scholarly journals Adrian Cowell e a Amazônia Brasileira

2021 ◽  
Author(s):  
Filipe Freitas Chaves
Keyword(s):  
Conflicts Of Interest ◽  
Road Construction ◽  
Indigenous Populations ◽  
Second Phase ◽  
Hydroelectric Dams ◽  
The People ◽  
Rubber Tappers ◽  
Gold Miners ◽  
Two Phases ◽  
The Impact

This article aims to examine two phases of the English director Adrian Cowell (1934-2011), who documented the Brazilian Amazon for 50 years. The first phase that we intend to examine is when he arrives in the country and meets the Villas Bôas brothers, filming the attempt by the sertanista brothers to attract isolated Indians into the interior of the Xingu National Park, in order to save them from civilization. The second phase we want to analyze is when he returns to the country, in 1980, after a season abroad, and films for a decade what would become his most famous series: The Decade of Destruction. Adrian Cowell followed the entire process of development and destruction of the Amazon, conflicts of interest, the impact of major projects, advances in agriculture and livestock, colonization projects, road construction and hydroelectric dams and their consequences in daily life of the people who live in the region: indigenous populations, rubber tappers, farmers, loggers, gold miners and others. The study of his films is extremely important to encourage debate and awareness about socio-environmental issues, aiming at the preservation of the largest forest in the world.

scholarly journals DIFFERENCES AND SIMILARITIES IN IMPACTS OF HYDROELETRIC DAMS BETWEEN NORTH AND SOUTH OF BRAZIL

2016 ◽  
Vol 19 (2) ◽  
pp. 265-286 ◽  
Author(s):  
GUILLAUME LETURCQ
Keyword(s):  
Hydroelectric Dams ◽  
Secondary Sources ◽  
The North ◽  
The People ◽  
Hydroelectric Dam ◽  
Area North ◽  
South Of Brazil ◽  
The Impact ◽  
North And South ◽  
Belo Monte

Abstract The environmental impacts of hydroelectric dams in Brazil are investigated in local and regional scales, for the last years. In this paper, we analyze the impact than the establishment of a hydroelectric dam has for the people and their spaces, with the comparative experiences occurred for the North and South of Brazil. We will focus on aspects related to the organization of families, social fight, the compensation and resettlement of people affected by the dam's construction, as well we take a look to the similarities between the two areas, with emphasis on aspects related to migration, mobility and landscapes. For this, we rely on research carried out on the river Uruguay (South), based on interviews, questionnaires and studies of primary and secondary sources, from 2007 to 2014 and also in a survey that is currently being held in Belo Monte area (North), which also uses primary and secondary sources, with fieldwork periods.

scholarly journals Physics-Based Simulations of Flow and Fire Development Downstream of a Canopy

Atmosphere ◽  
2020 ◽  
Vol 11 (7) ◽  
pp. 683
Author(s):  
Gilbert Accary ◽  
Duncan Sutherland ◽  
Nicolas Frangieh ◽  
Khalid Moinuddin ◽  
Ibrahim Shamseddine ◽  
...  
Keyword(s):  
Turbulent Flow ◽  
Forest Canopy ◽  
Prescribed Burning ◽  
Second Phase ◽  
Flow Conditions ◽  
Developed Turbulence ◽  
Large Eddy ◽  
Long Time ◽  
Two Phases ◽  
The Impact

The behavior of a grassland fire propagating downstream of a forest canopy has been simulated numerically using the fully physics-based wildfire model FIRESTAR3D. This configuration reproduces quite accurately the situation encountered when a wildfire spreads from a forest to an open grassland, as can be the case in a fuel break or a clearing, or during a prescribed burning operation. One of the objectives of this study was to evaluate the impact of the presence of a canopy upstream of a grassfire, especially the modifications of the local wind conditions before and inside a clearing or a fuel break. The knowledge of this kind of information constitutes a major element in improving the safety conditions of forest managers and firefighters in charge of firefighting or prescribed burning operations in such configurations. Another objective was to study the behavior of the fire under realistic turbulent flow conditions, i.e., flow resulting from the interaction between an atmospheric boundary layer (ABL) with a surrounding canopy. Therefore, the study was divided into two phases. The first phase consisted of generating an ABL/canopy turbulent flow above a pine forest (10 m high, 200 m long) using periodic boundary conditions along the streamwise direction. Large Eddy Simulations (LES) were carried out for a sufficiently long time to achieve a quasi-fully developed turbulence. The second phase consisted of simulating the propagation of a surface fire through a grassland, bordered upstream by a forest section (having the same characteristics used for the first step), while imposing the turbulent flow obtained from the first step as a dynamic inlet condition to the domain. The simulations were carried out for a wind speed that ranged between 1 and 12 m/s; these values have allowed the simulations to cover the two regimes of propagation of surfaces fires, namely plume-dominated and wind-driven fires.

scholarly journals DAMPAK PEMEKARAN DESA TERHADAP INFRASTRUKTUR DESA PAKUURE DUA KECAMATAN TENGA KABUPATEN MINAHASA SELATAN

2018 ◽  
Vol 14 (1) ◽  
pp. 231
Author(s):  
Grace A. A. G. Panambunan ◽  
Paulus A. Pangemanan ◽  
Benny A. B. Sagay
Keyword(s):  
Local Community ◽  
Positive Impact ◽  
Descriptive Analysis ◽  
Road Construction ◽  
Infrastructure Development ◽  
Economic Gain ◽  
The People ◽  
Asphalt Road ◽  
The Impact

This study aims to determine the impact of the expansion of Pakuure Dua village on village infrastructure. The study was conducted from October to December 2017 Determination of the number of samples taken purposively (Purposive Sampling) The research method using descriptive analysis with informants of the local community along with village tools that will be presented in tabular form. The resulting data was analyzed using Likert scale. The result of the research concludes that the expansion of Pakuure Dua village has a positive impact on the acceleration of infrastructure development. This can be proved by the repair of roads in each aisle that used to be potholes built into asphalt road, concrete rebound road, hotmix asphalt road. The construction of the bridge between the hallway to the school and the field, the construction of the school building felt by the community is very good. With equitable road construction, ease of communication between community and government is also equitable, smooth communication and transportation activities also make a very good economic gain for the people of Pakuure Dua village.

Sensitivity Study of Lower Plenum Boron Injection in a BWR

2009 ◽  
Author(s):  
Jin Yan ◽  
Andrew Mallner
Keyword(s):  
Sensitivity Study ◽  
Operating Conditions ◽  
Second Phase ◽  
Cfd Model ◽  
Technical Approach ◽  
Test Program ◽  
Scale Test ◽  
Water Reactors ◽  
Two Phases ◽  
The Impact

Boiling water reactors (BWRs) are equipped with a standby liquid control system (SLCS). The SLCS is used to inject boron to shutdown the reactor from full power condition in the event that the control rods fail to insert. In order for the SLCS system to shut down the reactor, adequate mixing of the borated solution with the reactor coolant is necessary. In BWRs prior to BWR 5, the boron injection points are located in the lower plenum. The objective of this project is to evaluate the impact of the operating conditions on the boron injection based on the understanding of the behavior of multi-species flow in typical pre-BWR 5 reactors by using computational fluid dynamics (CFD). The project is divided into two phases. At the first phase, a CFD model based on the test configurations of GE 1/6 scale test program was established. The results were validated against measurements conducted by GE during the 1/6 scale test program performed in 1981. The validation shows that the CFD can give accurate predictions of the boron mixing. The technical approach employed in the CFD model was adequate to capture the boron mixing process in the BWR lower plenum. The second phase of the project is the sensitivity study based on the same technical approach developed in the first phase. However, a simplified BWR lower plenum model was used due to the time constrain. In the sensitivity study, the baseline case and four additional cases with different operating conditions were investigated using the same CFD approach.

Assessment of wind power capacity credit in Morocco: Outlook to 2020

2019 ◽  
Vol 44 (2) ◽  
pp. 196-207
Author(s):  
Yassir El Karkri ◽  
Aboubakr El Makrini ◽  
Hassane El Markhi ◽  
Tijani Lamhamdi ◽  
Hassan El Moussaoui
Keyword(s):  
Wind Energy ◽  
Wind Farm ◽  
Electric Energy ◽  
Wind Farms ◽  
Electricity Production ◽  
Second Phase ◽  
Energy Integration ◽  
Production Network ◽  
Two Phases ◽  
The Impact

The present article focuses on the calculation of the wind capacity credit by integrating the Moroccan project on the wind energy of 1000 MW in 2020. After an introduction to the Moroccan Integrated Wind Energy Project, a wind capacity credit assessment program will be implemented on Matlab software including the whole information about “installed capacity, number of plants, failure rate, types of installed units, peak demand etc.” This program will be used to calculate the safety rate of an electrical system as well as the capacity credit of Morocco’s electricity production network. This section will be built in two phases: the first phase will examine the impact of TAZA wind farm with an installed power of 150 MW, while the second phase will focus on the generalization of this study on all the wind farms that will be injected to the Moroccan grid in 2020. The research provides conclusion according to comments and assessment of the impact of this electric energy integration based on the wind generation.

scholarly journals The impact of non-accessible library and information science journals on research productivity in Pakistan

2016 ◽  
pp. 40-57
Author(s):  
Shamshad Ahmed ◽  
Awais Uzair
Keyword(s):  
Social Networking Sites ◽  
Research Productivity ◽  
Information Science ◽  
Citation Rate ◽  
Journal Citation Report ◽  
Library And Information Science ◽  
Second Phase ◽  
Mixed Method Research ◽  
Two Phases ◽  
The Impact

The purpose of this paper is to identify: (a) Non-accessible library and information science journals from HEC National Digital Library (DL) Subscribed databases, (b) Approaches adopted by the LIS researchers to acquire non-accessible articles, and (c) The impact of non-accessible articles on their research endeavor. A sequential exploratory strategy of mixed method research was applied to identify the impact of non-accessible LIS journals on research. This study was completed in two phases. In the first phase, an online surfing of all HEC subscribed databases was conducted and a list of openly accessible, partially accessible and non-accessible LIS journals was prepared. Impact factor of journals was checked from the list of Journal Citation Report by Thomson Reuter, 2013. In the second phase, a structured questionnaire was prepared to identify the approaches adopted by the researchers to acquire non-accessible articles and their impact on research productivity. Findings of the study show that (a) Emerald, (b) Science Direct, (c) JSTOR, (d) Project Muse, (e) Taylor & Francis, (f) Wiley-Blackwell Journals, and (g) University of Chicago Press, are the HEC subscribed databases which have LIS journals. Study reveals that there are 18 % non-accessible and 37 % partially accessible LIS journals on the HEC subscribed databases. Researchers tried to acquire non-accessible articles through friends, social networking sites (SNS) Groups, BDD and by requesting to authors etc. Respondents agreed that non-accessible journals do impact on research productivity. As a result, citations of non-accessible articles decreases, which negatively impact the quality and quantity of both authors and researchers' work. The outcomes of this study are significant for LIS researchers to become aware of the current situation of non-accessible journals and its impact on their research endeavors. It will also guide the HEC and research institutions to redesign their policy for the subscription of relevant databases that will enable complete access to journals on LIS discipline. It will also help to increase the quality of researchers' work and citation rate of authors' articles. This study may then be replicated in other fields and countries also. There is not enough work analyzing the impact of non-accessible journals on research productivity.

scholarly journals Impact of Twitter Sentiment Related to Bitcoin on Stock Price Returns

2020 ◽  
Vol 26 (6) ◽  
pp. 60-71
Author(s):  
Feda Hassan Jahjah ◽  
Muhanad Rajab
Keyword(s):  
Exchange Rate ◽  
Financial Markets ◽  
Stock Price ◽  
Second Phase ◽  
Digital Currency ◽  
Two Phases ◽  
Negative Sentiment ◽  
The Impact ◽  
Deep Learning Model ◽  
Positive Effect

Twitter is becoming an increasingly popular platform used by financial analysts to monitor and forecast financial markets. In this paper we investigate the impact of the sentiments expressed in Twitter on the subsequent market movement, specifically the bitcoin exchange rate. This study is divided into two phases, the first phase is sentiment analysis, and the second phase is correlation and regression. We analyzed tweets associated with the Bitcoin in order to determine if the user’s sentiment contained within those tweets reflects the exchange rate of the currency. The sentiment of users over a 2-month period is classified as having a positive or negative sentiment of the digital currency using the proposed CNN-LSTM deep learning model. By applying Pearson's correlation, we found that the sentiment of the day (d) had a positive effect on the future Bitcoin returns on the next day (d+1). The prediction accuracy of the linear regression model for the next day's revenue was 78%.

Location and hierarchical allocation disaster with combined ε-constraint and simulation-based optimization approach

SIMULATION ◽  
2021 ◽  
pp. 003754972110639
Author(s):  
Sogol Mousavi ◽  
Seyed Mojtaba Sajadi ◽  
Akbar AlemTabriz ◽  
Seyyed Esmaeil Najafi
Keyword(s):  
Second Phase ◽  
Optimization Approach ◽  
Allocation Model ◽  
Location Allocation ◽  
Medical Centers ◽  
Simulation Based ◽  
Simulation Based Optimization ◽  
Two Phases ◽  
The Impact ◽  
Hierarchical Allocation

The increasing frequency of natural disasters and the necessity of proper planning to minimize the impact and casualties of such crises have always been matters of great concern to human societies. In this study, a hybrid mathematical-simulative location-allocation model is proposed to carry out disaster management (DM) efforts with maximum coverage in the immediate aftermath of an earthquake. The proposed model consists of two phases: determining the optimal location of the temporary emergency stations (TECs), followed by optimal and hierarchical allocation of casualties to said temporary medical centers (TMCs). Given the contradictory nature of the model’s two objectives, that is, minimizing the cost of setting up TMCs and the time taken to transfer casualties to TMC. In the second phase, a simulation-based optimization approach is employed to simulate casualties’ behavior at the onset of the disaster and to determine the optimal capacity of the medical centers. The findings indicate that the costs and distance traveled by casualties during the earthquake have been reduced by 15%.

Modeling and Simulation of High-Velocity Projectile Impact on Storage Tank

2016 ◽  
Vol 138 (4) ◽  
Author(s):  
Y. W. Kwon ◽  
K. Yang ◽  
C. Adams
Keyword(s):  
High Velocity ◽  
Storage Tank ◽  
Structural Response ◽  
Dynamic Responses ◽  
Second Phase ◽  
Fluid Medium ◽  
Parametric Studies ◽  
Two Phases ◽  
Improved Design ◽  
The Impact

A series of numerical modeling and simulations were conducted for dynamic responses of a fluid-filled storage tank subjected to impact loading resulting from a high-velocity projectile. The focus of the study was placed on two phases. The first phase examined the structural response during the impact period without penetration while the second phase investigated the period of a projectile traveling through a fluid medium inside the storage tank. Some parametric studies were conducted to understand the dynamic responses of the structure. The parameters considered were the fluid filling level in the storage tank, fluid density, tank material properties, and projectile mass and velocity. Understanding what parameters would result in most severe damage to the structure can lead to improved design of storage tanks and proper protection against any potential incident.

Impact of Avionic Design Characteristics on Technical Training Requirements and Job Performance

1975 ◽  
Vol 17 (1) ◽  
pp. 13-24 ◽  
Author(s):  
Kenneth W. Potempa ◽  
Larry M. Lintz ◽  
Richard S. Luckew
Keyword(s):  
Student Performance ◽  
Technical Training ◽  
Second Phase ◽  
Regression Equations ◽  
Error Performance ◽  
Training Requirements ◽  
Task Time ◽  
Design Characteristics ◽  
Two Phases ◽  
The Impact

This study was performed in two phases. The first phase concentrated on the influence of avionic design and technical training factors on student performance. The second phase dealt with the impact of design and personnel factors on the performance of technicians in operational Air Force units. Avionic components were scaled on a variety of design characteristics, and data were collected on the task time and error performance of students and technicians performing a functional checkout maintenance task on the components. Personnel data were also obtained on each subject. Multiple-regression equations were then developed to predict task performance from design characteristics and personnel measures. The multiple R's for students were 0.90 for time and 0.82 for errors. The multiple R's for technicians ranged from 0.60 to 0.88, depending on the type of maintenance and criterion measure used; all R's were significant at the p < .001 level.

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