Evaluation of the Inter-repair Operation Period of Electric Submersible Pump Units

In recent years, in the oil and gas industry of Azerbaijan, the use of electric submersible pumps (SEP) as one of the effective way to increase the level of production of well products. Currently, electric centrifugal pumping units (ECPU) are widely used both on land and in offshore fields. Currently, a total of about 15 % of SOCAR\u27s oil wells are produced using electric submersible pumping units.ECPU effectiveness is largely determined by both the period of their operation and the frequency of repair and restoration work.It is established that the use of ECPUs contributes to an increase in the service life of equipment and the effectiveness of a mechanized method of oil production. To assess the benefits of the latter, the most important factor is the inter-repair period (Tir) of the equipment.Existing methods for determining the inter-repair period of oilfield equipment are accompanied by large errors, which significantly reduce their reliability.In this regard, the article is tasked with developing a more practical and reliable method for determining the inter-repair period, where the point of change in the nature of the failure rate is adopted as the determining paramete

Desas Desus Informasi Haji dalam Hubungannya dengan Daftar Tunggu Bagi Calon Jemaah Haji di Kabupaten Gowa

Rumors information Hajj often bring news is not true, circulated from mouth to mouth very quickly and circulated like a snowball throws prospective pilgrims. This research aims to: Knowing the form of rumors circulating among Hajj information prospective hajj congregation waiting list, Knowing acceptance of rumor information of hajj for potential congregation waiting list, find out how patterns of rumor information of hajj for hajj congregation waiting list candidates in Gowa region. This research used a descriptive approach with case studies as a focus of analysis. The technique of collecting data through in-depth interviews, the study of librarianship, observation and physical devices. As for the data analysis done qualitatively-verifikatif with data validation using the technique of triangulation of sources. The research showed the form of the rumor for hajj information related to the waiting list for candidates in Gowa region is a "add cost" If you want to quickly set off without having to wait for the queue number portion. These rumors circulating through the interaction of the mouth to the mouth, no clear source originally, spread information quickly and spread like a snowball. The reception of rumor information of Hajj "add cost" taken by the informant because the rumor information derived from competent and credible Communicator, the proximity to the recipient, as well as have motivation and self-actualization, already impatient want to leave for the Hajj so there is involvement of stimulus ego (ego-involvement) in the reception of the rumor information. Hajj congregation candidate ultimately tend to chase down rumors of information that can be sent out quickly without having to wait for the queue number portion of the Hajj. As for the pattern of the rumors spread of tissue imaged Hajj information cluster model (cluster), where the source of the dominant role to take in the dissemination of information because there are rumors of homophily, that is in common interests and goals

Perlindungan Hukum Bagi Konsumen dalam Perjanjian Baku Jual Beli Perumahan dengan Pihak Pengembang di Bali

The rapid population growth makes the need for homes also increase. There are many emerging developer companies that offer home that could be obtained on credit. Real Estate Developer parties usually make an agreement with consumers in the form of standard contract, so that the consumers here have no bargaining power but to accept what is specified by the developer. This causes consumer to have less legal protection as opposed to what is contained in the provisions of Law No. 8 of 1999 concerning Consumer Protection. The problem faced is how the position of the buyers as consumers in the purchase of standard agreement of housing, as well as how the legal protection that can be provided to the consumer in the standard housing sale and purchase agreement with developers in Bali. This research is empirical legal research whose objects of study are the terms and provisions regarding the enforcement or implementation of normative law (codification, law or contract) is in action / in abstracto on any legal events that occur in the community (in concreto). The data source used in this study is primary data and secondary data. The results of this study indicate that the Status of the buyer as a consumer in the standard housing sale and purchase agreement has a weaker position compared to the business party (developer), this is because the purchase agreement offered by the business is made in the standard contract format so that consumers do not have bargaining power over what is contained in the clauses of the home purchase agreement. Legal protection that can be provided to the consumer in standard housing sale and purchase agreement with developers in Bali, namely if in the field there is a breach of the provisions set out in the Consumer Protection Act, a developer as the party carrying out the business can legally be sued by consumers as parties who feel aggrieved, then other measures are that a developer must also adjust the standard clause in the purchase and sale agreement that it offers is still at odds with this Law

CP-odd Phase Correlations and Electric Dipole Moments

We revisit the constraints imposed by electric dipole moments (EDMs) of nucleons and heavy atoms on new CP-violating sources within supersymmetric theories. We point out that certain two-loop renormalization group corrections induce significant mixing between the basis-invariant CP-odd phases. In the framework of the constrained minimal supersymmetric standard model (CMSSM), the CP-odd invariant related to the soft trilinear A-phase at the GUT scale, theta_A, induces non-trivial and distinct CP-odd phases for the three gaugino masses at the weak scale. The latter give one-loop contributions to EDMs enhanced by tan beta, and can provide the dominant contribution to the electron EDM induced by theta_A. We perform a detailed analysis of the EDM constraints within the CMSSM, exhibiting the reach, in terms of sparticle spectra, which may be obtained assuming generic phases, as well as the limits on the CP-odd phases for some specific parameter points where detailed phenomenological studies are available. We also illustrate how this reach will expand with results from the next generation of experiments which are currently in development.Comment: 31 pages, 21 eps figures; v2: additional remarks on 2-loop threshold corrections and references added; v3: typos corrected, to appear in Phys. Rev.

Evaluation of Skew-planar Antenna for UAV Communication at 2.4 GHz Band

Skew-planar antenna is suitable for unmanned aerial vehicles (UAVs) since it has circular polarization (avoiding polarization-mismatched), omnidirectional radiation pattern (low pointing loss) thus comply with maneuver angles of UAV, and also small size. Investigation with electromagnetic simulations shows that tilt angle and coaxial length are the most sensitive parameters. Modified design with 55° tilt angle (original design: 45°) and 100 mm coaxial length (original: 60 mm) potentially provides wider bandwidth (400 MHz vs. 290 MHz), better impedance-matched (|S11|: -47.1 dB vs. -13.6 dB), and better gain (1.98 dBi vs 1.61 dBi). The antenna is predicted capable to support service distance of 3 km in 2.4 GHz band if used with communication module with 18 dBm transmit power and -100 dBm receiver sensitivity. Therefore, the modified antenna is suitable to be applied in UAV

Analysis of the Impact of Deforestation on Agricultural Productivity in Nigeria: An Error Correction Modeling Approach

This study analyzed the impacts of deforestation on agricultural productivity in Nigeria. The specific objectives were to assess the trend of deforestation and the impact of deforestation on agricultural productivity. Time series data on all the variables in the study spanning from 1975 to 2010 were used.  Descriptive statistic and Error Correction Model were the analytical techniques used for the study. The Unit root test results reveal that all the variables of deforestation, agricultural productivity, average rainfall and number of tractors were found to be non-stationary at 5% level but stationary at first difference, which give way for long-run co-integration. Analysis of Error Correction Model (ECM) results indicated an inverse long- run relationship between deforestation and agricultural productivity. The result reveals that 1% increase in deforestation will result in 1.7% decrease in agricultural productivity. Average rainfall and number of tractors show a long-run positive relationship with agricultural productivity. With 1% increase in average rainfall and number of tractors, agricultural productivity will increase by 0.5% and 2.4%, respectively. The result of the short- run analysis shows positive relationship between previous year’s agricultural productivity and rainfall on current agricultural productivity with elasticity of 0.9 and 0.2, while deforestation portrayed a negative effect on agricultural productivity with elasticity of -0.7. Error Correction Model shows a permanent impact of deforestation and agricultural productivity. Policies should gear up towards finding alternative sources of energy, while unnecessary clearing of forests should be legislated against to minimized causes of deforestation and its impacts on agricultural productivity. Keywords: Deforestation, Productivity, Error- correction and Nigeri

Effect of Quality Service Indicators on the Attitude of Farmers towards Demand-driven Extension Services in Niger State, Nigeria

This study examined the effect of quality service indicators on the attitude of farmers towards demand-driven extension services in Niger State, Nigeria. Primary data for the study were collected through a cross-sectional survey using interview schedule. Data collected were analyzed using descriptive statistics and multiple regression models. Result of the study shows that almost 86.0% of the respondents acquired formal education. With respect to the respondents’ attitude towards demand-driven extension services, 98.9% showed favourable attitude while 1.1% were neutral. Findings further revealed that quality service indicators of content accuracy, relevance, timeliness and effectiveness of extension services had significant positive effect on farmer’s attitude towards demand-driven extension services (P<0.05), while efficiency of extension services had significant negative effect on farmers’ attitude towards demand-driven extension services. It was therefore recommended that the extension service providers should always strive to provide high quality services to ensure and sustain farmers’ favourable attitude towards demand-driven extension services. It was also suggested that government policy should be created to favour demand-driven extension service providers to function where they have the comparative advantage in providing farmers with relevant extension services. Keywords: farmers, demand driven extension, attitude, qualit

Effect of Nanosilica on Mechanical and Microstructural Properties of Cement Mortar

Recently, nanomaterials (such as nanosilica) are receiving special attention because of their ability to improve the performance of concrete compared with traditional mineral admixtures. In this work, a number of specimens were prepared to study the behavior of cement mortar containing nanosilica. The cement replacement by nanosilica of 3% and 5% by weight of cement was used. The mechanical and microstructural properties of the specimens were investigated. An experimental result from literature was utilized to predict the transport of chloride into reinforced concrete structures modified with nanosilica using COMSOL multiphysics commercial package. The experimental results show that cement mortars containing nanosilica have higher strength than ordinary portland cement mortars. Also, the SEM images confirmed the improvement in the microstructure of mortar with nanosilica

All unitary cubic curvature gravities in D dimensions

We construct all the unitary cubic curvature gravity theories built on the contractions of the Riemann tensor in D -dimensional (anti)-de Sitter spacetimes. Our construction is based on finding the equivalent quadratic action for the general cubic curvature theory and imposing ghost and tachyon freedom, which greatly simplifies the highly complicated problem of finding the propagator of cubic curvature theories in constant curvature backgrounds. To carry out the procedure we have also classified all the unitary quadratic models. We use our general results to study the recently found cubic curvature theories using different techniques and the string generated cubic curvature gravity model. We also study the scattering in critical gravity and give its cubic curvature extensions.Comment: 24 pages, 1 figure, v2: A subsection on cubic curvature extensions of critical gravity is added, v3: The part regarding critical gravity is revised. Version to appear in Class. Quant. Gra

Soil Fertility Management, a Tool for Sustainable Disease and Weed Control in Sub-Saharan Africa: A Review

Agro-ecosystem health is built on habitat manipulation and fertility enhancement. Similarly, plant nutrient levels altered by fertilization practices can expose crop plants to pests. In addition, diseases, weeds and other pests are principal agricultural losses all over the world. This is particularly devastating particularly in the developing nations of Sub-Saharan Africa, especially Nigeria. Reduction in these losses will not only improve agricultural production but will enhance food security and economic well-being of society. Sole use of synthetic chemicals is economically not a viable option and does not encourage environmental sustainability while land expansion is equally elusive due to urbanization and different forms of development and not environmentally friendly. The most viable and practicable option is integration of different fertility management alternatives that could produce crops on a sustainable bases while ensuring the safety and sustainability of the environment. Integrated Soil fertility Management (ISFM) has proved to be a promising approach to fertility management and sustainable environment. It could be adopted as it provides the needed nutrients for plants, reduce weeds and disease incidences while safeguarding the environment