370 research outputs found
Whatever It Takes: How and When Supervisor Bottom-Line Mentality Motivates Employee Contributions in the Workplace
Given that many organizations are competitive and finance centered, organizational leaders may lead with a primary focus on bottom-line attainment, such that they are perceived by their subordinates as having a bottom-line mentality (BLM) that entails pursuing bottom-line outcomes above all else. Yet, the field is limited in understanding why such a leadership approach affects employees’ positive and negative contributions in the workplace. Drawing on social exchange theory, we theorize that supervisors high in BLM can influence employees’ felt obligation toward the bottom line, which in turn can influence employees’ task performance and unethical pro-organizational behavior (UPB). We also examine employee ambition as a moderator of this process. Using three-wave, multisource data collected from the financial services industry, our results revealed that high-BLM supervisors elevate employee task performance as well as UPB by motivating employees’ felt obligation toward the bottom line. Furthermore, we found that employee ambition served as a first-stage moderator, such that the mediated relationships were stronger when employee ambition was high as opposed to low. Our findings break away from the dominant dysfunctional view of BLM and provide a more balanced view of this mentality
Towards Ad-Hoc GPU Acceleration Of Parallel Eigensystem Computations
This paper explores the early implementation of high- performance routines for the solution of multiple large Hermitian eigenvector and eigenvalue systems on a Graphics Processing Unit (GPU). We report a perfor- mance increase of up to two orders of magnitude over the original EISPACK routines with a NVIDIA Tesla C2050 GPU, potentially allowing an order of magnitude in- crease in the complexity or resolution of a neutron scat- tering modeling application
Mapping of Water Distribution Network using GIS Technology in Bauchi Metropolis, Nigeria
Increase in Population as well as demand for portable pipe-borne water in most of the cities of developing countries and the activities of the people greatly affect the pipes networks quietly laid beneath the ground. Locating such pipes and the features installed in them has been a task to tackle. Therefore to ensure proper surveillance and monitoring of laid down pipe around the metropolis need to be properly guided with modern technology like the use of Geographic Information Technology. Hence, to solve these problems analogue data was acquired from the Bauchi State Water Board (BSWB) and converted to digital map (Raster format). (GPS) coordinate was used to locate pipes within the network, the nodes, valves, water hydrants, and busters). Finally, the position of each of the identified features within the network was obtained and recorded in the events table. Digital map of water distribution network of the metropolis was produced and queries were raised while the node valves or pipes underground were easily located using GPS coordinates by navigating from the surface. The study recommends the use of GIS as a decision making tool for municipal water system authorizes or agencies for proper management and evaluation of their installations. Keywords; GIS, GPS Coordinates, ArcGIS, Bauchi Metropolis and Water distribution networ
Modification of Thermal Hydraulic Transient Models for the Miniature Neutron Source Reactor
A modified Miniature Neutron Source Reactor (MNSR) model dealing with transient thermal hydraulic problem is presented. The model based on lumped parameter method is adopted in this work to numerically solve a system of coupled algebraic and differential equations governing heat transfer in MNSR, using MATLAB solver for variable order method in stiff differential equations and Differential-Algebraic equations, coupled with Maple soft. The simulated results obtained from the model were generally in agreement when compared with reactor operation data recorded from 0 to 270 minutes during experiments. Radiating energy of Fuel and clad and heat transferred at the gap or clearance were taken in to account. Fuel and clad temperatures as well as various temperatures at different sections of the reactor were predicted with the model, in addition to the effect of the installed chiller on the reactor coolant
Morphometric Analysis of Gubi Dam Basin for Flood Vulnerability Using Shuttle Radar Topographic Mission (STRM)
This paper examines the relationship between the different morphometric parameters and characters of the drainage terrain. To do that, Gubi dam basin in Bauchi state, Nigeria drainage characteristics was delineated using Shuttle Radar Topographic Mission (SRTM) data. The Aspect, Drainage, and Slope maps were prepared using ArcGIS 10.2.1 software. The Gubi Dam is fifth-order stream that exhibits dendritic to sub-dendritic pattern. The trails drainage patterns are also observed in some areas of the basin, which may be due to the effect of regional tectonics. The mean bifurcation ratio is 1.47 showing normal basin which is somehow controlled by structural disturbances. Drainage density (0.25) shows very coarse drainage texture also having positive correlation with stream frequency. The elongation ratio is 0.08 along with circulatory ratio (0.21) shows elongated nature of the basin. The low values of drainage density and stream frequency imply that surface run-off is not quickly removed from the basin, making it susceptible to flooding and gully have very little effect on the extent to which the surface has been lowered by agents of denudation. Keywords: Morphometric, Flood, Shuttle, Radar, Topographic, Mission DOI: 10.7176/JEES/10-3-08 Publication date:March 31st 202
The Way forward for Community-Based Health Insurance Scheme in Funding Health Care among the Rural Communities of Sokoto State, Nigeria
Health care financing in most of Sub-Saharan Africa is based on out-of-pocket payment from the rural dwellers.”This out-of-pocket payment has caused a lot of health troubles such as premature deaths, maternal problems, deficiencies in health issues in Sub Sahara countries. This report examines issues pertaining to health financing in Nigerian rural areas in order to encourage people in SSA to implement “Community-Based Health Insurance Scheme in the rural regions.” “It’s been significant because it offers a chance for the citizenry to be out of poverty as a result of high money paid whenever they are assessing health care through out-of-pocket payment at the point of service delivery. “This schema is a raw area of health financing in the developing countries supported by the World Health Organization (WHO), World Bank (WB) and the International Labor Organization (ILO) among others.” Few of the SSA countries like Ghana, Mali, and Burkina Faso are doing well using the scheme to finance health care delivery in the rural regions. “In Nigeria, this concept of community-based health insurance plan is a new development. Thus, an attempt should be attained to create consciousness about this commendable project.” The management of the CBHIS should focus on the rural dwellers on one hand, and government should provide enabling laws on the other. Keywords: Health Financing, Out-of-Pocket, Sokoto, Community-Based Health Insuranc
Comparison of ascorbic acid content of some selected fresh and dried tropical vegetables
Ascorbic acid (Vitamin C) was determined in four different tropical vegetables (Cucumber, Cabbage, Spinach and Tomatoes) sourced from Yankaba market, Kano state. Colorimetric method was used for the determination. The ascorbic acid content in the cucumber, cabbage, spinach and tomatoes ranged from 51.67mgL-1 to 395.45mgL-1. Tomatoes were found to have the highest concentrations (395.45mgL-1) while cucumber has the lowest (181.82mgL-1 for the fresh and 60.00mgL-1 and 51.67mgL-1 respectively) for the dried vegetables. The deficiency of ascorbic acid is believed to result in scurvy, a disease characterized by spongy and sore gum, loose teeth, anaemia, swollen joint, fragile blood vessels. Frequent intake, therefore of these vegetables rich in vitamin C (especially tomatoes) will help prevent these problems in human being. This indicated that although the vegetables are rich in ascorbic acid content, their dried forms have grossly inadequate amount to ensure the provision of required dietary intake (RDI) of vitamin C for humans.Keywords: Ascorbic acid, Comparison, Vegetables, Vitamin
Multiclass Sequential Feature Selection and Classification Method for Genomic Data
This paper presents an efficient multiclass sequential feature selection and classification (mk-SS) method using gene expression signatures. The development of this method employs 10-fold cross-validation to ensure stability. The efficiency of this method is assessed through the misclassification error rate and some other performance measures. The performances of the mk-SS were compared with the classification results of the Support Vector Machines (SVM) over five published multiclass microarray datasets. The results showed that the mk-SS method efficiently selects the informative gene biomarkers for proper classification of the biological groups of the tissue samples. This method competes favourably with SVM in terms of prediction accuracy while it outperforms the SVM in 80% of cases considered. The quality of the features selected by mk-SS algorithm was validated by hybridizing the feature selection scheme of the mk-SS into the standard SVM algorithm which significantly improves the predictive power of the standard SVM method. This work has shown that classification of various cancer type using gene expression profiles is feasible especially when the endpoints are of multi-category. Keywords: k-SS, mk-SS, Support Vector Machines, Microarray, Misclassification error rat
Assessment of Underground Water Contamination Due to Early Coal Mining Activities in Nigeria
This paper examines the level of mining activities impairment on underground water quality. Five samples were obtained three (3) from bore hole waste, one from open well and one from nearby stream. The samples obtained were analyzed based on Physical, Biological and Chemical Parameters. The result shows most of high concentration of chemical elements impairing on water quality as a result of mining activities such as Nitrate, Chloride, Phosphate, Cyanide, Fluoride, Iron, Manganese etc. Additionally the bacteriological analysis of these water samples revealed the concentration off e coli bacteria in the most boreholes, well, and the stream. The paper concluded that even though borehole were provided to augment the water supply for communities consumption but consideration was not given to streams where waste water from the mining site are normally drained into because it is use by plant and animals. There is therefore the need to treat the water before discharge into the stream. Keywords: Contamination, Mining, Parameters, Samples, Underground water
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