1,722,014 research outputs found
Dinâmica geo ambiental da floresta do jamari e seu entorno: um estudo de caso com aplicação da geotecnologia
No full textDissertação de Mestrado apresentado junto ao
Programa de Pós-Graduação em Desenvolvimento
Regional e Meio Ambiente, Área de Concentração
em Saúde e Meio Ambiente, para obtenção do
Título de Mestre em Desenvolvimento Regional e
Meio Ambiente. Orientador: Prof. Dr. Vanderlei ManiesiA Floresta Nacional do Jamari possui uma característica diferenciada por se tratar de uma
unidade de conservação com a utilização sustentável de seus recursos através de manejos
florestais. A geotecnologia proporcionou a análise através de cartas imagem de seu histórico de
ocupação mostrando que a área da Flona do Jamari até 1997 apresentou cerca de 90% de seu
desmatamento (6.761 ha) associados à atividade de mineração de cassiterita e os outros 10% (736
ha), até 2014, também associados à atividade de mineração. O estudo da análise de
vulnerabilidade natural à erosão da Floresta Nacional do Jamari e seu entorno foi realizado por
meio de técnicas de geotecnologia com ajustes e validação de dados de campos. O método
geotecnológico utilizado para geração dos dados foi o de Crepani et al. (2001) que visa
elaboração de mapas da vulnerabilidade natural à erosão fundamentada no conceito de
Ecodinâmica de Tricart (1977), definindo a relação entre os processos de morfogênese e
pedogênese. Os dados da pesquisa revelaram que na área de estudo a característica ambiental
predominante é classificada como moderadamente estável, porém existem atividades de produção
agrícola e/ou pecuária em seu entorno que podem aumentar a fragilidade ambienta
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Jamari Colbert at Freshman Orientation
No full textPhotograph of Jamari Colbert at UNT freshman orientation with text that says 'class of 2028', 2024
Perfil social e produtivo do território Vale do Jamari - Rondônia.
No full textGeração de conhecimento coletivo sobre o perfil social e produtivo do Território Vale do Jamari; Aspectos econômicos da cafeicultura tradicional no Território Vale do Jamari: custos de produção no Município de Alto Paraíso; Produção de café agroecológico no Território Vale do Jamari; Economia leiteira no Território Vale do Jamari: o caso do Município de Machadinho d? Oeste, Rondônia.Capítulos assinados por: Vânia Beatriz Vasconcelos de Oliveira; Samuel José de Magalhães Oliveira; Ana Karina Dias Salman; Iraque Moura de Medeiros; Edna Patrício e Fabiana Alves Demeu
Modified Design of Pin-on-Ring Tribometer for Hip Joint Prostheses Measurement; Case Study on Salat Activity_Peer Review
No full text, Jamari Jamari, Sulardjaka Sulardjaka, Mohamad Tauviqirrahman, Emile van der Heid
Communication apprehension of students in the ESL classroom / Suzilla Jamari
No full textThis study attempted to investigate the communication apprehension of students in the
ESL classroom. The participants consisted of 31 Bachelor of Science (Hons) Tourism
Management at UiTM Melaka, who are taking BEL492 (Presentation Skills) course.
Of 31 students, 9 students are male and 22 students are female. McCroskey’s (1982)
Personal Report of Communication Apprehension (PRCA-24) modified version was
utilized in collecting the data about communication apprehension among the students.
Variables like language achievement and gender were examined. Descriptiveanalyses,
Gamma-test, and independent t-test were used to find out the relationships.
The findings showed that speech activity causes the highest communication
apprehension among the students; followed by meeting, conversation, and group
discussion activities. There were no significant influences of language achievement
and gender on students’ communication apprehension. Main implications derived
from this study include finding out the communication activities that cause the highest
communication apprehension to work on them; and giving students more
opportunities to involve in communication activities in ESL classroom to give
students the familiarity with the target language. For future research, it is
recommended that this topic is measured with larger group of participants, wider
communication area and scope of study, and collaborate with other instruments to find
out more information on students communication apprehension
Hydrological and geochemical characteristics of the Jamari and Jiparana river basins (Rondonia, Brazil)
No full textThe authors investigate the hydrological and geochemical characteristics of the Jamari
(30430 km 2) and Jiparana (60350 km 2) river basins (Amazonia), during the period 1978-1984. A
spectral analysis of Fourier is applied to time series of mean monthly river discharges, in order to assess
the contribution (7 to 8%) of the surface runoff to the total river flow. The mean annual runoff
coefficient calculated for the Jiparana river basin (36%), is higher than for the Jamari (32%), and this
coefficient increases during the study period, only for the Jiparana. The total specific suspended
sediment discharge calculated for both rivers shows the same value 13 t/km2/y, and the estimated
suspended sediment concentration in the surface runoff is slightly superior for the Jiparana river (0.3 g/
1) than for the Jamari one (0.2 g/l). The river suspended sediments are mainly composed of kaolinite,
quartz and feldspar, but the Jiparana is more enriched in quartz. For both rivers, the dominant clay
mineral is the kaolinite which is in agreement with the rock weathering type determined for both basins
using the Tardy's weathering index: the monosiallitisation. The total chemical erosion rate calculated
after correction for the atmospheric inputs (ions and CO2), is higher for the Jiparana (10.11 t/km2/ y)
than for the Jamari river basin (7.75 t/km2/ y). These values are lower than the mechanicald enudation
rate calculated previously for both river basins
Checklist of the fishes from Jamari River basin, in areas under influence of dams, Rondônia, Brazil
No full textAbstract: The Madeira River is the most extensive tributary of the Amazon River and has the largest diversity of fishes in the world. On its right bank, the Madeira River receives the Jamari River, in which the first hydroelectric power plant (HPP) in State of Rondônia, Samuel HPP, was built. Besides this, other dams were built in the Jamari River and its tributaries, however, the available information in the scientific literature about the ichthyofaunistic diversity of this basin is rare. This work aims to provide an ichthyofaunistic inventory in a region of the Jamari river basin, in the State of Rondônia, where three small hydropower plants (SHPs) were implemented. The ichthyofauna was sampled in 16 expeditions between August 2015 and December 2018. Gill nets and seine nets were used with different meshes, as well as longlines and cast nets at different times of the day. Additionally, 81 INPA lots of species from the Samuel HPP area of influence were reanalyzed. Fish were identified according to the specialized literature, as well as in consultations with experts of various taxonomic groups. Voucher specimens of the species were cataloged and deposited in the ichthyological collection of the Núcleo de Pesquisas em Limnologia, Ictiologia e Aquicultura (Nupélia) of the Universidade Estadual de Maringá. A total of 230 species were recorded, of which 22 were putative new species, 117 were added to the Jamari River basin and 28 to the Madeira River basin. The continuation of the studies in this section of the Jamari river basin is fundamental for analysis of local impact due to the presence of dams. Moreover, the addition of putative new species to the Madeira River basin indicates gaps in the knowledge of Neotropical ichthyofauna.</div
Going Beyond Counting First Authors in Author Co-citation Analysis
No full textThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
LiDAR survey on 224.99 hectares in Jamari, Rondônia, Brasil in 2015
No full textThe LiDAR data Floresta Nacional do Jamari (JAM_A06_2015_LiDAR) refers to the survey carried out in Jamari National Forest, Rondônia state, Brazil, as part of the Brazilian Forest Service monitoring program. The partnership between the Brazilian Forest Service and the Brazilian Agricultural Research Corporation (Embrapa) has made available high accuracy LiDAR data for the development of new methodologies and to expand the knowledge about forest management in concession areas.
This dataset contains:
a. Classified LAS formatted point cloud data – compressed LAS files: LAZ format (vendor delivered);
b. Digital Terrain Model (vendor delivered);
c. Map of LiDAR coverage area and block boundaries;
“Data were acquired by the Sustainable Landscapes Brazil project supported by the Brazilian Agricultural Research Corporation (Embrapa), the US Forest Service, USAID and the US Department of State."Os dados LiDAR Floresta Nacional do Jamari (JAM_A06_2015_LiDAR) referem-se ao levantamento realizado na Floresta Nacional do Jamari, estado de Rondônia, Brasil, como parte do programa de monitoramento do Serviço Florestal Brasileiro. A parceria entre o Serviço Florestal Brasileiro e a Empresa Brasileira de Pesquisa Agropecuária (Embrapa) tem disponibilizado dados LiDAR de alta precisão para o desenvolvimento de novas metodologias e ampliação do conhecimento sobre manejo florestal em áreas de concessão.
Este conjunto de dados contém:
a. Dados de nuvem de pontos formatados em LAS classificados – arquivos LAS compactados: formato LAZ (entregue pelo fornecedor);
b. Modelo Digital de Terreno (entregue pelo fornecedor);
c. Mapa da área de cobertura LiDAR e limites dos blocos;
“Os dados foram adquiridos pelo projeto Paisagens Sustentáveis Brasil, apoiado pela Empresa Brasileira de Pesquisa Agropecuária (Embrapa), Serviço Florestal dos EUA, USAID e Departamento de Estado dos EUA.
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