pigmental energy transfer graph theory

Design Intervention: An Artistic strategy (A strategy) to Minimize Text Fading and Metal Commemorative Plaque Theft in Ghana

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Open Journal of Metal 2023年第1期13卷 1-17页

作者： Ansah-Asiedu Junior Mensah Fiifi Ebenezer Vicku Charles samuel nii Adamah sampah Henrietta Meakoa Barfi-Mensah Anita Akwaa Toffah Department of Industrial Art Ho Technical University Ho Ghana

The Commemorative Plaque Industry thrives at the hands of the local craftsmen in Ghana. Techniques, methods, tools, and materials used as handed to them by their previous masters have remained the same over the years. As a result, plaques produced had peculiar problems such as text fading, degrading the actual effect of the plaques. Additionally, metals once widely used for making plaques devoid of text fading in the industry seem to have lost their relevance due to metal plaque theft, rust on metal plaques, and the continuous rise in metal prices. This research uses descriptive, experimental, and case studies of the qualitative research method to examine the problems associated with locally produced commemorative plaques. A total of hundred (100) artisans, including metal scrap dealers, and plaque buyers, were selected for the study. Direct observation and face-to-face interviews were conducted with the local craftsmen, art lecturers and students, scrap dealers, and plaque buyers who were purposively sampled for the study. The study revealed that existing materials like ceramic and aluminium could be integrated innovatively to produce commemorative plaques devoid of text fading;a corrosion-resistant text could be made using anodized or coated metals used in smaller quantities to reduce costs while also making them unattractive for theft and lastly, silicone sealant was found to be a viable option for permanently inscribing text on porcelain bases. The results clarify and underline the necessity to grow the local plaque industry in terms of plaque production as another essential basis to assure high-quality plaques with no text fading that will survive for generations to serve their intended purpose.

关键词： Commemorative Plaques strategy Porcelain silicone sealant Anodized Metal

Dynamics of Apparent Horizons in (N+2)-Dimensional space-Times

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Chinese Physics Letters 2012年第11期29卷 23-26页

作者： s.s.Zade Department of Mathematics J.B.College of ScienceWardhaIndia

We analyze the time of formation of central singularities in(N+2)-dimensional *** is shown that the time of formation of central singularity decreases with the increase in dimensions of the *** dynamics of trapped sur... 详细信息

关键词： singularity dimensions graphical