EFFECT OF DIFFERENT ACTIVITY DURATION DISTRIBUTION ON PROJECT DURATION PREDICTION PROBLEM

Adepeju A. Opaleye¹ & Oliver E. Charles-Owaba²

^{1 &2} Department of Industrial and Production Engineering,

University of Ibadan, Nigeria

Email: opaleye_adepeju@yahoo.com

ABSTRACT

Project scheduling researchers mostly rely on beta or triangular distribution for modelling activity duration. This reliance is associated with the underlying assumption of the traditional PERT model. Contemporary researches in this area have however partly refuted this concept and many different distributions proposed without empirical justification. In this study, availability of historical project activity duration data in construction industry was investigated and associated statistical distribution empirically determined. Effects of these distributions on the project completion time were also experimentally investigated. It is shown that about 49.23% of activities durations observed exhibited lognormal distribution and a significant difference in predicted project duration exist due to varying activity duration distribution.

WEB PAGE CONTENT BASED DOCUMENT RANKING FOR SEARCH ENGINE OPTIMIZATION

¹Agbator Lawrence & ²Akhetuamen Sylvester

¹Department of Computer Science, Edo State Institute of Technology and Management, Usen, Edo State

² Department of Computer Science, Federal Polytechnic Auchi

Email: mail4agbator@gmail.com, divinelaw1@yahoo.com

ABSTRACT

Search engine optimization is the process of enhancing the efficient ranking of a website or a web page in a search engine‘s normal search results. In information retrieval from the web by search engine, the more highly ranked a page or site is on the search results page, which will in turn make it to appear more frequently on the search results list, the more visitors it will receive from the search engine’s users. Search engine optimization may target different kinds of search, including image search, local search, video search, academic search, news search and industry-specific vertical search engines. As an Internet marketing strategy, Search engine optimization considers how search engines work, what people search for, the actual search terms or keywords typed into search engines and which search engines are preferred by their targeted audience.  Authors publish in a wide variety of formats, which includes deliberately misleading search platforms and hence increasing the chance of retrieving irrelevant web pages and this action has led to the degradation of search result. This paper presents a content-based document ranking method to counter this phenomenon and help to improve the educational relevance of information retrieved using search engines by concerned users.

Keywords: Walled-Search, Electronic-Publications, Web, Search-Engine, Retrieval-Process, Ranking, Algorithm, Random-Surfer

ALGEBRAIC MODELLING OF THE INTERCONNECTION AMONG MORPHOMETRIC PARAMETERS IN ATA OBIO AKPA GULLY COMPLEXES, ORUK ANAM, AKWA IBOM STATE, NIGERIA.

Nyetiobong Ikoedem William

Department of Geography and Natural Resources Management,

University of Uyo, Uyo.

Email: nyetiobongwilliam@yahoo.com

ABSTRACT

Gully as an endemic ecological issue have created uncalled-for geo-precarious topographic units that has over the years been a subject of modern geoscientists in different parts of the world. This work examined the morphometric parameters in Ata ObioAkpa gully complexes, OrukAnam, AkwaIbom State. The morphometric parameters such as Gully Width (W), Gully Depth (D), Cross sectional area (CS) and Slope angle (SA) were measured using measuring tape, ranging pole, Global Positioning System and Abney level. Interrelationship between gully morphometric parameters was analyzed using Pearson Product Moment Correlation Model (PPMCM) and the result revealed thatin gully site A, W & SA correlated strongly at P<0.05 and r = 0.857 and the relationship is significant; and SA & D, SA & CS, W & D, W & CS accounted for weak correlations at P>0.05 and r= -5.22, 0.196,-0.07 while W& CS and D & CS were moderate at p>0.05 and r=0.673 and 0.735. In gully site B, W, D & CS correlated strongly with SA at r= 0.917, 0.964 & 0.996; W and CS; D and CS also correlated strongly at r=0.880 & 0.983. In gully site B, the regression of slope angle and width is not significant at r²=73.4% and p>0.05; slope angle will increase by 0.7073 units for every one unit increase in width. In plot A, since r²=0.9294 and p>0.05, the relationship exists between SA and D but effect of D on SA is not significant; then slope angle will increase by 0.5537 units for every one unit increase in depth. In plot B, since r²=0.9864 and p>0.05, the existing relationship is insignificant; slope angle will increase by 0.3842 units for every one unit increase in depth. The shape of the gully in the stream catchment and gully size has been influenced by geomorphic processes and persistent hydrogeological events which has relative consequences on lithological, ecological, economic and geomorphic assets. Therefore, efforts should be geared towards approaching the phenomenon with adequate measures to controlling the magnitude of gully growth and expansion in the terrain for sustainable management of geo-hazards.

ANALYSIS OF HYDROCARBONS RELEASED THROUGH HYDROPYROLYSIS OF ASPHALTENES OBTAINED FROM SOUTH WALES SOIL SAMPLE

Ivwurie, W. & Appi, T.S.

Department of Chemistry,

Federal University of Petroleum Resources, Effurun, Delta State, Nigeria

Email: wivwurie@yahoo.co.uk       

ABSTRACT

Soil samples collected in South Wales was extracted and asphaltenes were precipitated from the extract. The asphaltenes were then subjected to hydropyrolysis to determine the percentage yield of hydrocarbon from asphaltene matrix. Open column chromatography was performed on asphaltenehydropyrolysate gave a percentage recovery of 91 %, suggesting that this process is a veritable tool for the release of bound hydrocarbons in asphaltene matrix. The mass balance for hydrocarbon distribution is consistent with literature

Keywords: Soil, Asphaltenes, Hydrocarbons, Hydropyrolysis

EFFECT OF UNRESTRICTED AND UNPROHIBITED IMPORTATION OF METAL FABRICATED PRODUCTS AND FURNITURES ON INDIGENOUS METAL FABRICATORS AND FURNITURE MAKERS IN NIGERIA

Idjawe, E. Emmanuel

Department of Metalwork

Federal College of Education, Asaba

Email: idjaweson19@yahoo.com

ABSTRACT

This study was carried out to ascertain the effect of unrestricted and un-prohibited importations of metal fabricated products and wooden furniture on indigenous metal fabricators and wood furniture makers in Nigeria. Two research questions were raised and one hypothesis formulated to guide the study. Survey research design, a population of 256 and a sample size 180 metal fabricators and wood furniture makers drawn from three Urban towns of Edo and Delta states of Nigeria was used for the study. A-24 item questionnaire was developed to elicit information from the respondents and percentage was used to analyze the data obtained while Chi-square was used to test the hypothesis at 0.05 level of significance. The study revealed that unrestricted and un-prohibited importation of metal fabricated products and wooden furniture causes low patronage of products to indigenous metal fabricators and wood furniture makers. Based on the findings of the study, a conclusion was drawn and some recommendations were made to address the issue of unrestricted and unprohibited importation of metal fabricated products and wood furniture in Nigeria. Among the recommendations made are: the Federal Government should enlighten the public through print and electronic media with appropriate jingles on the need to patronize locally made metal fabricated products and wood furnitures.

Keywords: Unrestricted, Un-prohibited, Importation, Metal-fabricated product and wooden furnitures.

DETERMINATION OF THE PARTICLE SIZE DISTRIBUTION OF SOME SOUTH EAST NIGERIA CLAYS BY LASER DIFFRACTION TECHNIQUE. 

Osonwa Nobert Okey¹, Victor T.D. Amaakaven², Nwabineli E.O.³, Ekenyem Stan Chinweike⁴, Ekwueme Ekenna⁵.

^1,2,3 Department of Ceramics and Glass Technology,

⁴. Department of Metallurgical Engineering,

^5. Department of Building Technology,

Akanu Ibiam Federal Polytechnic Unwana Afikpo Ebonyi State.

Email: nobertosonwa@gmail.com

ABSTRACT

The particle size  distribution of three south east Nigerian clays were studied using laser diffraction technique .The clay samples were collected from their natural deposits at Nsu in Ehime Mbano, Awo-Omamma  in  oru west ,both of Imo state, and Ohia in Umuahia South of Abia state, all in south eastern Nigeria .The dispersion medium used was deionized  water . It was discovered that the volume mean diameter of the clay samples were 6.56µm;8.93µm and 11.29µm for Nsu clay, Ohia clay and Awo-Omamma  clay  respectively . Also the mean surface area of the clay particles are 9560.93 cm²/g, 6445.79 cm²/g  and 6277.40 cm²/g  for Nsu, Ohia and Awo-Omamma  clays respectively .The  cumulative distribution of the smallest particle size fractions in the samples, as indicated  by X₁₀ values are 0.88 µm, 1.32 µm and 1.22 µm for Nsu,  Ohia  and Awo-Omama clays  respectively .

Keywords:Particle size, Clays, Laser diffraction, Analysis, Dispersion, Volume mean, Mean surface area.

EFFECTIVE INTEGRATION OF ARTIFICIAL INTELLIGENCE IN OUR MODERN SOCIETY

Obioha Iwuoha, Chidiebere C. Oparah

Department of Computer Science,

Federal Polytechnic Nekede Owerri, Imo State

Email: ohaobi@yahoo.com, canonchychuks@yahoo.com

ABSTRACT

In recent times, there has been delay of service delivery and slowdown in work done due to the scarcity of human professionals. These professionals in their various fields of study when available are over worked leading to them being tired and confused. The objective of this paper is to proffer effective ways that artificial intelligence could be used to substitute these human experts in their various endeavors.  The methodology to be used is the entity event modelling technique of Structured System Analysis and Design Methodology, which involves behavior modelling, identifying and documenting the events affecting entities and the life history in which these events occur. In this case, artificial intelligence is the entity. The result of this paper is the summary of ways to effectively integrate artificial intelligence in the affairs of our modern society.

Keywords: Artificial Intelligence, Algorithm, Expert System, Applications, Human Professional, Knowledge Reasoning

NUCLEAR SIZE CORRECTIONS TO THE ISOTOPE SHIFTS OF SINGLE-ELECTRON AND SINGLE-MUON ATOMS 

¹Adamu, A, ²Langa, E. D., ³Abbas, B. K., ⁴Olawale, A. R. and ⁵Balami, B. Y.

^{1, 3 & 4} Department of  Physics University of Maiduguri, Maiduguri, Nigeria

² Department of Basic science and technology, MOLCA, Maiduguri, Nigeria

 ⁵School of Basic and Applied Science, Federal Polytechnic Mubi, Adamawa State, Nigeria

 Email: aliyuadamu703@gmail.com

ABSTRACT

Isotope shift has played vital role in the understanding of atomic spectra. In this work, we determine the isotope shifts in the ground states and first excited states of light and heavy nucleus of single-electron and single-muon atoms, caused by the fact that the nucleus has a finite size distribution of charge. The results showed that the isotope shift due to the finite size of nucleus is increasing with the size of the nucleus for both single-electron and single-muon atoms. The results also showed that the isotope shift is very small for electron atoms as compared to the muon atoms. The difference could be attributed to a difference in the size of the nucleus and effective interaction orbiting particles (electron or muon) with the atomic nucleus. This study may also improve the knowledge of isotope shift for both light and heavy nucleus of single-electron and single-muon atoms caused by the fact that the nuclear has a finite size.

Keywords: Muon, Single-electron Atom, Single-muon Atom, Isotope Shift, Nuclear Size.