scholarly journals Impact of Procurement Methods and Procurement Requirements on Cost Over-run of Public Building Projects in Uganda

2021 ◽  
Vol 4 (1) ◽  
Author(s):  
Julius Caesar Kwio-Tamale ◽  
Nathan Kibwami ◽  
Godfrey Mwesige
Keyword(s):  
The Novel ◽  
Building Projects ◽  
Bivariate Correlation ◽  
Margin Of Error ◽  
Bond Insurance ◽  
Additional Costs ◽  
Performance Bond ◽  
And Performance ◽  
Level Of Significance ◽  
Procurement Method

Cost over-run in building projects is endemic and routinely increases construction cost to as high as 52% of contract sums in Uganda. The consequence of this is underachievement of investment objectives due to additional costs to complete projects. This research investigated how procurement requirements and procurement methods combine to determine cost over-run of building projects. Procurement requirements of bid time, performance bond, insurance, workload and experience of contractors were investigated within contexts of procurement methods of open domestic bidding, restricted domestic bidding, open international bidding, restricted international bidding and requests for quotations. Purposive and snow-ball sampling were used in identifying construction professionals, consultants and contractors of building projects with cost over-runs. Correlation and independence of procurement requirements on 37 cost over-run datasets were analysed by Spearman's bivariate correlation co-efficient at 5% level of significance and variable inflationary factor of less than 5 respectively. Bid time and performance bond were found to reduce cost over-run of building projects most followed by workload and experience. Insurance increased cost over-run marginally. The novel contribution of this research is a model that explains 63% of cost over-run with 9% margin of error. Variants of the model, one for each procurement method is presented.

MODEL KUANTITATIF MANAJEMEN STRES KERJA DAN MOTIVASI UNTUK MENINGKATKAN KINERJA PETUGAS REKAM MEDIS DI RS ORTOPEDI PROF. DR. R. SOEHARSO SURAKARTA

2016 ◽  
Vol 5 (2) ◽  
pp. 150-156
Author(s):  
Laili Rahmatul Ilmi
Keyword(s):  
Stress Management ◽  
Work Stress ◽  
Work Performance ◽  
Work Motivation ◽  
Cross Sectional ◽  
Staff Performance ◽  
Bivariate Correlation ◽  
And Performance ◽  
The Relationship ◽  
Management Work

Background: Workload may indirectly cause stress. The ability to manage work stress may affect staff’s motivation and performance. The staff performance will affect decision-making in improving the service quality. Objective: This study aimed to analyze the relationship between stress management, work motivation and work performance. Method: This was an analytic observational study with a cross sectional approach. A sample of 19 medical record staff, working at Prof. Dr. R Soeharso orthopedic hospital Surakarta, were selected for this study. A set of questionnaires were developed and administered to measure stress management, work motivation and work performance. Data were then analyzed with a bivariate correlation analysis. Results: There were statistically significant correlations between work stress management, work motivation and work performance. The ability to manage stress positively increased the motivation (r= 0,56; p= 0,013), as well as the work performance (r= 0,49; p= 0,036). Moreover, a higher motivation will lead to a higher performance (r= 0,42; p= 0,071). Conclusion: There were positive relationships between work stress management, work motivation and work performance. Key words: work stress management, motivation, performance.

scholarly journals Does Hyperoxia Restrict Pyrenean Rock Lizards Iberolacerta bonnali to High Elevations?

Diversity ◽  
2021 ◽  
Vol 13 (5) ◽  
pp. 200
Author(s):  
Eric J. Gangloff ◽  
Sierra Spears ◽  
Laura Kouyoumdjian ◽  
Ciara Pettit ◽  
Fabien Aubret
Keyword(s):  
High Elevation ◽  
Conservation Strategy ◽  
The Novel ◽  
Thermal Physiology ◽  
Treatment Groups ◽  
Thermal Performance Curve ◽  
And Performance ◽  
Thermal Preferences ◽  
High Elevations ◽  
Intense Radiation

Ectothermic animals living at high elevation often face interacting challenges, including temperature extremes, intense radiation, and hypoxia. While high-elevation specialists have developed strategies to withstand these constraints, the factors preventing downslope migration are not always well understood. As mean temperatures continue to rise and climate patterns become more extreme, such translocation may be a viable conservation strategy for some populations or species, yet the effects of novel conditions, such as relative hyperoxia, have not been well characterised. Our study examines the effect of downslope translocation on ectothermic thermal physiology and performance in Pyrenean rock lizards (Iberolacerta bonnali) from high elevation (2254 m above sea level). Specifically, we tested whether models of organismal performance developed from low-elevation species facing oxygen restriction (e.g., hierarchical mechanisms of thermal limitation hypothesis) can be applied to the opposite scenario, when high-elevation organisms face hyperoxia. Lizards were split into two treatment groups: one group was maintained at a high elevation (2877 m ASL) and the other group was transplanted to low elevation (432 m ASL). In support of hyperoxia representing a constraint, we found that lizards transplanted to the novel oxygen environment of low elevation exhibited decreased thermal preferences and that the thermal performance curve for sprint speed shifted, resulting in lower performance at high body temperatures. While the effects of hypoxia on thermal physiology are well-explored, few studies have examined the effects of hyperoxia in an ecological context. Our study suggests that high-elevation specialists may be hindered in such novel oxygen environments and thus constrained in their capacity for downslope migration.

scholarly journals Soft Spherical Tensegrity Robot Design Using Rod-Centered Actuation and Control

2016 ◽  
Author(s):  
Lee-Huang Chen ◽  
Kyunam Kim ◽  
Ellande Tang ◽  
Kevin Li ◽  
Richard House ◽  
...  
Keyword(s):  
Degrees Of Freedom ◽  
Low Cost ◽  
Space Exploration ◽  
Robot Design ◽  
The Novel ◽  
Flexible Design ◽  
Spherical Robot ◽  
Potential Benefits ◽  
And Performance ◽  
And Control

This paper presents the design, analysis and testing of a fully actuated modular spherical tensegrity robot for co-robotic and space exploration applications. Robots built from tensegrity structures (composed of pure tensile and compression elements) have many potential benefits including high robustness through redundancy, many degrees of freedom in movement and flexible design. However to fully take advantage of these properties a significant fraction of the tensile elements should be active, leading to a potential increase in complexity, messy cable and power routing systems and increased design difficulty. Here we describe an elegant solution to a fully actuated tensegrity robot: The TT-3 (version 3) tensegrity robot, developed at UC Berkeley, in collaboration with NASA Ames, is a lightweight, low cost, modular, and rapidly prototyped spherical tensegrity robot. This robot is based on a ball-shaped six-bar tensegrity structure and features a unique modular rod-centered distributed actuation and control architecture. This paper presents the novel mechanism design, architecture and simulations of TT-3, the first untethered, fully actuated cable-driven six-bar tensegrity spherical robot ever built and tested for mobility. Furthermore, this paper discusses the controls and preliminary testing performed to observe the system’s behavior and performance.

scholarly journals In Vitro Activity of the Novel Pleuromutilin Lefamulin (BC-3781) and Effect of Efflux Pump Inactivation on Multidrug-Resistant and Extensively Drug-Resistant Neisseria gonorrhoeae

2017 ◽  
Vol 61 (11) ◽  
Author(s):  
Susanne Jacobsson ◽  
Susanne Paukner ◽  
Daniel Golparian ◽  
Jörgen S. Jensen ◽  
Magnus Unemo
Keyword(s):  
Efflux Pump ◽  
Multidrug Resistant ◽  
Cross Resistance ◽  
Drug Resistant ◽  
The Novel ◽  
Extensively Drug Resistant ◽  
Optimal Dosing ◽  
And Performance ◽  
Reference Strains

ABSTRACT We evaluated the activity of the novel semisynthetic pleuromutilin lefamulin, inhibiting protein synthesis and growth, and the effect of efflux pump inactivation on clinical gonococcal isolates and reference strains (n = 251), including numerous multidrug-resistant and extensively drug-resistant isolates. Lefamulin showed potent activity against all gonococcal isolates, and no significant cross-resistance to other antimicrobials was identified. Further studies of lefamulin are warranted, including in vitro selection and mechanisms of resistance, pharmacokinetics/pharmacodynamics, optimal dosing, and performance in randomized controlled trials.

Preparation and performance of the novel PVDF ultrafiltration membranes blending with PVA modified SiO2 hydrophilic nanoparticles

2018 ◽  
Vol 59 (S1) ◽  
pp. E412-E421 ◽  
Author(s):  
De Sun ◽  
Dongmin Yue ◽  
Bingbing Li ◽  
Zhaoshan Zheng ◽  
Xiangchun Meng
Keyword(s):  
The Novel ◽  
Ultrafiltration Membranes ◽  
And Performance

scholarly journals Social media connectivity and its effect on job stress among office employees in oil and gas sector Malaysia

2021 ◽  
Vol 124 ◽  
pp. 08006
Author(s):  
Noreen Kanwal ◽  
Ahmad Shahrul Nizam Isha ◽  
Rohani bt Salleh
Keyword(s):  
Social Support ◽  
Social Media ◽  
Job Stress ◽  
Oil And Gas ◽  
Oil And Gas Industry ◽  
Alternative Methods ◽  
Physical Interaction ◽  
Bivariate Correlation ◽  
Level Of Significance ◽  
Office Employees

The modern era with technological advancement removed physical activities. Most of the people seem busy in their androids. Especially, office workers perform duties online throughout the working hours, along with online work activities employees have developed their interest in leisure activities on social media websites. Statistically, 81% of the Malaysian population are social media users in 2020, whereas 17% spend more than 9 hours on social media websites (Statista, 2020; Yougov, 2019). The purpose of the study is to identify the effect of social media addictiveness and social media activities related to the job on job stress among office employees. A simple random sampling technique is used to collect data. Data is collected through a questionnaire survey from 253 office employees working in the oil and gas industry, Malaysia. The reliability of the questionnaire was found through Cronbach alpha. Pearson Bivariate Correlation analysis is used to identify associations among social media addictiveness and social media activities related to job and job stress among office employees. The results indicated that social media addictiveness enhances job stress by 52% at 1% level of significance, whereas social media activities reduce job stress by 12% at 5% level of significance and social media addictiveness. It is concluded that job stress among office employees can be reduced by discouraging social media addictiveness. Although social media activities related to jobs decrease job stress, it can be harmful to the reputation of the employer and can create problems for the employee in the long term. Alternative methods should be used to release job stress, such as social support within the workplace and physical interaction among employees. This study is useful for the organizations related to office employees to identify the employees with social addiction, provide them training about safety in surfing online websites, enhance physical interaction and create social support for the employees within the organization. Employees may adopt the right channel to release their stress despite social media that is actually enhancing stress. Further, this study is valuable for the forthcoming researchers to enhance research in this area.

scholarly journals Microgeographic variation in locomotor traits among lizards in a human-built environment

2016 ◽  
Author(s):  
Colin Donihue
Keyword(s):  
Built Environment ◽  
Habitat Structure ◽  
Vertical Structure ◽  
Maximum Velocity ◽  
The Novel ◽  
Novel Habitat ◽  
Microgeographic Variation ◽  
And Performance ◽  
Locomotor Capacity

Microgeographic variation in fitness-relevant traits may be more common than previously appreciated. The fitness of many vertebrates is directly related to their locomotor capacity, a whole-organism trait integrating behavior, morphology, and physiology. Because locomotion is inextricably related to context, I hypothesized that it might vary with habitat structure in a wide-ranging lizard, Podarcis erhardii, found in the Greek Cyclade Islands. I compared lizard populations living on human-built rock walls, a novel habitat with complex vertical structure, with nearby lizard populations that are naive to human-built infrastructure and live in flat, loose-substrate habitat. I tested for differences in morphology, behavior, and performance. Lizards from built sites were larger and had significantly (and relatively) longer forelimbs and hindlimbs. The differences in hindlimb morphology were especially pronounced for distal components – the foot and longest toe. These morphologies facilitated a significant behavioral shift in jumping propensity across a rocky experimental substrate. I found no difference in maximum velocity between these populations, however females originating from wall sites potentially accelerated faster over the rocky experimental substrate. The variation between these closely neighboring populations suggests that the lizards inhabiting walls have experienced a suite of trait changes enabling them to take advantage of the novel habitat structure created by humans.

scholarly journals Development and Characterization of a Novel Porous-Media Borosilicate Glass Ion Sources for Electrospray Thruster

Aerospace ◽  
2021 ◽  
Vol 8 (10) ◽  
pp. 297
Author(s):  
Yuntian Yang ◽  
Dawei Guo ◽  
Xiaokang Li ◽  
Leimin Deng ◽  
Bixuan Che ◽  
...  
Keyword(s):  
Porous Media ◽  
Performance Improvement ◽  
Porous Glass ◽  
Borosilicate Glass ◽  
Positive Impact ◽  
Processing Technique ◽  
The Novel ◽  
Machine Method ◽  
And Performance

The porous-media-based electrospray thruster is a cutting-edge micropropulsion technology that can revolutionize the capabilities of microsatellites. This paper reports the design, fabrication, and characterization of a novel porous-media borosilicate glass electrospray thruster. The porous glass used here is integrally formed by the phase separation method, which make it display outstanding pore uniformity and processability. The picosecond ultraviolet laser processing technique is applied to machine 361 emitters out of glass. Performance characteristic experiments are conducted with the thruster passively fed with ionic EMI-BF4 liquid. The results reveal that the per-emitter can emit up to 200.46 nA of ion current at 2 kV. The novel porous glass and the corresponding machine method present an opportunity to attain more-controllable emitter shapes, which has a positive impact on thruster lifetime and performance improvement.

scholarly journals Design and implementation of CNTFET based ternary 1x1 memories

2019 ◽  
Vol 8 (3) ◽  
pp. 175 ◽  
Author(s):  
S.Tamil Selvan ◽  
M. Sundararajan
Keyword(s):  
High Performance ◽  
Data Access ◽  
Cmos Technology ◽  
Access Time ◽  
The Novel ◽  
Design And Implementation ◽  
Technology Process ◽  
Sram Cell ◽  
And Performance ◽  
Power Application

In this paper presented Design and implementation of CNTFET based Ternary 1x1 RAM memories high-performance digital circuits. CNTFET Ternary 1x1 SRAM memories is implement using 32nm technology process. The CNTFET decresase the diameter and performance matrics like delay,power and power delay, The CNTFET Ternary 6T SRAM cell consists of two cross coupled Ternary inverters one is READ and another WRITE operations of the Ternary 6T SRAM cell are performed with the Tritline using HSPICE and Tanner tools in this tool is performed high accuracy. The novel based work can be used for Low Power Application and Access time is less of compared to the conventional CMOS Technology. The CNTFET Ternary 6T SRAM array module (1X1) in 32nm technology consumes only 0.412mW power and data access time is about 5.23ns.

scholarly journals Causes of Errors in Construction Contract Documents in Southwestern, Nigeria

2017 ◽  
Vol 1 (2) ◽  
pp. 11-23
Author(s):  
Oluwaseun Dosumu ◽  
Godwin Idoro ◽  
Henry Onukwube
Keyword(s):  
Project Performance ◽  
Project Managers ◽  
Design Management ◽  
Southwestern Nigeria ◽  
Building Projects ◽  
Design Changes ◽  
Significant Difference ◽  
Causes Of Errors ◽  
Management Experience ◽  
Procurement Method

The issue of continual poor project performance in the construction industry remains unresolved and there is need for improvement. In view of improving project performance, the study aims at investigating the frequent causes of errors in construction contract documents. The survey research design and mixed research methods were used for the study. The respondents for the study consist of 86 consulting and 98 contracting firms that have been engaged on building projects that is above one floor between 2012 and 2015. Fifty one (51) interviews were also conducted on contractors, project managers and consultants on the projects they were involved and can equally provide necessary information for the study. Statistical Package for Social Sciences (SPSS 20) was used for the analysis of the study. The study found that the frequent causes of the errors in contract documents are frequent design changes by clients, lack of adequate time to prepare documents and design management experience among others. Based on the findings, it was concluded that the causes of errors in contract documents vary from one state to the other. It was also concluded that there is difference in the causes of errors in contract documents based on types of building, services rendered by construction organisations and states in South West, Nigeria. However, there is no significant difference in the causes of errors in contract documents based on procurement method except where there is incomplete documentation or contracting organisations have overlapping activities. The study recommends that the frequent errors identified should always be prevented from occurring if cost and time overrun are to be minimized. Also since most of the causes identified are related to consultants, it was recommended as suggested by interviewees that all designs must go through quality assurance process.Keywords: Building projects, Construction, Contract documents, Errors, project performance

Sign in / Sign up

Export Citation Format

Share Document