Autor: Ibe, C. C. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Estimation of inter-city travel demand for public road transport in Nigeria
Autorzy:: Dike, D. N.
Ibe, C. C.
Ejem, A. E.
Erumaka, O.
Chukwu, O. E.
Powiązania:: https://bibliotekanauki.pl/articles/2140965.pdf
Data publikacji:: 2018
Wydawca:: Fundacja Centrum Badań Socjologicznych
Tematy:: inter-city
demand
transport
elasticities
passenger
Opis:: This research develops an urban travel demand model for 19 directional O-D city-pair from Owerri Urban. Using revealed preference data from the period of 2014 to 2016 operated by sixteen transport companies in Owerri, Imo State. Other empirical findings include that; overall fares elasticities are low, so that increases in fare levels will almost always lead to increases in revenue. An empirical model to assess the viability of intercity passenger transport operation in Nigeria was formulated. This study will help the operators in business to do a sensitivity analysis based of changes in the intercity passenger travel markets in Nigeria.
Źródło:: Journal of Sustainable Development of Transport and Logistics; 2018, 3, 3; 88-98
2520-2979
Pojawia się w:: Journal of Sustainable Development of Transport and Logistics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Decoupling of economic activity and freight transport volume: An evidence for short sea shipping future in the ECOWAS sub-region
Autorzy:: Elem, T. R.
Ogwude, I. C.
Ibe, C. C.
Nnadi, K . U.
Ejem, Ejem Agwu
Powiązania:: https://bibliotekanauki.pl/articles/2141081.pdf
Data publikacji:: 2020
Wydawca:: Fundacja Centrum Badań Socjologicznych
Tematy:: decoupling
economic activity
short-sea
shipping
ECOWAS
Opis:: This paper explores the decoupling trend between GDP and freight volumes in the ECOWAS states to develop short sea shipping model for the ECOWAS sub-region aimed at reducing the cost per transported unit within the sub-region. The research is based on cross-sectional data from ECOWAS countries spanning from 2000 to 2013 and sourced from the ECOWAS Commission and National Bureaus of Statistics of some member countries. The data were analysed using arc elasticity which is a transport demand modelling tool, to determine the level of variations among trade volumes in the ECOWAS sub-region. It was discovered that total freight volume improved proportionally with growth in GDP for most of the periods in the ECOWAS member countries. This is confirmed by the coefficients of elasticity close 1 or higher than 1. In certain periods, however, the coefficient of elasticity of total freight volumes was found to be approximately zero, thus, indicating that considerable potential freights were lost. More stable values have the coefficients of general elasticity below 1. In most of the ECOWAS countries, the coefficients of general elasticity are unstable, both negative and positive values have a range of values (from -43.709 to 52.364). Hence, freight traffic volume and GDP in the ECOWAS region is highly decoupled. This has raised a serious question as to the prudence of continued dominance of road transport mode for intra-regional freight movement in the ECOWAS sub-region. The result of the study revealed a strong correlation between GDP, the population of member states and the volume of freight in the ECOWAS member countries. The research also showed that the development of short sea shipping model in the sub-region would depend considerably on growth in GDP, improvement in the productivity of the population and increase in seaport corridors of the ECOWAS sub-region.
Źródło:: Journal of Sustainable Development of Transport and Logistics; 2020, 5, 2; 124-134
2520-2979
Pojawia się w:: Journal of Sustainable Development of Transport and Logistics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Fixed-bed adsorptive removal of metanil yellow from simulated wastewater in a fixed-bed column by nitric acid-treated-H3PO4-activated carbon (NATPAAC) from oil palm fruit mesocarpfibre
Autorzy:: Isiuku, B. O.
Ojike, C. A.
Akakuru, O. U.
Ibe, F. C.
Powiązania:: https://bibliotekanauki.pl/articles/1112874.pdf
Data publikacji:: 2018
Wydawca:: Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:: Adsorption capacity
activated carbon
fixed-bed column
kinetic models
metanil yellow
Opis:: We carried out fixed-bed column adsorption of metanil yellow from simulated wastewater on NATPAAC derived from oil palm fruit mesocarpfibre so as to determine the adsorption capacity, qe, of the carbon under the effects of inlet concentration, Co, carbon bed height, H and dye solution flow rate, Q. Our results indicate that the optimum qe was 15.982 mg/g by Co 25 mg/L, H 4.1cm and Q 8 mL/min. In the study, qe was observed to decrease with increase in Co and Q. The optimum bed height was 4.1cm. Our experimental data were modelled by applying Thomas and Yoon-Nelson kinetic models. Correlation coefficient, R2 values (generally above 0.85) show that the two kinetic approaches provide an effective model of the experimental data. We conclude that oil palm fruit mesocarpfibre has potential as a precursor for production of carbon for acid-dye removal from wastewater.
Źródło:: World News of Natural Sciences; 2018, 17; 157-172
2543-5426
Pojawia się w:: World News of Natural Sciences
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Seasonal variability of carbon monoxide (CO) in the ambient environment of Imo State, Nigeria
Autorzy:: Njoku, P.
Ibe, F.C.
Alinnor, J.
Opara, A.
Powiązania:: https://bibliotekanauki.pl/articles/10877.pdf
Data publikacji:: 2016
Wydawca:: Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Opis:: The air qualities of four areas in Imo State with a total of twenty two locations were monitored for a period six months with respect to CO level using Gasman air monitor (Crowcon Instruments Ltd, England. The air quality monitoring was conducted in the morning, afternoon and evening hours within dry and wet seasons in order to elucidate the variability of this atmospheric pollutant in the study locations. The results obtained showed significant variation of the air pollutant in the morning, afternoon and evening including within the twenty four weeks, and between dry and wet seasons. The mean values of CO in the dry season are in the order Egbema > Okigwe > Owerri > Orlu, while the order for the mean CO level in wet season is Okigwe > Orlu > Egbema > Owerri. Elevated concentration of CO was observed in the study areas above 10 ppm, the Nigerian National ambient air quality standard. This observation calls for health and environmental concern. Hence, anthropogenic activities and fugitive emission sources of atmospheric pollutants such as increased vehicular traffic, biomass combustion, use of electric power generating sets, leakages from incinerators and flare stacks should be seriously monitored.
Źródło:: International Letters of Natural Sciences; 2016, 53
2300-9675
Pojawia się w:: International Letters of Natural Sciences
Dostawca treści:: Biblioteka Nauki

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