Publish in OALib Journal

ISSN: 2333-9721

APC: Only $99


Any time

3 ( 1 )

2019 ( 47 )

2018 ( 64 )

2017 ( 85 )

Custom range...

Search Results: 1 - 10 of 33117 matches for " Wellington Antonio;Haji "
All listed articles are free for downloading (OA Articles)
Page 1 /33117
Display every page Item
Efeito do controle químico da mosca-branca na incidência do vírus-do-mosaico-dourado e na produtividade do feijoeiro
Barbosa, Flávia Rabelo;Siqueira, Katia Maria Medeiros de;Souza, Eduardo Alves de;Moreira, Wellington Antonio;Haji, Francisca Nemaura Pedrosa;Alencar, José Adalberto de;
Pesquisa Agropecuária Brasileira , 2002, DOI: 10.1590/S0100-204X2002000600018
Abstract: the objective of this work was to evaluate the effect of insecticides on the control of whitefly (bemisia argentifolii bellows & perring, 1994), on golden mosaic virus incidence and on common bean yield. seed treatment with the insecticides imidachloroprid or thiamethoxam followed by insecticide sprays at weekly internals were used. the experiment was conducted in a randomized complete block design in an irrigated area in petrolina, pe, brazil, with five treatments and four replicates. the chemical control decreased significantly the number of eggs, nymphs and adults, and also the percentage of infection by the golden mosaic virus in the bean crop. grain yields for chemical treatments in the tilled plots ranged from 1,930 to 2,405 kg/ha, while the control yielded 1,490 kg/ha. there were no significant differences for number of pods per plant and for 100-seed weight.
Nível de dano, plantas invasoras hospedeiras, inimigos naturais e controle do psilídeo da goiabeira (Triozoida sp.) no submédio S?o Francisco
Barbosa, Flávia Rabelo;Ferreira, Rachel Gon?alves;Kiill, Lúcia Helena Piedade;Souza, Eduardo Alves de;Moreira, Wellington Antonio;Alencar, José Adalberto de;Haji, Francisca Nemaura Pedrosa;
Revista Brasileira de Fruticultura , 2003, DOI: 10.1590/S0100-29452003000300016
Abstract: this study was conducted to increment the integrated management of triozoida sp. (hemiptera, psylliidae) in guava plants at the s?o francisco river valley. the damage level, weed hosts, selectivity and effect of the thiamethoxam 10gr and 250wg in the control of psylliidae were evaluated. the experiment was carried out in an irrigated area, at petrolina, pernambuco, in a randomized block design with four replications. treatments consisted of: 1) thiamethoxam 10gr applied on soil; 2) thiamethoxam 250wg sprayed weekly; 3) thiamethoxam 10gr applied on soil + thiamethoxam 250wg sprayed weekly; 4; 5; 6) thiamethoxam 250wg sprayed when 10, 20 and 30% of infested branches were reached, respectively; 7; 8; 9) thiamethoxam 10gr applied on soil + thiamethoxam 250wg sprayed when 10, 20 and 30% of infested branches were reached, respectively; and 10) control (no insecticide). the percentage of infested branches in the control treatment differed significantly from the treatments 2 (2.8%), 3 (4.3%), 4 (19.7%), 7 (13.4%), 8 (14.5%) and 9 (15.0%). when thiamethoxam was used, the population reduction of natural enemies ranged from 12.5 to 39.6%, corresponding, in the selective scale, to grades (1 = non offensive (< 25%), 2 = not very toxic (25-50%). number and weight of fruits were similar in all the treatments. fifty one weed species and no host of triozoida sp. were found.
Asymptotic Stability of Gaver’s Parallel System Attended by a Cold Standby Unit and a Repairman with Multiple Vacations  [PDF]
Abdukerim Haji
World Journal of Engineering and Technology (WJET) , 2015, DOI: 10.4236/wjet.2015.33C041

We investigate Gaver’s parallel system attended by a cold standby unit and a repairman with multiple vacations. By analysing the spectral distribution of the system operator and taking into account the irreducibility of the semigroup generated by the system operator we prove that the dynamic solution converges strongly to the steady state solution. Thus we obtain asymptotic stability of the dynamic solution of the system.

Enhancing Tourism Industry through Community Participation: A Strategy for Poverty Reduction in Zanzibar, Tanzania  [PDF]
Wakuru Magigi, Haji Ramadhani
Journal of Environmental Protection (JEP) , 2013, DOI: 10.4236/jep.2013.410127

This study centred on understanding how local communities participate in tourism industry in Bwejuu Village in Zanzibar and the benefit they are getting towards poverty reduction. Specifically, the study identifies tourism industry activities and how local communities participate in improving their livelihoods, find out factors influencing local community participation in tourism sector and lastly, and identify contribution of tourism sector in enhancing local communities’ livelihoods. Interviews, observations, documentary reviews and photograph taking are methods employed to the case. The study result shows that tourist hotels, beach, seaweed, historical building archives, diving and snorkeling, sailing boats, coral reefs and lagoons as well as mangrove swamps are some tourist activities in the settlement. Both men and women involves in the tourist activities. The tourist activities noted contributing to local communities’ livelihoods in terms of employment creation, leisure, income generation, increased government revenues, schooling, health, house construction and household consumption. However, language barriers, inadequate experience of operators, poor education and training, culture, commitment of actors and poverty level are some constraints highlighted. Following these challenges, the study recommends that the government in collaboration with other development partners interested in tourism industry development may opt to ensure capacity building to local communities and tourist operators in Zanzibar, to review the policy and legislations in place as well as to encourage stakeholder involvement in Tourism sectors as prospects for its development. In conclusion, it can be asserted that if tourism developers believe that local communities will be satisfied if they are used as labourers instead of being ownership of tourism activities. Thus, there is an urgent need to enhance participation and involvement of local communities in tourism sector. These communities must be actively

Processing Malaysian Indigenous Languages: A Focus on Phonology and Grammar  [PDF]
Asmah Haji Omar
Open Journal of Modern Linguistics (OJML) , 2014, DOI: 10.4236/ojml.2014.45063
Abstract: Malaysian indigenous languages are of two entirely different families: Austronesian and Austroasiatic. The former consists of Malay and all the languages of Sabah and Sarawak, while the latter the aboriginal languages found only in Peninsular Malaysia. Except for Malay and a few more in Sabah and Sarawak, most of these languages have not been put into writing. This means that no writing system has been ascribed to them, despite the fact that quite a number have been described in terms of phonology, morphology and syntax. From the descriptions available, one gets a picture of their typologies and systems for processing purposes. Concerning typology, there is not much difference between the two families as far as phonemic inventories go, but there are differences in the phonological structures of the syllable and the word. As for morphology, the Austronesian languages are agglutinative, while the Austroasiatic ones are isolative. There is also a difference in the syntactical status of the word, where the former has the two categories of the full word and the particle, and the latter only the full word. This last mentioned difference leads to a divergence between them in the types of phrase, the clause, and the complex sentence. Natural language processing (NLP) is a methodology which is now being applied in the analysis of various aspects of languages. This paper discusses the constraints faced by most of the Malaysian indigenous languages in the application of this methodology.
Well-Posedness of Gaver’s Parallel System Attended by a Cold Standby Unit and a Repairman with Multiple Vacations  [PDF]
Abdukerim Haji, Bilikiz Yunus
Journal of Applied Mathematics and Physics (JAMP) , 2015, DOI: 10.4236/jamp.2015.37101

We investigate Gaver’s parallel system attended by a cold standby unit and a repairman with multiple vacations. By using C0-semigroup theory of linear operators in the functional analysis, we prove well-posedness and the existence of the unique positive dynamic solution of the system.

Well-Posedness of an N-Unit Series System with Finite Number of Vacations  [PDF]
Abdugeni Osman, Abdukerim Haji
Journal of Applied Mathematics and Physics (JAMP) , 2016, DOI: 10.4236/jamp.2016.48169
We investigate the solution of an N-unit series system with finite number of vacations. By using C0-semigroup theory of linear operators, we prove well-posedness and the existence of the unique positive dynamic solution of the system.
Asymptotic Stability of a Series-Parallel Repairable System Consisting of Three-Unit with Multiple Vacations of a Repairman  [PDF]
Tursunjan Keyim, Abdukerim Haji
Journal of Applied Mathematics and Physics (JAMP) , 2017, DOI: 10.4236/jamp.2017.51018
Abstract: We study a series-parallel repairable system consisting of three units with multiple vacations of a repairman. We first show that all points on the imaginary axis except zero belong to the resolvent set of the operator and zero is an eigenvalue of the operator, and then we prove that the semigroup generated by the operator is irreducible. By combining these results with our previous result we deduce that the dynamic solution of the system converges strongly to its steady-state solution. Thus we obtain asymptotic stability of the dynamic solution of the system.
Spatio-Temporal Analysis on Urban Traffic Accidents: A Case Study of Tehran City, Iran  [PDF]
Niloofar Haji Mirza Aghasi
Journal of Geographic Information System (JGIS) , 2018, DOI: 10.4236/jgis.2018.105032
Abstract: Urban Traffic Accidents (UTAs) may be seen as discrete events, localized in space and time. UTAs rates all over the world show great disparity, especially between developed and developing countries. Today, the most negative results of urban transportation are UTAs with many side effects such as injuries and loss of lives. UTAs lead to injury, death, disability and pain, loss of productivity, grief, social and mental problems. Proper and deep study and planning can enhance transport and driving safety and reduce number and severity of accidents. Traffic safety crises, death, damage and costs resulting from road UTAs are some of the most important public health and police organization challenges. In particular, UTA’s victims are often people who are aged 15 - 44 years old in Iran, and UTAs are the second cause of death after heart disease in Tehran. UTAs’ statistics in Tehran reveal a serious problem with significant fatality and injury rate. This study aims to identify the spatial pattern of UTAs in the city of Tehran in order to find the causes and consequences as well as the temporal and spatial or spatio-temporal variation of accidents. The relationship between the space and time of daily activities that generate urban daily trips and UTA, is examined in Tehran city for 2010 to 2011. The analysis is based on different primary and secondary data sources, which include locations of accidents and different attributes such as date, reason, kind, etc. Based on the data analysis, the study also attempted to show some light on the major causes, factors and types of accidents in order to identify the problem and suggest appropriate suggestions which reduce UTAs. As this study considered different factors of UTA, urban environment, land use, population, human activities and culture point considered as the most important pillars of this study. In order to understand knowledge, culture and attitudes of drivers towards traffic regulations, questionnaires were distributed to 1500 drivers in the study area to gather data about the drivers’ knowledge, beliefs, attitudes, and behaviors and 1177 of them returned. The results express that culture and knowledge of drivers have direct effects on localizing accidents. Furthermore, the concentration of educational, commercial and cultural activities that make up a large number of urban trips and urban dynamics, road usage, and time are among the main considerations of this study. The relationships between population, land use and dynamic patterns of city which constitute the urban structure, are used to establish a link
Application of GIS for Urban Traffic Accidents: A Critical Review  [PDF]
Niloofar Haji Mirza Aghasi
Journal of Geographic Information System (JGIS) , 2019, DOI: 10.4236/jgis.2019.111007
Abstract: The analysis of huge data is a complex task that cannot be executed without a proper system. Geographic information systems (GISs) have been used by many transportation agencies and police departments to analyze and manage urban traffic accident (UTA) data and for decision making aimed at decreasing accident rates and increasing safety. The exact location of accidents and environmental characteristics must be analyzed as UTAs occur in specific locations with specific characteristics. ArcGIS software is the best choice for obtaining meaningful information and analysis results from UTAs in an observational time span. GIS technology is a fundamental element for investigating and evaluating the complex spatial relationship among different components and urban traffic accident is one of them. Micro or macro analysis of UTAs through the spatial prospective within the geographical environment and urban structure can make a deep micro understanding of UTAs patterns in addition to assisting in decision making. UTAs can be considered complex events that occur in two aspects which are spatial and temporal or space and time in other word. A GIS can integrate more than two different and unrelated databases. The evaluation among different spatial objects in a geographical environment and associated factors in urban structure which are included but not limited to land use category, road transportation network qualification, population density, etc., is one of the GIS specification. Traffic safety organizations and UTA researchers use GISs as a key technology to support their research and operational needs. In particular, GIS-T is an often-used GIS application used for planning and decision-making in transportation.
Page 1 /33117
Display every page Item

Copyright © 2008-2017 Open Access Library. All rights reserved.